BARTON NUCLEAR MODEL 289A DIFFERENTIAL PRESSURE …

BARTON® NUCLEAR MODEL 289ADIFFERENTIAL PRESSURE

INDICATING SWITCH

User ManualPart No. 9A-C10310, Rev. 06

AUGUST 2021

ContentsSafety ............................................................................................................ 2

Section 1—Introduction ................................................................................. 3General ......................................................................................................... 3Main Components ......................................................................................... 3

Indicating Switch ...................................................................................... 4Relays ....................................................................................................... 5Wiring ........................................................................................................ 5Diff erential Pressure Unit (DPU) ............................................................... 5

Specifi cations ............................................................................................... 5Nuclear Qualifi cations ............................................................................... 6

Section 2—Installation ................................................................................... 7General ......................................................................................................... 7Mounting/Piping/DPU Installation ................................................................. 7Electrical Connection (Switches/Relays) ...................................................... 7Switch Use .................................................................................................... 7Startup .......................................................................................................... 8Switch and Relay Wiring Diagrams............................................................... 9

Section 3—Maintenance and Calibration ................................................... 14Tools............................................................................................................ 14Bezel/Lens (or Cover) Installation and Removal......................................... 14Calibration Check........................................................................................ 15Pointer Installation and Removal ................................................................ 16

Pointer Installation .................................................................................. 16Pointer Removal ...................................................................................... 16

Indicator Calibration .................................................................................... 17Drive Arm Tightness Test ......................................................................... 19Drive Arm Stop Adjustment .................................................................... 20

Switch Calibration ..................................................................................... 20Calibration Setup ..................................................................................... 20Calibration Procedure ............................................................................. 21

2

SafetyBefore installing this product, become familiar with the installation instruc-tions presented in Section 3 and in the Model 199 DPU manual (Appendix A), and all safety notes throughout.

! WARNING: This symbol identifi es information about practices or circum-stances that can lead to personal injury or death, property damage, or economic loss.

CAUTION: Indicates actions or procedures which if not performed correctly may lead to personal injury or incorrect function of the instrument or connected equipment.

IMPORTANT: Indicates actions or procedures which may aff ect instrument operation or may lead to an instrument response that is not planned.

Changing Switch Set Point ........................................................................ 22Defi nitions of Terms ................................................................................. 22Best Practices for Set Points ................................................................... 22Changing Set Point of an In-Service Instrument (Not Recommended for Nuclear Qualifi ed Units) .......................................................................... 23Changing Set Point of an Out-of-Service Instrument .............................. 24Range Changes ...................................................................................... 24Parts repalcement....................................................................................25

Troubleshooting ......................................................................................... 26Section 4—Assembly Drawing and Parts Lists ......................................... 29Section 5—Installation/Dimensional Drawings ......................................... 35Appendix A—Model 199 DPU User Manual ...............................................A-1

3

Model 289A Differential Pressure Indicating Switch Section 1

Section 1—Introduction

GeneralThe weatherproof Model 289A is a diff erential pressure indicating switch. The Model 289A has a NEMA-4 watertight die-cast aluminum case (fi nished with a weather-resistant black epoxy resin paint). The cover lens is secured in the bezel with an elastomer ring to reduce the possibility of accidental break-age. This ring also acts as a seal between the bezel and the case to ensure a moisture, fume and dust-free atmosphere for the indicator and switch mecha-nism. The large cover lens allows maximum readability of the indicating pointer.

Switches and all adjustments are readily accessible when the cover is re-moved.

The built-in switches either single or dual alarm circuits when the measured diff erential pressures exceed predetermined limits. These limits may be either maximum, minimum, or both.

Main Components

Low AlarmRelay

PlungerScrew

SwitchLock

Low Alarm Switch

Actuating Cam High Alarm

Switch

Switch Lock

Plunger Screw

Diff erential Drive Arm

High Alarm Relay

Hex Hub Zero Adjust

Switch Link

Movement Assembly

High Alarm Switch AdjustRange

AdjustPointer

Low Alarm Switch Adjust

Terminal Strip

Stop ScrewStop Screw

Figure 1.1—Switch components

4

Section 1 Model 289A Differential Pressure Indicating Switch

Indicating Switch

(refer to Figure 1.2, Figures 2.1 to 2.6, and Table 2.1)

Rotation of the DPU torque tube shaft is coupled through connecting linkage within the switch case to move the pointer across the scale plate. An actuat-ing cam, directly connected to the torque tube shaft, rotates with the motion of the shaft. Two cam follower roller/actuator arm assemblies, one for each switch, respond to torque tube rotation by opening and closing the switches as they ride on and off the cam. The levels of diff erential pressure at which the switches actuate are adjustable with high and low alarm switch adjustments on the scale plate.

RED

YELL

OW

BLU

E

BLA

CK

1000

50

Mid-point DP

ORA

NG

E

VIO

LET

SWITCHCLOSED

CONTACTSOPEN

CONTACTS

YELLOW & BLUE RED & YELLOW

VIOLET & ORANGE VIOLET & BLACK

A (LEFT)

B (RIGHT)

1000

50Zero DP

SWITCHCLOSED

CONTACTSOPEN

CONTACTS

YELLOW & BLUERED & YELLOW

VIOLET & ORANGE VIOLET & BLACK

A (LEFT)

B (RIGHT)

1000

50Maximum DP

SWITCHCLOSED

CONTACTSOPEN

CONTACTS

YELLOW & BLUE RED & YELLOW

VIOLET & ORANGEVIOLET & BLACK

A (LEFT)

B (RIGHT)

BOTH SWITCHES RELAXED

SWITCH “A” ACTUATED/SWITCH “B” RELAXED

SWITCH “A” RELAXED/SWITCH “B” ACTUATED

CAM

SWITCHPLUNGER

SCREW

SWITCH “A”(LEFT)LOW

SWITCH “B”(RIGHT)

HIGH

TERMINALBLOCK IN

CASE



HIGH



HIGH

Figure 1.2—Switch actuation example

5


Standard models can have one or two alarm switches. Each switch can be connected to operate normally-opened or normally-closed. The direct-set switch contacts are adjustable over a scale range of 5-95% nominal for SPDT switches and 6-94% for DPDT switches.

The cam rotates counterclockwise with increased pressure. In Figure 1.2, the low switch is set at 25% diff erential pressure, and the high switch is set at 75% diff erential pressure.

Switches are available in several variations.

• SPDT: This is the standard model (low, high, or both)• DPDT: Two switches are stacked and actuated by a single lever (low,

high, or both)• Three or four SPDT: Switches have independent switch points.

Switches 1 and 3 are usually low switches set for decreasing pressures; switches 2 and 4 are usually high switches set for increasing pressures.

Relays

Relays are actuated by internal switches and are available in several varia-tions:

• one or two SPDT switches• one or two DPDT switches

Wiring

No. 22 AWG is used for internal wiring and No. 18 AWG is used for external wiring.

Diff erential Pressure Unit (DPU)

For detailed information on the DPU, see the Model 199 DPU user manual in Appendix A.

Specifi cations General:Actuating Unit (DPU) ...................... Model 199 DPUDial Size ......................................... 6 inches (150 mm)Temperature Limits (Ambient) ........ -40°F (-40°C) to +180°F (+82°C)Switch Repeatability ....................... ±0.25% of full scaleSwitch Deadband ........................... ±5% (SPDT); ±6% (DPDT)Switch Type .................................... Mechanical, Snap-Acting; all switches are SPDT

(DPDT switches are stacked SPDT switches with a common actuator)

Relay Contact Type ........................ Single Pole, Double Throw (SPDT)Double Pole, Double Throw (DPDT)

Adjustability .................................... 5% to 95% of factory calibrated scaleActivation ........................................ Increasing or decreasing scale

6


Switch Contact Rating:5.0 Amps @ 125 VAC5.0 Amps @ 250 VAC, 50/60 Hz1

3.0 Amps @ 30 VDC (resistive)1,2

1.0 Amp @ 30 VDC (inductive with arc suppression)1,2,3

0.4 Amp @ 125 VDC (resistive)0.2 Amp @ 125 VDC (inductive w/arc suppression)1. CSA Approved2. CE Approved (Voltage limited to less than 50 VDC or 35 VAC for CE applications)3. Arc suppression recommended for inductive loadings

Relay Contact Ratings:10 Amps @ 150/250 VAC10 Amps @ 14/28 VDC 1.0 HP @ 208/240 VAC

Relay Coil Voltages:120 VAC @ 5VA Max.110 VDC @ 2W Max.

Coil Power Requirement:DC Relay ........................................ 1.5 WattsAC Relay ........................................ 2.75 Volt Amps

Accuracy of Indications Standard (1 or 2 SPDT Switches) .....................±1% of factory calibrated span (10-349 inches wc)

.....................±1.25% of factory calibrated span (350 inches wc to 115 psig)1 or 2 DPDT Switches (S401) .......................... Add ±1/2% to standard accuracyNear switch setpoint (±10% full scale) ............. Add ±1/2% to standard accuracyFor suppressed ranges .................................... Add ±1/4% to standard accuracy3 or 4 SPDT Switches ...................................... Add ±3/4% to standard accuracy

Switch Deadband:SPDT .............................................. ±5% of full scale DP (max)DPDT .............................................. ±6% of full scale DP (max)

Accuracy of Repeatability ............... ±0.25% of full scale DP

Nuclear Qualifi cationsThe following nuclear qualifi cation applications are based on Cameron Engineering Report 9A-CR3-288A-13 and 50277306-C-0000193 with switch chatter sensitivity ad-dressed in Cameron Engineering Report 9A-CR3-288A-19:• One or two SPDT switches: Radiation Augmented (3 MRads), Full Functional, 12G,

Mild Environment Applications• One or two DPDT switches: Structural and Pressure Boundary Integrity Applica-

tions• One or two relays: Structural and Pressure Boundary Integrity Applications• Three or four independently adjustable SPDT switches: Structural and Pressure

Boundary Integrity Applications

7


Section 2—Installation

GeneralThe instrument should be inspected at time of unpacking to detect any dam-age that may have occurred during shipment.

IMPORTANT: The DPU was checked for accuracy at the factory. Do not change any of the settings during examination or accuracy could be aff ected.

For applications requiring special cleaning/precautions, a polyethylene bag is used to protect the instrument from contamination. This bag should be removed only under conditions of extreme cleanliness.

Mounting/Piping/DPU InstallationDimensional drawings are provided in page 35. See the Model 199 DPU user manual in Appendix A for DPU installation and maintenance informa-tion.

Electrical Connection (Switches/Relays)Units are supplied with either single or dual alarm switches and/or relays (depending on customer order). The direct-set switch contacts are adjustable over 5% to 95% of the scale range for SPDT switches and 6% to 94% of the scale range for DPDT switches.

Table 2.1, page 8, shows switch and relay wiring color coding for legacy and current confi gurations. Figures 2.1 through 2.6 show switch and relay wiring.

The high switch and low switch set point adjustment procedures are covered in Changing Switch Set Point, page 22.

For physical location of switches, see Figure 1.1, page 3.

Switch UseSwitch contact life and setpoint repeatability are infl uenced by various ap-plication conditions such as temperature, humidity, airborne contamination, vibration, amount of plunger travel, cycling rate, and rate of plunger travel (and others), as well as by the electrical (circuit) characteristics.

8


IMPORTANT: Field calibrations and switch setpoint testing should be performed at the same application conditions as expected when the instruments are required to perform their safety functions. Performance testing at one ap-plication condition may not necessarily ensure appropriate performance at another condition.

IMPORTANT: Due to their size, subminiature switches have small mechanical clear-ances; therefore, no rating above 250 VAC has been established.

Table 2.1—Switch/Relay Wire Color Coding (4/06c)289A LEGACY CONFIGURATIONS

(prior to Apr. 2006) 289A CURRENT CONFIGURATIONS

NO C NC NO C NCSPDT SWITCHESLow Red Yellow Blue Red Yellow Blue

High Black Green White Black Violet Orange

DPDT SWITCHESLow #1 Red Yellow Blue Red Yellow Blue

Low #2 White/Red White/Yellow White/Blue White/Red White/Yellow White/Blue

High #1 Black Green White Black Violet Orange

High #2 White/Black White/Green White/Violet White/Black White/Violet White/Orange

4-INDEPENDENTLY ADJUSTABLE SWITCHESLow #1 Red Yellow Blue Red Yellow Blue

Low #2 White/Red White/Yellow White/Blue White/Red White/Yellow White/Blue

High #1 Black Green White Black Violet Orange

High #2 White/Black White/Green White/Violet White/Black White/Violet White/Orange

SWITCHES FOR RELAYS

Low Red Yellow Blue (Note 1) White/Brown Brown White (Note 1)

High Black Green White (Note 1) White/Gray Gray White (Note 1)

RELAYS

Low #1 Gray Blue Brown Red Yellow Blue

Low #2 White/Gray White/Blue White/Brown White/Red White/Yellow White/Blue

High #1 Violet White Orange Black Violet Orange

High #2 White/Violet White/Black White/Orange White/Black White/Violet White/Orange

Coil Wiring:

Legacy Ver.: Low = Red and High = Black Current Ver.: Low = White/Brown and High = White/Gray

Note 1: Wire is NOT connected.

StartupFor startup procedures, warnings, and other information, refer to the Model 199 DPU user manual in Appendix A.

IMPORTANT: To ensure the unit calibration is within factory-set calibration tolerances, perform the Calibration Check procedure on page 15.

9


Switch and Relay Wiring Diagrams

IMPORTANT: Figures 2.1 through 2.6 show: switch & relay contacts in the relaxed (shelf) condition, the low switch set to trip at a position below the pointer scale position, and the high switch set to trip at a position above the pointer scale position. NO = Normally Open in (shelf) condition. NC = Normally Closed in (shelf) condition. C= Common.

HIGH SPDT SWITCH

NOCNC

CASE

GRO

UN

D

GRE

EN

ORA

NG

E

VIO

LET

BLA

CK

ORA

NG

E

VIO

LET

BLA

CK

8 9 10

LOW SPDT SWITCH

NO

1 2 3

C NC

RED

YELL

OW

BLU

E

RED

CASE

GRO

UN

D

GRE

EN

YELL

OW

BLU

E

LOW & HIGH SPDT SWITCHES

NO NOC CNC NC

RED

YELL

OW

BLU

E

RED

CASE

GRO

UN

D

GRE

EN

YELL

OW

BLU

E

ORA

NG

E

VIO

LET

BLA

CK

ORA

NG

E

VIO

LET

BLA

CK

1 2 3 4 5 6 7 8 9 10

Figure 2.1—Low/high SPDT switch diagrams(current confi guration color codes - see Table 2.1, page 8)

10


HIGH DPDT SWITCH

NOCNC NOCNC

ORA

NG

E

VIO

LET

BLA

CK

ORA

NG

E

CASE

GRO

UN

D

GRE

EN

VIO

LET

BLA

CK

WH

ITE/

ORA

NG

E

WH

ITE/

VIO

LET

WH

ITE/

BLA

CK

WH

ITE/

ORA

NG

E

WH

ITE/

VIO

LET

WH

ITE/

BLA

CK

5 6 7 8 9 10

LOW DPDT SWITCH

NO C NC NO C NC

RED

YELL

OW

BLU

E

RED

CASE

GRO

UN

D

GRE

EN

YELL

OW

BLU

E

WH

ITE/

RED

WH

ITE/

YELL

OW

WH

ITE/

BLU

E

WH

ITE/

RED

WH

ITE/

YELL

OW

WH

ITE/

BLU

E

1 2 3 4 5 6

LOW & HIGH DPDT SWITCHES

NO C NC NO C NC

RED

YELL

OW

BLU

E

RED

CASE

GRO

UN

D

GRE

EN

YELL

OW

BLU

E

WH

ITE/

RED

WH

ITE/

YELL

OW

WH

ITE/

BLU

E

WH

ITE/

RED

WH

ITE/

YELL

OW

WH

ITE/

BLU

E

1 2 3 4 5 6

NOCNC NOCNC

ORA

NG

E

VIO

LET

BLA

CK

ORA

NG

E

VIO

LET

BLA

CK

WH

ITE/

ORA

NG

E

WH

ITE/

VIO

LET

WH

ITE/

BLA

CK

WH

ITE/

ORA

NG

E

WH

ITE/

VIO

LET

WH

ITE/

BLA

CK

7 8 9 10 11 12

Figure 2.2—Low/high DPDT switch diagrams(current confi guration color codes - see Table 2.1, page 8)

11


3-SWITCHESSPDT LOW & DPDT HIGH

NO

1 2 3 4

C NC

RED

YELL

OW

BLU

E

RED

YELL

OW

BLU

E

NOCNC NOCNC

ORA

NG

E

VIO

LET

BLA

CK

ORA

NG

E

CASE

GRO

UN

D

GRE

EN

VIO

LET

BLA

CK

WH

ITE/

ORA

NG

E

WH

ITE/

VIO

LET

WH

ITE/

BLA

CK

WH

ITE/

ORA

NG

E

WH

ITE/

VIO

LET

WH

ITE/

BLA

CK

5 6 7 8 9 10

3-SWITCHESDPDT LOW & SPDT HIGH

NO C NC NO C NC

RED

YELL

OW

BLU

E

RED

YELL

OW

BLU

E

WH

ITE/

RED

WH

ITE/

YELL

OW

WH

ITE/

BLU

E

WH

ITE/

RED

WH

ITE/

YELL

OW

WH

ITE/

BLU

E

1 2 3 4 5 6 7

NOCNC

CASE

GRO

UN

D

GRE

EN

ORA

NG

E

VIO

LET

BLA

CK

ORA

NG

E

VIO

LET

BLA

CK

8 9 10

Figure 2.3—3-switch diagram(current confi guration color codes - see Table 2.1, page 8)

4-SWITCHESINDEPENDENTLY ADJUSTABLE

NO C NC NO C NC

RED

YELL

OW

BLU

E

RED

YELL

OW

BLU

E

WH

ITE/

RED

WH

ITE/

YELL

OW

WH

ITE/

BLU

E

WH

ITE/

RED

WH

ITE/

YELL

OW

WH

ITE/

BLU

E

1 2 3 4 5 6

NOCNC NOCNC

ORA

NG

E

VIO

LET

BLA

CK

ORA

NG

E

CASE

GRO

UN

D

GRE

EN

VIO

LET

BLA

CK

WH

ITE/

ORA

NG

E

WH

ITE/

VIO

LET

WH

ITE/

BLA

CK

WH

ITE/

ORA

NG

E

WH

ITE/

VIO

LET

WH

ITE/

BLA

CK

7 8 9 10 11 12

Figure 2.4—4-switch diagram (3 or 4 independently adjustable switches)(current confi guration color codes - see Table 2.1, page 8)

12


HIGH SWITCHWITH SPDT RELAY

NO

NO

6 7 8 9 10

C

C

NC

NC

BLACK

VIOLET

ORANGE

WHITE/GRAY

WHITE/GRAY

WH

ITE

GRA

Y

WH

ITE/

GRA

Y

CASE

GRO

UN

D

GRE

EN

VIO

LET

BLA

CK

GRA

Y

WH

ITE/

GRA

Y

ORA

NG

E

LOW SWITCHWITH SPDT RELAY

NO

NO

1 2 3 4 5

C

C

NC

NC

RED

YELLOW

BLUE

WHITE/BROWN

WHITE/BROWN

WH

ITE/

BRO

WN

BRO

WN

WH

ITE/

BRO

WN

BRO

WN

WH

ITE

RED

CASE

GRO

UN

D

GRE

EN

YELL

OW

BLU

E

LOW & HIGHSWITCHES WITH

SPDT RELAYS

NO

NO

1 2 3 4 5 6 7 8 9 10

C

C

NC

NC

RED

YELLOW

WIRE NUT (TYPICAL)

BLUE

WHITE/BROWN

WHITE/BROWN

WH

ITE/

BRO

WN

BRO

WN

WH

ITE/

BRO

WN

BRO

WN

WH

ITE

RED

CASE

GRO

UN

D

GRE

EN

YELL

OW

BLU

E

NO

NO

C

C

NC

NC

BLACK

VIOLET

ORANGE

WHITE/GRAY

WHITE/GRAY

WH

ITE

GRA

Y

WH

ITE/

GRA

Y

VIO

LET

BLA

CK

GRA

Y

WH

ITE/

GRA

Y

ORA

NG

E

Figure 2.5—Low/high switch(es) w/SPDT relay(s) diagrams (current confi guration color codes - see Table 2.1, page 8)

13


HIGH SWITCHWITH DPDT RELAY

NO

6 7 8 9 10

C

NC

NO

C

NC

BLACK

VIOLET

ORANGE

WHITE/BLACK

WHITE/VIOLET

WHITE/ORANGE

WHITE/GRAY

WHITE/GRAY

VIO

LET

WH

ITE

BLA

CK

GRA

Y

WH

ITE/

GRA

Y

GRA

Y

CASE

GRO

UN

D

GRE

EN

WH

ITE/

GRA

Y

ORA

NG

E

NOCNC

LOW SWITCHWITH DPDT RELAY

NO

1 2 3 4 5

C

NC

NO

C

NC

RED

YELLOW

BLUE

WHITE/RED

WHITE/YELLOW

WHITE/BLUE

WHITE/BROWN

WHITE/BROWNW

HIT

E/BR

OW

NW

HIT

E/BR

OW

N

BRO

WN

BRO

WN

WH

ITE

RED

CASE

GRO

UN

D

GRE

EN

YELL

OW

BLU

E

NO C NC

NO

1 2 3 4 5

C

NC

NO

C

NC

RED

YELLOW

BLUE

WHITE/RED

WHITE/YELLOW

WHITE/BLUE

WHITE/BROWN

WHITE/BROWN

WH

ITE/

BRO

WN

WH

ITE/

BRO

WN

BRO

WN

BRO

WN

WH

ITE

RED

CASE

GRO

UN

D

GRE

EN

YELL

OW

BLU

E

NO C NC

LOW & HIGH SWITCHESWITH DPDT RELAYS

NO

6 7 8 9 10

C

NC

NO

C

NC

BLACK

VIOLET

ORANGE

WHITE/BLACK

WHITE/VIOLET

WHITE/ORANGE

WHITE/GRAY

WHITE/GRAY

VIO

LET

WH

ITE

BLA

CKG

RAY

WH

ITE/

GRA

Y

GRA

Y

WH

ITE/

GRA

Y

ORA

NG

E

NOCNC

WIRE NUT(TYPICAL)

Figure 2.6—Low/high switch(es) w/DPDT relay(s) diagrams(current confi guration color codes - see Table 2.1, page 8)

14


Section 3—Maintenance and Calibration

The following checks are recommended for preventive maintenance:

• Periodically inspect alarm switch mechanism to verify that all mounting screws are seated properly.

• Inspect linkage for wear. • Inspect integrity of electrical circuits. Tighten as necessary.

When repairs are necesssary, review this section for maintenance procedures such as bezel/lens installation and removal, pointer installation and removal, indicator calibration, switch calibration, and switch set point changes.

IMPORTANT: DPU maintenance is not addressed in this manual. See the Model 199 DPU user manual in Appendix A for related warning/caution notices and instructions on DPU inspection, cleaning, service, repair, range change, and BUA replacement. Never perform maintenance/repair on the in-strument or DPU without fi rst reviewing all procedures and warning/caution notices in the DPU manual.

ToolsThe following tools are recommended for general maintenance of the Model 289A DP indicating switch.

Table 3.1—ToolsEquipment Purpose

Pointer Puller Pointer removal

Small Screwdriver Calibration adjustment

Medium Screwdriver Bezel removal and replacement

1/4" and 1/8" Open-end Wrenches Zero (1/4") and Range (1/8") adjustments

1/8 Hex Allen Wrench Switch set point adjustment

3/32" Hex Allen Wrench Drive Arm Tightness Test

B ezel/Lens (or Cover) Installation and RemovalTo remove the bezel and lens (or cover), perform the following steps, using Figure 3.1 for reference.

1. Loosen the three screws on the front of bezel.2. Tilt the bottom of the bezel and slide the bezel upward.

To reinstall the bezel and lens, assemble the components per Figure 3.1, page 15. The two snubbers (Part No. 9A-C0266-0028C) on the scale plate should not be compressed against the lens cover and the pointer should not touch the lens.

15


Bezel(9A-C0277-0029C)

Cover (Lens)(9A-C0181-0038C)

Gasket(9A-C0277-0026C)

Case

Figure 3.1—Bezel and lens cover

IMPORTANT: Ensure the bezel gasket is properly oriented before placing the instru-ment back in service. Incorrect gasket orientation will cause the instru-ment indicator to jam, resulting in inaccurate readings.

Calibration CheckTo ensure the unit calibration is within factory-set calibration tolerances, perform the following procedure.

IMPORTANT: Review all procedures, WARNINGS/NOTICES in the Model 199 DPU user manual (Appendix A) BEFORE performing this procedure.

HUBPointer "slipped"rotated on hub

Hub held in placewith 1/4" wrench

Figure 3.2—"Slipping" pointer

1. Mount the instrument in an approximately level position and connect to a standard pressure source (see the Model 199 DPU user manual in Ap-pendix A).

2. If the zero indication is incorrect, adjust it as follows:a. Remove the bezel/lens assembly.b. Using a 1/4" open-end wrench (included in calibration toolkit, Part

No. 9A-0288-1032B), hold the hexagon pointer hub fi xed and rotate the pointer with fi ngers until the pointer indicates zero on the scale. See Figure 3.2.

c. Replace the bezel/lens assembly.

16


3. To test for reverse travel, connect the pressure source to the LP housing and vent the HP housing. Apply pressures approximately 150% of the DP range. The pointer should move approximately 5% to 10% below zero.

4. To test for overtravel, connect the pressure source to the HP housing and vent the LP housing. Apply pressures approximately 150% of DP range. The pointer should move approximately 5% to 10% above full scale.

5. Apply 0, 50, and 100% of full scale pressure. If indication is within specifi ed limits, no adjustments are necessary. If indication is not within specifi ed limits, perform a complete calibration (see Indicator Calibra-tion, page 17).

6. Make sure the instrument zero indication is correct; otherwise, repeat step 2.

7. Verify the switch set points (refer to Changing Switch Set Point, page 22).

Pointer Installation and RemovalDuring adjustment and calibration of the unit, it may be necessary to remove and reinstall the pointer according to the following procedures.

Pointer Installation 1. Position the pointer on the movement shaft with the pointer set at zero

scale. Obtain 75% to 90% pointer hub engagement on the movement pinion shaft. The pinion shaft must not extend through the pointer hub.It may be necessary to enlarge the hub hole, using a tapered broach (in-cluded in the calibration toolkit, Part No. 9A-0288-1032B).

2. Lightly tap the pointer hub with a hand-set or other fl at-end tool. Use perpendicular blows to avoid bending the shaft.

3. Check the calibration of the indicating switch over its entire range (refer to Indicator Calibration, page 17). If the indicating switch is correctly calibrated, secure the pointer to the movement shaft by tapping the hub with a hand-set or other fl at-end tool.

4. Test the pointer for tightness by moving the pointer from the zero to the 50% position manually, and then letting the pointer return freely to zero. If the pointer indicates a shift, tap the pointer hub to tighten it to the shaft.

Pointer Removal

The pointer is removed with a pointer puller shown in Figure 3.3, page 17. This tool is included in the calibration toolkit, Part No. 9A-0288-1032B.

To remove the pointer, perform the following steps:

1. Slide the pointer puller along the pointer until the pin protruding from the tip of the screw in the pointer puller is directly over the movement shaft and the arms of the pointer puller are directly under the pointer.

17


2. Gently turn the knurled head of the screw clockwise, pushing the pin against the movement shaft and lifting the pointer with the arms. Finger pressure should be suffi cient to pull the pointer free. If more pressure is required, an Allen wrench (inserted into head of the screw) can be used. However, care should be exercised to avoid breaking the pin.

HUBMOVEMENT SHAFT

POINTER

HUB

POINTER PULLER

Figure 3.3—Pointer puller (Part No. 9A-0163-0005B)

Indicator CalibrationA complete calibration of instrument is required whenever the DPU assembly is replaced.

IMPORTANT: Review all procedures, WARNINGS/NOTICES in the Model 199 DPU user manual (Appendix A) BEFORE performing this procedure.

1. Securely mount the instrument in an approximately level position and connect the DPU (see the Model 199 DPU user manual in Appendix A).

2. Remove the bezel/lens assembly. 3. Align the linkage between the drive arm and the movement at 50% diff er-

ential pressure (DP) as shown in Figure 3.4. Inspect parts for straightness and pivot-fi t without binding.

Figure 3.4—Range/linearity adjustment (50% DP)

18


4. Check the pointer for zero indication. If necessary, set the pointer to zero by slipping the pointer on the hub, per Calibration Check, step 2, page 15.

5. Apply 100% pressure. If the pointer exceeds full-scale, lengthen the movement range arm by adjusting the range adjust screw with a 1/8-in. open-end wrench.

6. Release pressure. Set the pointer to zero, by slipping the pointer on the hub, per Calibration Check, step 2, page 15.

7. Repeat steps 4 and 5, as necessary, to obtain the correct zero/full-scale.8. Apply 50% DP. If the pointer indicates 50%, proceed to step 9. If the

pointer does not indicate 50% scale, adjust linearity as follows. a. Loosen the drive arm screw (Figure 3.5) and move the arm to shift

the pointer in the direction of the error a distance of about 10 times the linearity error.

b. Check to see that the drive arm clears the end of torque-tube housing by approximately 0.030 in. before retightening the drive arm screw to prevent interference.

c. While supporting the block/shaft, tighten clamp screw until snug to shaft.

d. Still supporting block/shaft, tighten clamp screw an additional 1/3 to 1/2 turn. (This screw can normally turn one full revolution before breaking.)

e. Perform the Drive Arm Tightness Test described on page 19.

1/8” WRENCH (PN 9A-0163-0044C)

CLAMP SCREW

DRIVE ARM

LINK SINTEREDCLAMP BLOCK

TO TIGHTEN

.03 (approx)

M224

SHAFT

Figure 3.5—Drive arm to torque tube connection

9. Release pressure and reset the pointer at zero. Check the span. If the gear in the movement reaches a limit of travel as a result of linearity adjust-ment (step 7), slip the range arm along the gear approximately 5 degrees from the normal 37.5 degree angle to approximately 43 degrees (see step 2). The range arm is slipped by applying pressure to the range arm with

19


thumb, while holding the gear fi rmly in place. Retest the pointer response at 50%, 0%, and 100% of full-scale diff erential pressure, and adjust the linkage until the readings are acceptable.

10. Apply 0%, 25%, 50%, 75%, 100%, 75%, 50%, 25%, and 0% of full-scale diff erential pressure consecutively to the instrument without overshoot.Lightly tap the indicator to overcome friction. The pointer should accu-rately indicate each applied pressure.

11. Test the instrument repeatability by applying 0%, 50%, 0%, 50% of full-scale diff erential pressure. The indicator should accurately indicate each applied pressure.

12. Set the drive arm stop to prevent the pointer from striking the snubbers on the scale. (See Drive Arm Stop Adjustment, page 20.)

13. Test the pointer for tightness per the pointer installation instructions on page 16.

14. If the drive arm screw has been loosened, verify that it is adequately tight by performing the Drive Arm Tightness Test described below.

15. Reassemble the unit per the cover installation instructions on page 14.

Drive Arm Tightness Test

This procedure tests the tightness of the drive arm's connection to the torque tube by applying torque developed by the DPU onto a fi xed drive arm. Care should be taken to apply pressure slowly, as torque is being applied to the connection through the torque tube drive shaft.

1. With the pointer at normal 0% torque tube rotation position (0% on a normal 0 to 100% scale unit), adjust the drive arm stop bracket (or use alternate means) to prevent the pointer from moving (stop bracket inter-feres with drive arm movement).

IMPORTANT: On reverse acting/split range units, it will be necessary to pressurize the DPU to move the pointer to maximum minimum scale position, and on suppressed units, it will be necessary to apply pressure to establish a reference point to check for "zero" shift.

2. Pressurize the DPU to full calibrated scale DP (100% of full scale range) to achieve 8 degrees of torque tube equivalent torque onto the connec-tion.

3. Observe the shift in the unit "zero" following DPU depressurization (as required) and drive arm stop bracket readjusting (to allow free move-ment of drive arm and pointer). A downscale (counter-clockwise) shift in "zero" of greater than 1/2% is indicative of drive arm slippage, necessi-tating further clamp block tightening.

20


Drive Arm Stop Adjustment 1. Apply suffi cient pressure to the high-pressure housing to defl ect the

pointer against the full range stop snubber on the scale plate. 2. Slide the upper drive arm stop bracket against the drive arm and tighten

the drive arm stop bracket screw. 3. Apply suffi cient pressure to the low pressure housing to defl ect the

pointer against the zero stop snubber on the scale plate. 4. Bend the zero drive arm stop against the drive arm.5. Verify calibration as applicable.

Switch Calibration Before performing a complete calibration procedure, verify that the instru-ment is out of calibration, by performing a calibration check procedure (page 15). If the instrument is out of calibration, before performing a complete calibration procedure, remove the bezel/lens and scale plate and inspect the switch mechanism (Figure 3.6) to verify the following:

• The roller rotates without wobble or binding.• The cam is relatively centered under the roller.• The actuator arm moves freely on its pivot.• All switch mounting screws are tight.• Linkages are straight and do not bind at the pivots.

Correct any problems that are observed.

Figure 3.6—Switch mechanism

Calibration Setup1. Connect the lamp or buzzer to the switch output leads. 2. Connect a test voltage to the switch input terminals on the terminal strip.

(A low voltage is recommended for safety.) If a relay is installed in the instrument, coil voltage must be applied to the switch.

3. Unlock the switch plate and move the plate until the roller is positioned at the top of the cam.

21


4. Advance the plunger screw until the switch actuates, then advance the plunger screw an additional 60° (one fl at).

5. Exercise the switch roller up and down the cam to verify consistent on/off operation. Advance the stop screw to touch the switch, then back out the screw 1.5 turns (9 fl ats).

Calibration Procedure

To calibrate the switch linkage (required when the unit is rebuilt), perform the following steps. Refer to Figure 3.7 as needed.

1. Loosen the three linkage screws and turn the crank to the 12 o’clock position.

2. Use a 1/8-inch Allen wrench to hold the index shaft and slip the index pointer to 0 on the switch index. Tighten the screw on the crank to the mid-slot position.

3. Turn the switch index pointer to “1” (index numbers refer to numbers on outer edge of scale plate).

4. Apply 10% diff erential pressure and adjust the switch plate until the switch actuates. Lock the two linkage screws.

5. Rotate the index pointer to “9.” Apply 90% diff erential pressure and adjust the crank radius until the switch actuates.

6. Recheck 10% and 90% set points. Adjust the crank radius and the index pointer until both set points are 2% accurate (nominal).

Figure 3.7—Linkage arrangement

22


7. If the switch is to be fi eld-set at low diff erential pressure values (1% or 2% of pressure range), check the crank to prevent a top-dead-center posi-tion. Otherwise, the minimum set point position will be restricted and the set point may become reversed.

8. Adjust the switch to actuate at the desired pressure by applying test pres-sures in a decreasing direction, in discrete steps. Allow the unit and the pressure system to stabilize. Then change the pressure by a small amount. The magnitude of the pressure change is determined by the desired accuracy of the test. Tighten the lock screw before testing the switch performance.

IMPORTANT: The high switch is usually set to actuate at increasing pressure — when calibrating the high switch, apply test pressure in an increasing direction. This amount of loading will prevent cam-runout of a similar condition.

IMPORTANT: Excessive plunger loading (more than 3 fl ats) may cause the roller to drag on the cam. Cam friction will be apparent by excessive hysteresis, erratic pointer readings and inconsistent switch operation.

9. Check the switch deadband, (actuate to reset) by applying diff erential pressure, fi rst in a decreasing direction, then in an increasing direction (opposite for high switch direction). Observe pressures. To reduce dead-band, advance the plunger screw (two fl ats maximum).

10. Adjust the high switch to actuate at the desired pressure. The procedure is the same as for the low switch.

Changing Switch Set Point (Tools: Screwdriver, 1/8-in. hex Allen wrench)

Defi nitions of Terms

Set Point. The measured pressure at which the snap-switch actuates and thereby changes the states of the N.O and N.C. contacts. For example, the set point of the low switch is 24 psid with decreasing pressure.

Deadband. The diff erence in measured pressures between switch-actuation and switch-reset. Deadband is usually expressed as percent of full scale (% of F.S.). Deadband is not adjustable. For example, the switch in the set point example above was found to reset at 26.4 psid with increasing pressure. The deadband was 2.4 psi, or 4% of the full scale for a unit calibrated 0 to 60 psid.

Best Practices for Set Points1. Always check the set point after tightening switch lock screws.2. Switch setpoints may be set at any point of the scale range, except in a

location that will prevent the deadband from enabling the switch to reset

23


itself. For example, the high switch (right side of scale) may be set at full scale, but should not be set near zero. The low switch may be set at zero, but should not be set near full scale. (Observe deadband values for specifi c models).

3. If switch performance is unsatisfactory (set point does not repeat, dead-band is excessive, pointer exhibits hysteresis, contacts are unstable, etc.), remove the scale and inspect the switch and the switch mechanism. The scale is split to allow for removal without pulling the pointer.

Changing Set Point of an I n-Service Instrument (Not Recommended for Nuclear Qualifi ed Units)

Use the following procedure to set a set point for an instrument that is in ser-vice, when calibration pressures cannot be applied. See Figure 3.8 for specifi c locations denoted by items A, B, C and D.

1. Remove the bezel/cover. Do not remove the pointer or scale. 2. Insert hex wrench in the switch adjust post.3. Loosen the switch lock-screw, (item B), 1/2 to 1 turn.4. With a hex wrench, move the index pointer (item C) to the new set point

as indicated on the switch index (item D).5. If possible, check the set point by varying the process pressures and

observing the pointer readings when the switch actuates. (Open the mani-fold bypass valve slowly and watch for “pointer-jump” at the set point or by electrical signal.) Adjust the setting, if necessary, and repeat the test several times to verify stability.

Figure 3.8—Set point adjustment

24


IMPORTANT: The switch index has 10 divisions, marked 0, 5, and 10. These match the markings on the outer edge of the scale.

Example: Scale has range of 0-60 psid. Set point is 24 psid, with decreasing pressure, (24/60 x 10 = 4).

1. Move the index pointer (item C) for the low switch from division 0 to division 4.

2. Tighten switch lock (Item B) snug plus 1/4 turn to place the set point within ±2% of full scale. Do not overtighten.

3. Repeat step 1 for the high switch, moving the index pointer from division 10 to division 4, and tighten the switch lock as described in step 2.

Changing Set Point of an Out-of-Service Instrument

Use the following procedure to set a set point for an instrument that is out of service—typically, an instrument that is disconnected from process lines or mounted on a bench.

1. Drain and vent housings.2. Attach the calibration pressure source (air or N2) to the DPU HP housing.3. Apply varying pressures and observe pointer readings for accuracy. Use a

pressure standard (Heise gage or equiv.) for reference. Change pressures slowly in discrete steps. A “bleed-pressure” method may cause errors.

4. Change switch set point as described in In-Service Instruments, page 23.5. Check the set point by changing measured pressure to actuate the switch.

For example: To verify a low-switch set point of 24 psid, apply approxi-mately 30 psi. Reduce pressure to approximately 25 psid, hold for a few seconds, then continue in 1/4 psid steps until the switch actuates. If the set point is incorrect, continue instructions in In-Service Instruments, page 23.

6. To measure the switch deadband, reduce the pressure to zero, then in-crease pressure until the switch resets.

7. To verify repeatability of a set point, repeat step 5 several times. For improved accuracy, use smaller increments of pressure. Allow extra time for slow response gages and for test systems that have long runs of small-bore tubing.

High alarm switches (right side of the scale) are adjusted in a similar manner. Apply increasing pressure to establish the switch set point, and apply decreas-ing pressure to measure the deadband.

Range Changes

Changing the range of a Model 289A diff erential pressure indicating switch typically requires replacment of the 199 DPU.

25


Parts ReplacementDue to the new snap-acting microswitch being used in Model 289A diff eren-tial pressure indicating switch, the Drive Arm and Switch & Plate Assemblies have been redesigned. These assemblies are not backwards compatible and have to be installed at the same time for proper operation of the Model 289A.

Drive Arm and Switch & Plate Assemblies1. Remove the bezel/cover per Bezel/Lens (or Cover) Installation and Re-

moval, page 15.2. Remove pointer (see Pointer Installation and Removal, page 17)3. Remove scale plate by removing (4) Mounting Screws (see Figure 4.1).4. Disconnect the Link from the original Drive Arm Assembly (see Figure

3.4).*5. Loosen the Clamp Screw using 1/8” Open-end Wrench (for old style

Drive Arm) or 3/32” Hex Allen Wrench (for new style Drive Arm).*6. Carefully move the Actuator Arms away from the Cam and slide the

Drive Arm Assembly off the Torque Tube.*7. Disconnect the switch leads from the Terminal Block.8. Carefully remove the Grip Ring and Washer securing the Drive/Link

Plate assembly from the Switch and Plate Assembly and save for the installation process.

9. Remove the Lock Screw securing the high side Switch and Plate Assem-bly fi rst and uninstall the Switch and Plate Assembly. Repeat for the low side assembly.

10. Install and secure the replacement Switch and Plate Assemblies in the reverse order above.

11. Install the replacement Drive Arm Assembly and ensure that the cam is relatively centered under the cam rollers. Tighten the Clamp Screw using 3/32” Hex Allen Wrench.*

12. Reconnect the switch leads to the Terminal Block.13. Calibrate the switches per Calibration Procedure, page 21.

*Note: These steps may be omitted if the Model 289A is already equipped with the new Drive Arm and Switch & Plate Assemblies.

26


Troubleshooting For troubleshooting tips, see Table 3.2 below. For information related to the DPU, see the Model 199 DPU user manual in Appendix A.

Table 3.2—TroubleshootingProblem Possible

SourceProbable Cause Corrective

ActionLow or NoIndication

PrimaryElement or DPU(Refer to DPU Manual)

Orifi ce installed backwards or over-sized

Replace orifi ce

Flow blocked upstream from run Clean out run or open valve

Loss of liquid in reference leg (liquid level)

Refi ll reference leg

Density changes in process media or reference leg

Refi ll reference leg with same density liquid as process media

PrimaryElement to DPU Piping(Refer to DPU Manual)

Pressure tap holes plugged and/or piping plugged

Clean out piping

Bypass valve open or leaking Close bypass valve(s) and/or repair leaks

Liquids or gases trapped in piping Vent piping

Block or shutoff valves closed Open block or shutoff valves

Piping leaks on HP side Repair leaks

Bellows Unit(Refer to DPU Manual)

Housing fi lled with solids restricting bellows movement

Clean out hous-ing

Gas (liquid service) or liquid (gas ser-vice) trapped in housing

Vent housing

HP housing gasket leak Replace gasket

DPU tampered with Return BUA for repair

Indica-tor, Alarm Switch Mechanism

Loose linkage or movement Tighten or replace

Out of calibration Calibrate

Pointer loose Tighten pointer

Dirty or corroded mechanism Clean or replace

Wiring interfering with movement Re-route wiring

Dirty mechanism Clean mechanism

27




ActionHighIndication

Primary Source

Orifi ce partially restricted or too small Clean out or replace

Primary Element to DPU piping

Piping leaks on LP side Repair leaks

Bellows Unit (Refer to DPU Manual)

Gas (liquid service) or liquid (gas ser-vice) trapped in housing

Vent housing

LP housing gasket leak Replace gasket

Range spring broken or DPU tampered with

Return BUA for repair

Indicator, Alarm-Switch Mechanism

Loose linkage or movement Tighten or replace


Erratic Indication

Primary Element

Flow pulsating Install dampening device upstream of DPU run

Primary Element to DPU piping

Liquid (gas service) or gas bubble (liquid service) trapped in piping

Remove

Vapor generator incorrectly installed Re-pipe

Reference leg gassy or liquid vapor-izing

See piping instructions in DPU Manual

Bellows Unit(Refer to DPU Manual)

Obstructed bellows travel Clean bellows

Gas trapped in DPU HP or LP housing Remove (see startup proce-dure)

Linkage dragging or dirty Adjust or clean

Pointer dragging on scale plate Adjust pointer position

Inaccu-rate or NoElectrical Alarm

Power Supply

Blown fuse Replace fuse

Broken or loose wire Repair

Alarm Switch

Switch not properly adjusted Adjust switch

Dirty or burned Replace switch contacts

28




ActionSwitch Drifts (set point not repeat-able)

Process Changes

Transients or surges cause switches to actuate prematurely

Add time delay gages or add time circuit

Set point and/or deadband are too wide in pressure valves

Specify DP range as low as practi-cal; set point repeatability and deadband are percentage of full range

Electrical overloads aff ect the spring properties of the leaf actuator in the switch

Examine circuits for voltage, amperes

DC inductive loads cause arcing and burning of contacts

Consider arc-sup-pression devices or relays

Accumulation of fl uids in piping gener-ate artifi cial signal

Vent gas or drain liquids from signal lines

Calibration Techniques

Failure to check set point after locking Verify set point repeatability after locking switch plate

Rapid pressure change or venting system

During calibration, make pressure changes in slow, discrete steps

Pressure application in reverse Test low-alarm with decreasing pressure and high-alarm with increasing pres-sure

Reference gage inaccuracy Suitable pressure standard such as manom-eter, dead-weight tester, or Heise-type gage may be required

Damage to switch contacts Adjust plunger screws carefully to avoid damage to internal parts of switch

29


Section 4—Assembly Drawing and Parts Lists

Figu

re 4

.1—

Mod

el 2

89A

30


Table 4.1—Parts List, Model 289A Indicating SwitchItem Description Part No. Per Unit1 Diff erential Pressure Unit (not shown) See Model 199

DPU User Manual in Appendix A

1

2 Case Assembly 1

1/2 NPT Conduit, 1 & 2 Switches 9A-C0289-0003B

3/4 NPT Conduit, 1 & 2 Switches 9A-CS666-0051Z

1/2 NPT Conduit, 3 & 4 Switches 9A-CS469-0017Z

3/4 NPT Conduit, 3 & 4 Switches 9A-CS469-0078B

3 Drive Arm Assembly 1

Drive Arm Assembly, 1 & 2 Switches 9A-C0288-1204B-N

Drive Arm Assembly, 3 & 4 Switches 9A-CS469-1007B-N

4 Link Assembly 9A-C0288-0036B 1

5 Movement Assembly 9A-C0288-0035B 1

6 Movement Riser 9A-C0277-0035C 2

7 Snubber 9A-C0226-0028C 2

8 Stop Bracket 9A-C0288-0028C 1

9 Bracket, Terminal Block 1

10-Position (Standard) 9A-C0288-0029C

10-Position (For 14 AWG Terminal Blocks) 9A-C0288-1161C

12-Position 9A-CS469-0060Z

10 Screw, Rd Hd, 6-32 x 3/8, BRS, NP 9A-C0111-0015J 2

11 Screw, Sl Fil., Hd., 4-40 X 3/16, SST 9A-C0114-0023J 4

12 Screw, Bd Hd, 4-40 x 3/16, SST 9A-C0117-0012J 1

13 Screw, Bd Hd, 6-32 x 3/16, SST 9A-C0117-0013J 4

14 Terminal Block 1

10-Position (Standard) 9A-C0038-0033T

10-Position, 14 AWG 9A-C0288-1160C

12-Position 9A-CS469-0061Z

15 Strip, Insulator 1

10-Position (Standard) 9A-C0038-1345T

10-Position (For 14 AWG Terminal Blocks) 9A-C0038-1379T

12-Position 9A-C0038-1351T

16 Screw, Bezel 9A-C0181-0007C 3

17 Screw, Flat, Skt Cap, 10-32 x 1/2, SST (Riser/DPU)

9A-C0240-0019J 2

31


Table 4.1—Parts List, Model 289A Indicating SwitchItem Description Part No. Per Unit18 Screw, Flat, Skt Cap, 1/4-20 x 5/8, SST (Case

to DPU bracket)9A-C0240-0009J 4

19 Gasket, Torque Tube 9A-C0199-0209C 1

20 Stud, Drive-Lok, Retaining, Bezel 9A-C0004-0005K 1

21 Screw, Relay Mtg. Hole Filler (if relay is not installed, 2 per relay, not shown)

9A-C0111-0007J A/R

22 Ground Wire Assembly, External Wire See Table 4.2, page 34

A/R

23 Ground Screw, Hex HD, 8-32 x 5/16, Grn 9A-C0117-1012J 1

24 Washer, Lock, Internal Tooth, #8, SST 9A-C0003-0066K 1

25 Washer, Lock, ET, #8, SST 9A-C0003-0050K 1

26 Switch and Plate Assembly:(Tefzel Insulation-Radiation Resistant)see also item 29

A/R

Low, SPDT 9A-CS666-1200B-N

Low, DPDT 9A-CS401-0184B-N

Low Relay 9A-CS666-0284B-N

Low #1, Independently Adjustable* 9A-CS666-0286B-N

Low #2, Independently Adjustable* (not shown)

9A-CS666-0287B-N

*Note: If 3 or 4 independently adjustable switches are used, Low #1 is installed in the upper left position, and Low #2 is installed in the lower right position.

27 External Wire Assembly, Low See Table 4.2, page 34

A/R

28 External Wire Assembly, High See Table 4.2, page 34

A/R

29 Switch and Plate Assembly:(Tefzel Insulation-Radiation Resistant)see also item 26

A/R

High, SPDT 9A-CS666-1201B-N

High DPDT 9A-CS401-0185B-N

High Relay 9A-CS666-0291B-N

High #1, Independently Adjustable* 9A-CS666-0288B-N

High #2, Independently Adjustable*(not shown)

9A-CS666-0289B-N

*Note: If 3 or 4 independently adjustable switches are used, High #1 is installed in the upper right position, and High #2 is installed in the lower left position.

30 Low Alarm, Drive Plate Assembly 9A-C0288-0026B A/R

32


Table 4.1—Parts List, Model 289A Indicating SwitchItem Description Part No. Per Unit31 Low Switch, Switch Adjustment Index Assy 9A-C0288-0028B A/R

32 High Alarm, Drive Plate Assembly 9A-C0288-0027B A/R

33 High Switch, Switch Adjustment Index Assy 9A-C0288-0029B A/R

34 Washer, Spring (1 per switch) 9A-C0257-0019C A/R

35 Screw, Lock (1 per switch) A/R

Switch #1 and #2 9A-C0317-0012C

Switch #3 and #4 (not shown) 9A-CS469-0045Z

36 Washer, 1/2 OD x 0.14 ID, SST (1 per switch) 9A-C0317-0019C A/R

37 Grip Ring (1 per switch) 9A-C0087-0011T A/R

38 Link Plate (2 required when both low and high switches are used)

9A-C0288-1205C A/R

39 Strap 9A-C0288-0017C A/R

40 Screw, 3-48 x 3/16, SST, Binding Hd. (3 per switch)

9A-C0117-0007J A/R

41 Screw, 8-32 x 1/4, SST, Binding Hd. (1 per switch)

9A-C0117-0016J 1

42 Retaining Ring (1 per switch) 9A-C0087-0015T A/R

43 Washer, Flat, #3, SST (5 per switch) 9A-C0003-0045K A/R

44 Bezel Assembly (Bezel, Lens Cover, and Gasket)

9A-C0277-0018B 1

Bezel (part of 9A-C0277-0018B) 9A-C0277-0029C

Lens Cover (part of 9A-C0277-0018B) 9A-C0181-0038C

Gasket (part of 9A-C0277-0018B)* 9A-C0277-0026C

45 Disc, Sealer, 1/2" (w/3M 468 Adhesive) 9A-C0192-1035T 1

46 Washer, Split Lock, #8, SST (1 per switch) 9A-C0003-0036K A/R

47 Sealing Compound, RTV 103 9A-C0006-1001V A/R

48** Scale Plate 1

White, 1 & 2 Switches 9A-C0288-1014C

Black, 1 & 2 Switches 9A-C0288-0031C

White, 3 & 4 Switches 9A-CS469-0025Z

Black, 3 & 4 Switches 9A-CS469-0068Z

49* Pointer Assembly 1

White 9A-C0288-0030B

Black 9A-C0288-0031B

33


Table 4.1—Parts List, Model 289A Indicating SwitchItem Description Part No. Per Unit50 Tape Seal Patches 9A-CIT10-1045G 10

Low Relay Assy (not shown)(with Tefzel insulated wires)Coil Voltage Wired SPDT Wired DPDT115 VAC 9A-CS666-0238Z 9A-CS666-0245B110 VDC 9A-CS666-0231Z 9A-CS666-0256B

1

High Relay Assy (not shown)(with Tefzel insulated wires)Coil Voltage Wired SPDT Wired DPDT115 VAC 9A-CS666-0237Z 9A-CS666-0246B110 VDC 9A-CS666-0230Z 9A-CS666-0279B

1

Spacer, Switch Plate (used w/ single high switch or 3 independently adjustable switches when #3 position is not used, not shown)

9A-C0258-0007C 1

Screw, Switch Lock Hole Filler (if switch is not installed, 1 per switch, not shown)

9A-C0111-0028J A/R

Screw, Strap Hole Filler (if switch is not installed, 1 per switch, not shown)

9A-C0119-0042J A/R

* Calibration Kit (not shown) 9A-0288-1032B A/R

* Recommended spare part** If the scale plate is not identifi ed with an SCR number, provide the following information:

Square root or linear graduations, Scale (e.g., 0-100, 25-0-100, etc.)Number of graduations (linear scales only)Data (e.g., PSI, bar, inches of water column, meter, etc.)

Additional Notes: 1. A/R indicates as required. 2. When ordering parts, specify serial number of instrument. 3. For 199 DPU parts, refer to the Model 199 DPU user manual in Appendix A.4. Screws to be hand tight (approximately 1/8 turn past head contact)

34


Table 4.2—Tefzel Insulation (Radiation Resistant) External Wire Leads (Table 4.1, Items 27 and 28)

Wire Type 2.5 ft 10 ft 15 ft 20 ftLow #1 9A-CS666-0213Z 9A-CS666-0190Z 9A-CS666-0194Z 9A-CS666-0201ZHigh #1 9A-CS666-0140Z 9A-CS666-0191Z 9A-CS666-0195Z 9A-CS666-0202ZLow #2 9A-CS666-0166Z 9A-CS666-0241Z 9A-CS666-0268B 9A-CS666-0203ZHigh #2 9A-CS666-0167Z 9A-CS666-0242Z 9A-CS666-0269B 9A-CS666-0204ZLow Relay 9A-CS594-0137Z — — —High Relay 9A-CS594-0138Z — — —Ground 9A-CS666-0270B 9A-CS666-0271B 9A-CS666-0272B 9A-CS666-0273B

35

Model 289A Differential Pressure Indicating SwitchSection 5

S ection 5—Installation/Dimensional Drawings

IMPORTANT: For DPU dimensional information, refer to the Model 199 DPU user manual in Appendix A.

Figure 5.1—Model 289A, front view

Table 5.1—Model 289A Dimensions(see Figures 5.2 and 5.3, page 36)

PRESSURE RATING

PSI (MPa)

HOUSING MATERIAL

PRESSURE CONNECTION

DIM. A INCHES

(mm)

DIM. B INCHES

(mm)

DIM. C INCHES

(mm)

DIM. D INCHES

(mm)

# BO

LTSTOP BOTTOM

1,000 (6.9)

FORGED STNL ST 316

1/2" NPT

1/4" NPT

1/4" NPT

1/2" NPT

1/4" NPT

1/2" NPT

1/4" NPT

1/2" NPT

9-29/32 (251.6)

6-5/8 (168.3)

2 (50.8)

2-9/64 (51.2)

12

3,000 (20.7)

10-5/32 (257.9)

7-1/8 (181.0)

2 (50.8)

2-9/64 (51.2)

12

NOTES:Cast aluminum pipe mount supplied, unless otherwise specifi ed. Specify pipe size when ordering threaded steel adapter.Metric conversions are approximate.

36


Figure 5.2—Model 289A, side view; see Table 5.1, page 35 for dimensions A, C and D

Figure 5.3—Model 289A, rear view; see Table 5.1, page 35 for dimension B

IMPORTANT: Model 289A version confi gurations are limited to nuclear applications; also refer to the Model 199 DPU user manual in Appendix A.

37

Product Warranty A. Warranty Cameron International Corporation ("Cameron") warrants that at the time of shipment, the prod-

ucts manufactured by Cameron and sold hereunder will be free from defects in material and workmanship, and will conform to the specifi cations furnished by or approved by Cameron.

B. Warranty Adjustment(1) If any defect within this warranty appears, Buyer shall notify Cameron immediately.(2) Cameron agrees to repair or furnish a replacement for, but not install, any product which

within one (1) year from the date of shipment by Cameron shall, upon test and examina-tion by Cameron, prove defective within the above warranty.

(3) No product will be accepted for return or replacement without the written authorization of Cameron. Upon such authorization, and in accordance with instructions by Cameron, the product will be returned shipping charges prepaid by Buyer. Replacements made under this warranty will be shipped prepaid.

C. Exclusions from Warranty(1) THE FOREGOING WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER

EXPRESSED OR IMPLIED WARRANTIES OF MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE, OR OTHERWISE.

(2) Components manufactured by any supplier other than Cameron shall bear only the war-ranty made by the manufacturer of that product, and Cameron assumes no responsibility for the performance or reliability of the unit as a whole.

(3) "In no event shall Cameron be liable for indirect, incidental, or consequential damages nor shall the liability of Cameron arising in connection with any products sold hereunder (whether such liability arises from a claim based on contract, warranty, tort, or otherwise) exceed the actual amount paid by Buyer to Cameron for the products delivered hereun-der."

(4) The warranty does not extend to any product manufactured by Cameron which has been subjected to misuse, neglect, accident, improper installation or to use in violation of instructions furnished by Cameron.

(5) The warranty does not extend to or apply to any unit which has been repaired or altered at any place other than at Cameron's factory or service locations by persons not expressly approved by Cameron.

Product BrandBarton® is a registered trademark of Cameron International Corporation ("Cameron").

APPENDIX ABARTON® NUCLEAR MODEL 199

DIFFERENTIAL PRESSURE UNIT (DPU)

User ManualPart No. 9A-C10034, Rev. 04

November 2019

ContentsTechnical Support ......................................................................................A-2

Section 1—Introduction ..............................................................................A-3General ......................................................................................................A-3Product Description....................................................................................A-3Specifi cations .............................................................................................A-4

Section 2—Theory of Operation .................................................................A-5Basic Components .....................................................................................A-5Pressure Housings.....................................................................................A-5Bellows.......................................................................................................A-5Range Springs ...........................................................................................A-7Torque Tube Assembly...............................................................................A-7Pulsation Dampener ..................................................................................A-8

Section 3—Installation/Operation ..............................................................A-9Unpacking ..................................................................................................A-9Mounting ....................................................................................................A-9Flush or Panel Mounting ............................................................................A-9Piping—Standard Practices .......................................................................A-9All Applications (Flow and Liquid Level).....................................................A-9Flow Applications .....................................................................................A-10Liquid Level Applications..........................................................................A-10Piping Diagrams.......................................................................................A-11General Startup Practice Considerations.................................................A-17

Section 4—Maintenance, Adjustment, & Calibration .............................A-18Tools Required for Maintenance and Calibration .....................................A-18DPU Inspection and Cleaning ..................................................................A-18Pressure Check Procedure ......................................................................A-18Inspection and Cleaning Procedure .........................................................A-19Calibration Setup .....................................................................................A-20Torque Tube Rotation Check (Replacement Units)..................................A-21Range Change .........................................................................................A-212-1/8-inch Diameter Bellows ....................................................................A-21

A-2

SafetyBefore installing this product, become familiar with the installation instruc-tions presented in Section 3 and all safety notes throughout.

WARNING: This symbol identifi es information about practices or circum-stances that can lead to personal injury or death, property damage, or economic loss.

CAUTION: Indicates actions or procedures which if not performed correctly may lead to personal injury or incorrect function of the instrument or connected equipment.

IMPORTANT: Indicates actions or procedures which may aff ect instrument operation or may lead to an instrument response that is not planned.

3-3/4-inch Diameter Bellows Without Kickoff Spring (>47" w.c.) ..............A-223-3/4-inch Diameter Bellows with Kickoff Spring ....................................A-23Setting Bellows Travel..............................................................................A-25Bellows Unit Assembly (BUA) Replacement ............................................A-25Attaching Drive Arm to Torque Tube ........................................................A-26Drive Arm Tightness Test .........................................................................A-27Adjusting Pulsation Dampener.................................................................A-27Troubleshooting .......................................................................................A-27

Section 5—Parts Drawing/List .................................................................A-30Section 6—Dimensional Drawings ..........................................................A-35

Technical Support

CameronMeasurement Systems Division14450 John F. Kennedy Blvd.Houston, TX 77032Phone: 1-800-654-3760; 281-582-9500Fax: 281-582-9599

Barton is a registered trademark of Cameron.

© 2012 Cameron International Corporation (“Cameron”). All information contained in this publication is confi dential and proprietary property of Cameron. Any reproduction or use of these instructions, drawings, or photographs without the express written permission of an offi cer of Cameron is forbidden.

All Rights Reserved.Printed in the United States of America.

A-3

Model 199 Differential Pressure Unit (DPU) Section 1

Section 1—Introduction

GeneralThe Barton® Model 199 Diff erential Pressure Unit (DPU) (see Figure 1.1) is a mechanical device which accurately measures diff erential pressure relative to a gas or liquid fl owing through a process system, or to the level of a liquid contained in a process vessel.

Figure 1.1—Model 199 DPU unit

For process fl ow measurements, the DPU is connected across a primary de-vice (a venturi, an orifi ce plate or a fl ow tube) located in the process system.

For liquid level measurements, the DPU may be connected in a variety of ways to measure the diff erence in pressure caused by variations in the level of the liquid in the process vessel.

Product DescriptionThe Model 199 DPU is a dual bellows assembly enclosed within pressure housings. The dual bellows assembly consists of two opposing internally con-nected liquid-fi lled bellows, a center plate, range springs, overrange valves, and a torque tube assembly.

The pressure housings are connected by pipe or tubing to the primary device located in the system piping. Variations in diff erential pressure within the pressure housings cause the bellows to expand or contract in a linear direction towards the side having the lowest pressure.

The linear movement of the bellows is converted into angular rotation when transmitted to the torque tube shaft by the drive arm and this mechanical motion actuates the mechanism of the process monitoring instrument. The process monitoring instrument that is connected to the torque tube assem-bly may be an indicator, a switch, a transmitter, a recorder, or other process control device.

A-4

Section 1 Model 199 Differential Pressure Unit (DPU)

Specifi cations

Housing Material............................. Forged 316 Stainless SteelTorque Tube Rotation (full scale DP) 8° ±10%Torque Tube Material ...................... Beryllium Copper (BeCu)Temperature Limits ......................... -40°F (-40°C) to +180°F (+82°C)Maximum Non-linearity: .................. 0-10" w.c. to 0-400" w.c. (0-25 mbar to 0-993 mbar)

±0.5% of full scale with appropriate linkage........................................................ 0-401" w.c. to 0-100 psi (0-996 mbar to 0-6.9 bar) ±0.75% of full scale with appropriate linkageRepeatability ................................... 0.20% of full scale DPHousing Materials/Ranges ............. Refer to Table 1.1

Table 1.1—Diff erential Pressure Ranges for Model 199 DPUsSWP - psi

(bar)Stainless Steel or Inconel Bellows

2 1/8”(55 mm) O.D. 3 3/4” (95 mm) O.D.

1,000 (69) 0-15 psi to 0-115 psi

(0-1 bar to 0-7.9 bar)0-10" w.c. to 0-400" w.c. (0-25 mbar to 0-995 mbar)3,000

(207)

Net Volume, L.P. Head(cu. in.)

35 cu. in. (575 cc) 30 cu. in. (490 cc)

Net Volume, H.P. Head(cu. in.)

31 cu. in. (510 cc) 26 cu. in. (425 cc)

Displacement (cu. in.) for full-scale travel

0.5 cu. in. (8.2 cc) 1.5 cu. in. (25 cc)

NOTES: Zero center or split ranges available on special order (e.g., 0-50" w.c. (0-124 mbar) range may be ordered 25-0-25" w.c. (62-0-62 mbar) or 10-0-40" w.c. (25-0-99 mbar). Intermediate DP ranges available from 0-20" w.c. to 0-100 psi (0-50 mbar ot 0-6.9 bar). Standard pressure connections are 1/2" (top) and 1/4" (bottom) NPT. Range springs are not interchangeable between the diff erent size bellows. Metric conversions are approximate. Dimensional drawings available on request.

A-5


Section 2—Theory of Operation

Basic Components

Low PressureHousing

HP Housing

Torque TubeShaft

Center PlateTorque Tube Low Pressure Bellows

Range Spring

High Pressure Bellows

High PressureOverrange

Valve

TemperatureCompensator

Valve Stem

Low Pressure Overrange ValveHousing Bolts

Pulsation DamperDamping Valve Plug

Figure 2.1—199 BUA cutaway

Pressure Housings

The two pressure housings of the Model 199 DPU are available in the various safe working pressure ratings defi ned in Table 1.1, page A-4, and in the dimen-sional drawings in Section 6.

Each pressure housing has two tapped connection ports: one port is located in the top of the housing, the other port is located in the bottom of the housing.

Bellows

The bellows of the Model 199 DPU are available in the various materials and sizes (refer to Table 1.1, page A-4) to accommodate the various calibration ranges.

A-6


The DPU has two bellows. One end of each bellows is sealed. The open end of each bellows is attached and sealed to a side of the center plate (one bel-lows on each side) as shown in Figure 2.2.

The bellows and center plate are fi lled with fi ll liquid via the drive arm hole plug. An opening through the center plate provides a passageway for the transfer of fi ll liquid between the two bellows. This opening also allows the bellows to be connected internally by a valve stem.

Drive ArmHole Plug

(DO NOT LOOSEN)

RetainerScrews

Range SpringAssembly

Push Rod

Lock NutRange Springs

Torque Tube Shaft

Torque Tube Gland Nut(DO NOT LOOSEN)

2-1/8" Bellows Unit Assembly (BUA)

Spring Post

Drive ArmHole Plug

(DO NOT LOOSEN)

Range SpringAssembly

Retainer Nut

SpringEnd Cup

Push Rod

Lock NutRange Springs

Torque Tube Shaft

Torque Tube Gland Nut(DO NOT LOOSEN)

3-3/4" Bellows Unit Assembly (BUA)

Figure 2.2—Bellows unit assemblies (BUAs)

A-7


Range Springs

The range of the dual-bellows type DPU is determined by the force required to move the bellows through their normal range of travel.

The range springs, which are available in various ranges (see Table 1.1, page A-4), act with the bellows and torque tube to balance the diff erential pressure ap-plied to the unit. The number of springs used and their spring rate depends on the individual diff erential pressure range requirement.

Torque Tube Assembly

As illustrated in Figure 2.3, the torque tube assembly consists of a torque tube, a torque tube shaft, and the supporting members. The outboard end of the torque tube shaft is attached to the center plate. The torque tube shaft, located in the center of the torque tube, is welded to the inboard end of the tube.

Needle BeaingCenter Plate

Weld

Drive ArmValve StemDisc

0.200"Bellows Travel

Valve StemMinaturePrecision Ball Bearing

Jewel Bearing

Torque Tube Shaft

Torque Tube

Torque Tube Lock Nut

O-Ring Seal

Weld

8°Rotation

Figure 2.3—Torque tube assembly

Movement of the bellows is transmitted by the drive arm to the torque tube as a rotary motion. Since the torque tube is attached to the center plate, the tube must twist when subjected to torque. The torque tube shaft, which is freely supported within the torque tube at its outer end, but connected to the torque tube and drive arm at its inner end, rotates through the same angle as the dif-ferential pressure unit.

A-8


Pulsation Dampener

The pulsation dampener (Figure 2.1, page A-5) controls the fl ow of fi ll-liquid between the high and low-pressure bellows with an externally adjustable pul-sation dampener needle valve. Restriction of liquid fl ow reduces the eff ects of pulsation. In applications where pulsation is not a problem, the needle valve is set to the full-open position.

A-9


Section 3—Installation/Operation

UnpackingThe 199 DPU should be inspected at time of unpacking to detect any damage that may have occurred during shipment.

IMPORTANT: The instrument was checked for accuracy at the factory. Do not change any of the settings during examination or accuracy will be aff ected.

IMPORTANT: For application in critical media, requiring special cleaning processes and precautions, a polyethylene bag is used to protect the instrument from contamination. This protective bag should be removed only under conditions of controlled extreme cleanliness.

IMPORTANT: Do not locate the instrument near vents or bleed holes that discharge corrosive vapors or gases.

MountingMount the instrument to a solid support with four 1/2 inch (12 mm) grade 5 or better bolts, and apply 50 ft-lb of torque. To minimize relative motion of the DPU connections, use a mounting structure that will also support the interfac-ing tubing.

Mounting structures shall be designed to avoid resonance and/or minimize re-sulting amplifi cation below 33 Hz. Response spectra at the mounting surface of the instrument shall not exceed those in the applicable nuclear qualifi cation report.

Piping—Standard Practices

All Applications (Flow and Liquid Level)1. Shorten the distance between the primary device and the DPU as much

as possible. Distances exceeding 100 feet are not recommended. For dis-tances up to 50 feet, use 1/4-inch or 3/8-inch pipe or tubing. For runs of 50 to 100 feet, use 1/2-inch pipe or tubing. The recommended limitation does not apply if an air purge or blow-back system is used.

2. Slope all piping at least one inch per linear foot to avoid liquid or gas entrapment.

3. Provide 2 feet of non-insulated piping between the DPU and the primary device for each 100°F (+37.8°C) in excess of +200°F (+93.3°C).

A-10


4. Assure that the temperature of the DPU never exceeds 180°F (+82°C). When steam tracing is necessary, the steam pressure should not exceed 5 pounds per square inch and insulation should not be used. If pressure must exceed 5 pounds per square inch, limit the length of tubing around the DPU to two turns and do not insulate.

5. Install a suitable pulsation dampening device upstream of the DPU. Where severe pulsation is present, the accuracy of the fl ow measurement will be aff ected.

6. Mount the DPU on a solid support to minimize vibration. Tighten all points, using a suitable compound; leaks in piping can cause measure-ment errors.

7. Install a valve manifold connecting the DPU and the source of diff eren-tial pressure to facilitate operation and checking of the DPU.

8. Locate all shutoff valves and bypass valves to be readily accessible from the front of the instrument. Locate block valves at the source of diff eren-tial pressure.

Flow Applications

Assure that the DPU high-pressure housing is connected to the upstream tap of the primary device.

IMPORTANT: To prevent overheating the DPU during blowdown, monitor the tempera-ture by placing hands on the pipe between the DPU and the manifold pipe containing the vent valves.

Liquid Level Applications

The process media may be used as a reference leg seal fl uid if it will condense in the reference leg under all conditions.

If the process or process media characteristics are such that the above condi-tions cannot be met, a special reference leg seal fl uid is required. The special seal fl uid must not be volatile and must not be miscible with the process media. Also, the diff erence in the densities of the special seal fl uid and the process media will require compensation in calculating the diff erential pres-sure range of the DPU.

WARNING: Explosion Hazard—Organic compounds, oil, grease, dirt, or scale of any kind cannot be tolerated in an oxygen installation.

A-11


Piping Diagrams

Diagrams for typical and special fl ow applications are presented on the fol-lowing pages. Use the diagram best suited for the application as a guide for piping confi guration.

BLOCK VALVES

PRIMARY DEVICE

STATIC PRESSURECONNECTION

(USE ONLY ONE)

BYPASS VALVES

VENT VALVE

SHUT-OFFVALVES

DPU

Figure 3.1—Gas Flow, DPU Above Run

BLOCK VALVES

PRIMARY DEVICE


(USE ONLY ONE)

BYPASS VALVES

VENT VALVE

SHUT-OFFVALVES

DPU

DRIP POTS

Figure 3.2—Gas Flow, DPU Below Run

A-12


BLOCK VALVES

PRIMARY DEVICE

DRIP POTS


(USE ONLY ONE)

BYPASS VALVES

VENTVALVE

SHUT-OFFVALVES

DPU

Figure 3.3—Gas Flow, Hydrates Present

DPU

PLUGS

BLOCK VALVES

CONDENSINGRESERVOIR

PRIMARYDEVICE

SHUT-OFFVALVES

VENTVALVES(OPTIONAL)

Figure 3.4—Steam Flow, DPU Below Run

BLOCK VALVES

PRIMARYDEVICE

BYPASS VALVE

SHUT-OFFVALVES

DPU

Figure 3.5— Liquid Flow, DPU Above Run

A-13


BLOCK VALVES

PRIMARYDEVICE

BYPASS VALVE

FILL TEE ANDVENT VALVEFOR HOT ORGASSY LIQUIDS

SHUT-OFFVALVES

DPU

Figure 3.6—Liquid Flow, DPU Below Run

BLOCK VALVES

SEALPOTS

PRIMARYDEVICE

BYPASS VALVE

SHUT-OFFVALVES

DPU

Figure 3.7—Corrosive Liquid Flow

DRAINVALVE

BLOCK VALVE

HIGH-PRESSURE

DPU

BLOCK VALVE

SHUT-OFFVALVE

VENTVALVE

SHUT-OFFVALVE

Figure 3.8—Cool Non-Condensing Liquid, DPU Level with Tank Bottom

A-14


HIGH-PRESSURE

SHUT-OFFVALVE

BLOCK VALVE

DRAINVALVE

DPU

SHUT-OFFVALVE

BLOCK VALVE

Figure 3.9—Cool Non-Condensing Liquid, DPU Below Tank

HIGH-PRESSURE

SHUT-OFFVALVE

REFERENCELEG

2" CROSS

BYPASSVALVE

VENTVALVE

BLOCK VALVE

BLOCK VALVE

DPU

SHUT-OFFVALVE

DRAIN VALVE

Figure 3.10—DPU Below Tank Bottom with Reference Leg

A-15


SHUT-OFFVALVE

LOW-PRESSURE

DRAINVALVE

BLOCKVALVE

INVERTED "U"GAS TRAP

MINIMUM LENGTH6 INCHES

DPU

BLOCK VALVE

VAPOR GENERATOR

Figure 3.11—Liquid CO2

LOW-PRESSURE

HIGH-PRESSURE

SHUT-OFFVALVE

INVERTED "U"GAS TRAP

VAPOR GENERATORFLAT TUBULAR SPIRALIN OUTER 1/3 OF TANKINSULATION KEEPDEAD LEG BETWEENTANK AND SPIRAL5 INCHES OR LESS

MINIMUM LENGTH12 INCHES

BLOCK VALVE

BLOCK VALVE

DPU

Figure 3.12—Cryogenic Liquids

A-16


SHUT-OFF VALVES

BLOCK VALVES

HIGH PRESSURE

GASSUPPLY

SIGHT FLOW GAGE

BYPASS VALVE

DPU

INPUT GASREGULATOR

Figure 3.13—Bubbler System

SHUT-OFF VALVES

BLOCK VALVES

HIGH-PRESSURE

GASSUPPLY

INPUT GASREGULATOR

SIGHT FLOW GAGESWITH THROTTLING VALVES

BYPASS VALVE

DPU

Figure 3.14—Liquid Specifi c Gravity

A-17


General Startup Practice ConsiderationsObserve the following practices when starting up an instrument.

1. Always start with the block valves closed.2. Perform a zero check on the instrument as follows.

IMPORTANT: For gas service, it is recommended that zero check be performed with both block valves closed. If the gas fl ow is pulsating, there may be a standing wave eff ect in the process line which can displace the indicator and appear as a zero error.

a. Open the bypass valve(s), then open one shutoff valve. This proce-dure equalizes the pressure between both sides of the instrument. The instrument should indicate zero.

b. If the instrument does not indicate zero, check for gas or liquid en-trapment in the lines or in the DPU (depending on the orientation of the piping layout and service).

c. If necessary, adjust the pen or pointer by turning the zero adjust on the instrument.

3. Check the manifold and piping for leaks as follows.a. Open the bypass valve(s), then open one shutoff valve to pressurize

the instrument.b. Close the shutoff valve and the bypass valve.c. Any leakage will be indicated by pen or pointer movement, up or

down scale.

IMPORTANT: Be careful not to subject the DPU to unnecessary shock or overrange pressure during operations.

A-18


Section 4—Maintenance, Adjustment, & Calibration

Tools Required for Maintenance and CalibrationCameron's calibration tool kit (Part No. 9A-0202-1005B) contains the tools necessary for calibrating the Model 199 DPU. The tools listed in Table 4.1 are also recommended for performing general maintenance.

Table 4.1—ToolsDescription Purpose

7/16" Hex wrench Housing bolts

5/8" Hex wrench Housing bolts

1/8" Allen wrench Dampener Adjustment

1/2" Open ended wrench Push rod - bellows cup connection

Modifi ed box/open-ended wrench (7/16") Kickoff spring lock nut

100 ft-lb Torque wrench Housing bolts

DPU Inspection and CleaningInstruments used in services where solids or semi-solids may accumulate inside the pressure housings require periodic inspection and cleaning. Always check for internal pressure using the procedure below before removing the DPU housing bolts.

Pressure Check procedure

WARNING: Failure to perform this procedure can result in severe injury, death or substantial property damage due to the release of internal pressure. If the DPU has been installed in gas applications with working pressures greater than 200 psig, PERFORM THIS PROCEDURE BEFORE REMOVING THE DPU HOUSING BOLTS.

1. Back off all housing bolts 4 turns.2. Check for internal pressure by attempting to move the housing in and out

along the bolts.a. If the housing moves freely, no pressure is present and servicing or

repair may continue.b. If the housing does not move freely, the bellows may be pressurized

and is potentially hazardous if further disassembled. Tighten the bolts and return the unit to the factory or authorized Barton service center for repair. Tag the unit and specify "Gas in Bellows".

A-19


Inspection and Cleaning Procedure

Instruments used in services where solids or semi-solids may accumulate inside the pressure housings require periodic inspection and cleaning, as fol-lows.

1. Remove the DPU from service and remove the pressure housings.2. Carefully remove the pressure housings from the bellows unit assembly.

IMPORTANT: If accumulation of solids or semi-solids is extensive, rapid removal of the pressure housings can damage the bellows.

3. Remove the accumulation from between the bellows convolutions and from the inside of the housings. Use a solvent if possible. Do not use a sharp instrument to clean between convolutions.

4. Look for broken range springs and replace as necessary.5. Replace the housings and seals.6. Install NEW pressure housing bolts and torque in accordance with Table

4.2.

WARNING: Do not reuse housing bolts. Reuse of housing bolts, espe-cially in critical applications like hydrogen sulfi de and salt water expo-sures, can result in severe injury, death or substantial property damage due to bolt failure.

Table 4.2—Standard Bolt Torque Ratings

SWP HousingMat'l

BoltMat'l Size Qty Part No.

Lube

(N

ote

1)

Torq

ue (l

b/ft)

(N

ote

2)

Rot

atio

n (N

ote

3)

1000 StainlessSteel

Steel 3/8-16 x 4.5 12 9A-C0199-1345C Yes 40 270°

3000 StainlessSteel

Steel 1/2-13 x 5.5 12 9A-C0199-0085C Yes 80 180°

NOTES:1. Lubricants: Molykote G paste, Tefl on-base pipe dope, graphite-base grease, or similar lubri-cants. Lube fi rst 2 threads only. Do not lube bearing surface.2. Torque on bolts is accomplished in 3 or 4 steps. Tighten UNIFORMLY.3. Rotation of bolt head is measured after bolt is "snug," with approximately 5 lb/ft torque. DO NOT EXCEED THIS ROTATION. To tighten bolts without torque wrench, use rotation values.

A-20


Calibration SetupThe test equipment required to calibrate the Model 199 DPU, when attached to an indicator or switch is shown in Figure 4.1.

All Barton instruments using the Model 199 DPU as actuator are calibrated at the factory.

All DPUs sold as replacement units or as actuators for other applications are checked for accuracy prior to shipment.

Normally, the DPU is calibrated after installation on a specifi c instrument. Refer to the separate instrument manual for specifi c calibration procedures.

Figure 4.1—Calibration setup

A-21


Torque Tube Rotation Check (Replacement Units)Prior to installation as a replacement unit, a DPU should be checked for proper torque tube rotation, per the following procedure:

1. Mount DPU on a stable base and connect to a standard pressure source.2. Adapt a scale graduated in degrees to the torque tube housing.3. Adapt a pointer to the exposed end of the torque tube shaft.4. Apply 100% DP to the high pressure (HP) housing of the DPU. The

pointer should indicate 8 degrees of travel.

Range ChangeChanging the range of the Model 199 DPU may require replacing the bellows unit assembly with a unit of the desired range (see Bellows Unit Assembly (BUA) Replacement, page A-25).

WARNING: High-pressure gas hazard on disassembly of the DPU in installations with pressures greater than 200 psig. To prevent possible severe personal injury, death, or substantial property damage due to the release of internal pressure, PERFORM THE PRESSURE CHECK BEFORE REMOVING DPU HOUSING BOLTS.

IMPORTANT: If accumulation of solids or semi-solids is extensive, remove the hous-ings carefully to prevent damaging the bellows.

IMPORTANT: The calibration range of the DPU was carefully set at the factory. The following procedure maintains the original factory bellows travel setting while the range spring change is performed. This procedure must be strictly followed while changing the range spring assembly or altering the adjustment.

To replace the range spring assembly with either a new assembly of the same range or one with a diff erent range value, proceed as follows (this procedure assumes that the DPU is either connected to an indicating instrument or fi tted with a scale and pointer to measure torque tube shaft movement):

2-1/8-inch Diameter Bellows1. Remove the DPU from service.2. Remove the pressure housing bolts and the low-pressure housing.3. With the pointer at zero, remove the spring retainer screw, retainer

springs, and the range spring assembly.

IMPORTANT: The pointer will shift from zero. This is a normal action and the pointer should not be readjusted at this point.

A-22


4. Install the new range spring assembly onto the push rod, and replace the spring retainer screw.

5. If the pointer is set above zero, rotate the spring adjustment clockwise until the pointer is set at zero. If the pointer is below zero, rotate the spring adjustment counterclockwise until the pointer is set at zero.

6. Replace and tighten the lock nut. If the pointer shifts from zero, loosen the lock nut and reset the pointer as in step 5. Tighten the lock nut.

7. Replace the low-pressure housing and install NEW bolts (new gaskets are also recommended). Torque the bolts in accordance with Table 4.2, page A-19.


8. Calibrate in accordance with the manual for the actuated instrument.

3-3/4-inch Diameter Bellows Without Kickoff Spring (>47" w.c.)1. Remove the instrument from service.2. Remove the pressure housing bolts and the low-pressure housing.3. With the pointer set at zero, remove the lock nut retainer nuts, and the

range spring assembly. To remove the range spring assembly, rotate the assembly counterclockwise while pulling outward on the assembly.

IMPORTANT: The pointer will shift from zero. This is a normal action and the pointer should not be readjusted at this point.

4. Thread the new assembly onto the push rod, and align the holes in the range spring assembly with the spring posts. Replace and tighten the retainer nuts.

5. Using a spanner wrench, rotate the spring adjustment until the pointer is set at exact zero. Replace and tighten the lock nut. The pointer must remain at the zero setting. If the pointer shifts from zero, loosen the lock nut and repeat this step.

6. Replace the low-pressure housing and install NEW bolts (new gaskets are also recommended). Torque the bolts in accordance with Table 4.2, page A-19.


7. Calibrate in accordance with the manual for the actuated instrument.

A-23


3-3/4-inch Diameter Bellows with Kickoff Spring

The kickoff spring (also referred to as the "anti-stick" spring) is supplied as standard equipment with 46" w.c. and lower range DPUs.

Figure 4.2—Kickoff spring assembly

IMPORTANT: The lock nut requires a modifi ed 7/16", 12-point box wrench for tighten-ing (Figure 4.3).

Figure 4.3—Wrench modifi cation

1. Remove the instrument from service. Set the pointer at zero using the instrument zero adjustment.

2. Remove the pressure housing bolts and remove the low-pressure housing.3. With the pointer set at zero, remove the lock nut, spring retainer nuts,

washer and lock nut, and range spring assembly.

IMPORTANT: The pointer will shift from zero. This is a normal action and the pointer should not be readjusted at this time.

A-24


4. Install the range spring assembly, using a 1/2-inch open-ended wrench to connect the push rod to the low-pressure bellows cup.

IMPORTANT: The range spring assembly consists of the range springs, kickoff spring assembly, and the push rod. The assembly is furnished as a complete and assembled unit.

5. Position range spring assembly over retainer posts and replace retainer nuts.

6. Insert the tubing between the range springs and tighten inboard lock nut.7. Zero the pointer by adjusting the spud on the push rod. Be sure that the

kickoff spring is not engaged during this operation.8. Position the kickoff spring to prevent interference with the coil springs

and tighten the kickoff spring lock nut. If clearance is needed for the wrench, note the position of the spud (measure with a scale or count threads to the end of the push rod) and move the spud for the required clearance. After the lock nut is tightened, return the spud to its original position.

9. Check the back-clearance between the kickoff spring and the slot. Use a wire feeler gage or comparable measuring device. The clearance between slots will vary, but must be at least 0.005-in. to prevent interference with instrument zero. Add or remove washers as required to obtain the proper clearance. Tighten the lock nut securely.

10. Install the jam nut and lock the spud to the push rod. Hold with pliers. If the spud was moved in step 8, return the spud to the proper position before tightening the jam nut.

11. Apply 100 percent negative pressure to the high-pressure side of the DPU and repeat the clearance check and adjustment described in step 9.

12. Apply 100 percent positive pressure to the high-pressure side of the DPU and repeat the clearance check and adjustment described in step 9.

13. Release all pressure from the instrument, replace the low-pressure hous-ing and install NEW bolts (new gaskets are also recommended). Torque the bolts in accordance with Table 4.2, page A-19.


A-25


Setting Bellows TravelThe travel of the DPU bellows must be adjusted if one of the following oc-curs.

1. The range spring assembly is removed without following the procedure.2. Broken range springs are replaced.3. The indicator pointer has excessive overtravel.4. The indicator pointer has excessive undertravel.

Setting the bellows travel requires that the DPU be attached to the actuated instrument and connected to a test pressure source. The procedure for this adjustment is presented in the manual for the actuated instrument.

Bellows Unit Assembly (BUA) ReplacementBefore replacing the BUA, read the following warning messages and refer-ence Figure 2.1, page A-5, to locate parts described in the following procedure.

WARNING: High-pressure gas hazard on disassembly of the DPU in installations with pressures greater than 200 psig. To prevent possible severe personal injury, death, or substantial property damage due to the release of internal pressure, perform the pressure check procedure on page A-18 before removing the DPU housing bolts.

IMPORTANT: If accumulation of solids or semi-solids is extensive, remove the hous-ings carefully to prevent damaging the bellows.

IMPORTANT: Component Removal—See the manual for the actuated instrument for particular components that must be removed to gain access to DPU case mounting screws. Support DPU during disassembly. Do not loosen the drive arm hold plug (located in the top of the BUA center plate) when removing the mounting bracket. If the plug is loosened, bellows fi ll fl uid will be lost.

1. Disconnect the DPU piping and remove the instrument from service.2. Loosen the actuated instrument drive arm and slide off of the torque tube

shaft. Do not disconnect the instrument linkage.3. Remove the case-retaining screws and remove the case assembly.4. Remove the indicator bracket screws and the indicator bracket.5. Remove the pressure housings bolts and pressure housings.6. Place the pressure housings on the replacement bellows unit assembly

and insert and start (only) the pressure housing bolts.

A-26


WARNING: Do not reuse housing bolts. Reuse of housing bolts, especial-ly in critical applications like hydrogen sulfi de and salt water exposures, can result in severe injury, death or substantial property damage due to bolt failure.

7. Attach the indicator bracket to the replacement assembly, using the indi-cator bracket screws.

8. Attach the mounting bracket using the screws provided.9. Support the DPU and tighten and torque the pressure housing bolts in

accordance with Table 4.2, page A-19.10. Attach the case assembly using case retaining screws.11. Attach the drive arm and linkage.12. Tighten the drive arm to the torque tube, as described below.13. Replace any instrument components that were removed (refer to the "Im-

portant: Component Removal" notice on page A-19).14. Calibrate the instrument before returning it to service.

Attaching Drive Arm to Torque Tube

1/8” WRENCH (PN 9A-0163-0044C)

CLAMP SCREW

DRIVE ARM

LINK SINTEREDCLAMP BLOCK

TO TIGHTEN

.03 (approx)

SHAFT

Figure 4.4—Drive arm to torque tube connection

1. Slip the drive arm over the torque tube shaft; clear the end of the torque tube housing by approximately 0.030 inches before securing to prevent interference.

2. To tighten the drive arm assembly onto the torque tube shaft:a. Supporting the block and shaft, tighten the clamp screw until it is

snug to the shaft.b. Still supporting the block/shaft, tighten the clamp screw an addition-

al 1/3 to 1/2 turn. (The screw can normally turn one full revolution before breaking.)

A-27


Drive Arm Tightness TestThis procedure tests the tightness of the drive arm's connection to the torque tube by applying torque developed by the DPU onto a fi xed drive arm. Care should be taken to apply pressure slowly, as torque is being applied to the connection through the torque tube drive shaft.

1. With the pointer at normal 0% torque tube rotation position (0% on a normal 0 to 100% scale unit), adjust the drive arm stop bracket (or use alternate means) to prevent the pointer from moving (stop bracket inter-feres with drive arm movement).

IMPORTANT: On reverse acting/split range units, it will be necessary to pressurize the DPU to move the pointer to the minimum scale position, and on suppressed units, it will be necessary to apply pressure to establish a reference point to check for "zero" shift.

2. Pressurize the DPU to full calibrated scale DP (100% of full scale range) to apply 8 degrees of torque tube equivalent torque to the connection.

3. Observe the shift in the unit "zero" following DPU depressurization (as required) and drive arm stop bracket readjusting (to allow free movement of drive arm and pointer). If the "zero" shifts counter-clockwise more than 1/2%, tighten the clamp block to prevent drive arm slippage.

Adjusting Pulsation DampenerReference Figure 6.1, page A-35, for the location of the pulsation dampener valve.

1. Remove the dust cover and insert a 1/8-in. hex key into the needle valve.2. Turn the valve clockwise to the closed position, approximately 3 turns.3. Back out the valve 1/2 turn or as required to reduce pulsations/shock

pressures.

TroubleshootingSee Table 4.3, page A-28, and refer to actuated instrument manual for more infor-mation.

A-28


Table 4.3—Troubleshooting ChartTrouble Possible Source Probable Cause Corrective Action

Low or No Indication

Primary Element or Diff erential Pressure Source

Orifi ce installed backwards or oversized

Replace orifi ce

Flow blocked upstream from run

Clean out run or open valve

Loss of liquid in reference leg (liquid level)

Refi ll reference leg

Density changes in pro-cess media or reference leg

Refi ll reference leg with same density liquid as process media

Piping from Primary Element to DPU

Pressure tap holes plugged

Clean out piping

Bypass valve open or leaking

Close bypass valve(s) or repair leaks

Liquids or gases trapped in piping

Vent piping

Block or shutoff valves closed

Open block or shut-off valves

Piping leaks, HP side Repair leaks

Bellows Unit Housing(s) fi lled up with solids, restricting bellows movement

Clean out housing(s)

Gas trapped (liquid ser-vice) or liquid trapped (gas service) in housing(s)

Vent housing(s)

HP Housing gasket leaks Replace gasket

DPU tampered with Return BUA for repair

Mechanism Loose links/movements Tighten or replace


Corrosion or dirt in mecha-nism

Clean or replace

Pointer loose Tighten pointer

A-29


Table 4.3—Troubleshooting ChartTrouble Possible Source Probable Cause Corrective Action

HighIndication

Primary Orifi ce partially restricted or too small

Clean out or replace


Leak in LP side piping Repair leaks

Bellows Unit Gas trapped (liquid service) in LP housing or liquid trapped (gas ser-vice) in HP housing

Vent housing

LP housing gasket leaks Replace gasket

Range spring broken or DPU tampered with

Return BUA for repair

Mechanism Loose links or movements Repair or replace


Erratic Indication

Primary Flow pulsating Install dampening device upstream of DPU run


Liquid trapped in gas piping or gas bubble in liquid piping

Remove (see Startup Procedure, Section 3)

Vapor generator incor-rectly installed

Repipe

Reference leg gassy or liquid vaporizing

See piping instruc-tions

Bellows Unit Obstructed bellows travel Clean bellows

Gas trapped in DPU HP or LP housing

Remove (see Startup Procedure, Section 3)

Mechanism Linkage dragging or dirty Adjust or clean

Pointer dragging on scale plate

Adjust

A-30

Section 5 Model 199 Differential Pressure Unit

Section 5—Parts Drawing/List

Figure 5.1—Model 199 DPU parts drawing (indicator and indicator switch mounting brackets vary as shown; see 200A/289A and 581A insets)

A-31

Model 199 Differential Pressure Unit Section 5

Table 5.1—Model 199 Parts List

Item Description Part No. Per Unit

1 BUA (BELLOWS UNIT ASSEMBLY) SELECT 1

2 HOUSING, PRESSURE, TAPPED (MATCH PORTS WITH ITEM 3)

1

HOUSING, 1 K SST, 1/4 X 1/4 NPT 9A-CS787-0071C

HOUSING, 1 K SST, 1/4 X 1/2 NPT (TOP/BOTTOM) 9A-CS787-0061C

HOUSING, 1 K SST, 1/2 X 1/4 NPT (TOP/BOTTOM) 9A-C0199-1038C

HOUSING, 1 K SST, 1/2 X 1/2 NPT 9A-CS787-0025Z


HOUSING, 3 K SST, 1/4 X 1/2 NPT (TOP/BOTTOM) 9A-CS787-0057Z



3 HOUSING, PRESSURE, DRILLED (MATCH PORTS WITH ITEM 2)

1


HOUSING, 1 K SST, 1/4 X 1/2 NPT (TOP/BOTTOM) 9A-CS787-0060C


HOUSING, 1 K SST, 1/2 X 1/2 NPT 9A-CS787-0026Z


HOUSING, 3 K SST, 1/4 X 1/2 NPT (TOP/BOTTOM) 9A-CS787-0056Z



4 BOLT, HOUSING, 1 K 9A-C0199-1345C 12

BOLT, HOUSING, 3 K 9A-C0220-1116J

5 PLUG, PIPE, 1/4"NPT, 316 SST 9A-C0199-0214C 2

PLUG, PIPE, 1/2"NPT, 316 SST 9A-C0199-0215C

6 GASKET, PRESSURE HOUSING, NICKEL 9A-C0199-0184C 2

7 LABEL, HIGH PRESSURE 9A-0199-0194C 1

8 LABEL, LOW PRESSURE 9A-0199-0195C 1

9 BRACKET, MOUNTING, 1 K MODEL 200A/289A 9A-C0199-1493B 1

BRACKET, MOUNTING, 3 K MODEL 200A/289A 9A-CS787-0047Z

BRACKET, MOUNTING, 3 K MODEL 581A 9A-C0199-1109B

10 BRACKET, INDICATOR - MODEL 200A/289A 9A-CS748-0006Z 1

BRACKET, INDICATOR - MODEL 581A 9A-C0197-1019C

11 SPACER, INDICATOR BRACKET - MODEL 200A/289A 9A-C0199-0006C 2

12 SCREW, HEX WASHER HEAD, 3/8-16 X 1-1/8 9A-C0002-1009T 2

13 SCREW, HEX HD, 3/8-16 X 3/4 - MODEL 581A 9A-C0116-0007J 2

14 BRACKET SPACER 9A-C0199-0003C 1

A-32




15 SCREW, FL HEX SOC CAP HD 3/8-16 X 7/8, ST - MODEL 200A/289A

9A-C0240-0003J 1

SCREW, FL HEX SOC CAP HD 3/8-16 X 1 - MODEL 581A

9A-C0240-0004J

16 TAG, S/N, DPU MTG BRK - MODEL 200A/289A 9A-C0199-0002G 1

TAG, S/N, DPU MTG BRK - MODEL 581A 9A-C0224-0003G

17 DRIVE SCREW, RD HD, #0 X 3/16, SS - MODEL 200A/289A

9A-C0600-1003J 4

DRIVE SCREW, RD HD, #0 X 3/16, SS - MODEL 581A 2

18 SPACER, MOUNTING BRACKET - MODEL 200A/289A 9A-CS787-0008Z 2

19 WASHER, SPLIT LOCK, 3/8, SST 9A-C0003-0093K 5

20 SCREW, CAP HEX HD 3/8-16 X 1-1/2 ST ZP - MODEL 200A/289A

9A-C0210-0011J 2

21 SCREW, CAP HEX HD 3/8-16 X 1 ST ZP, 1 K - MODEL 200A/289A

9A-C0210-1007J 2

SCREW, CAP HEX HD 3/8-16 X 3/4 ST ZP, 3 K - MODEL 200A/289A

9A-C0210-0012J

SCREW, CAP HEX HD 3/8-16 X 3/4 ST ZP, 3 K - MODEL 581A

9A-C0116-0007J

22 SCREW, CAP HEX HD 3/8-16 X 1 ST ZP - MODEL 200A/289A

9A-C0210-1007J 1

SCREW, HEX HD, 3/8-16 X 1 - MODEL 581A 9A-C0116-0006J

23 SPACER, CENTER PLATE - MODEL 200A/289A 9A-CS787-0009Z 1

24 SPACER - BLACK EPOXY, 1 K - MODEL 200A/289A 9A-CS787-0006Z 2

25 SPRING PUSH ROD 9A-C0199-0049C 1

26 LOCK NUT, SPRING ADJUST 9A-C0199-0144C 1

27 SPRING RETAINER POST, ROUND, 10-19"WC 9A-C0199-0257C 8

SPRING RETAINER POST, HEX, 20-400"WC 9A-C0199-1337C

28 NUT, SPRING POST, 8-32, ROUND 9A-C0199-0258C 8

NUT, SPRING POST, 6-32, HEX 9A-C0500-0028J

29 SCREW, CALIBRATION SPRING RETAINER, RD HD, 6-32 X 5/16, SST

9A-C0111-0049J 8

30 CALIBRATION SPRING ASSEMBLY, 3-3/4 BELLOWS 1

SPRING ASSY, INC, 0 - 10" WC 9A-C0199-1385B







A-33

Model 199 Differential Pressure Unit Section 5



30 (cont.)

SPRING ASSY, INC, 23 - 27" WC 9A-C0199-1391B 1




























31 CALIBRATION SPRING ASSEMBLY, 2-1/8 BELLOWS 1

SPRING ASSY, INC, 0 - 15 PSI 9A-C0199-1400B








A-34




31 (cont.)

SPRING ASSY, INC, 0 - 40 PSI 9A-C0199-1429B 1









32 SCREW, SET, 6-32 X 1/4 - MODEL 581A 9A-C0320-1010J 1

Table 5.2 - Torque Requirements for 199 Diff erential Pressure Unit Fastners(See Figure 5.1 - Model 199 DPU Parts Drawing)

Item Description Part No.Per Unit

Torque* (Ib-ft)

4 BOLT, HOUSING, 1KBOLT, HOUSING, 3K

9A-C0220-1117J9A-C0220-1116J

12 40-4580

5 PLUG, PIPE, 1/4" NPT, 316 SSTPLUG, PIPE, 1/2" NPT, 316 SST

9A-C0199-0214C9A-C0199-0215C

2 60

12 SCREW, HEX WASHER HEAD 3/8-16 X 1-1/8

9A-C0002-1009T 2 TIGHT

13 SCREW, HEX HD, 3/8-16 X 3/7- MODEL 581A

9A-C0116-0007J 1 25-30

15 SCREW, FL HEX SOC CAP HD 3/8-16

X 7/8, ST - MODEL 200A/289A

9A-C0240-0003J 1 TIGHT

20 SCREW, CAP HEX HD 3/8-16 X 1-1/2ST ZP - MODEL 200A/289A

9A-C0210-0011J 2 25-30

21 SCREW, CAP HEX HD 3/8-16 X 1 ST ZP,1K - MODEL 200A/289ASCREW, CAP HEX HD 3/8-16 X 3/4 ST ZP, 3K - MODEL 200A/289A

9A-C0210-1007J

9A-C0210-0012J

2 25-30

22 SCREW, CAP HEX HD 3/8-16 X 1 STZP - MODEL 200A/289A

9A-C0210-1007J 1 25-30

*Tight denotes 1/8 (approx.) turn past head contact.

A-35


Section 6—Dimensional Drawings

Figure 6.1—Dimensional drawing, Model 199 DPU, rear view

Figure 6.2—Dimensional drawing, Model 199 DPU, side view

A-36


Table 6.1—Model 199 DPU DimensionsPressure Rating

psi (bar)Dim. A

inches (mm)Dim. B

inches (mm)Dim. C

inches (mm) # Bolts

1,000 (69) 6-5/8 (168.3) 2 (50.8) 2-9/64 (54.4) 12

3,000 (207) Ø 7 (177.8) 2 (50.8) 2-9/64 (54.4) 12

All Standard pipe fi ttings furnished by customer.(Metric conversions are approximate.)

Product Warranty

A. WarrantyCameron International Corporation (“Cameron”) warrants that at the time of shipment, the products manufactured by Cameron and sold hereunder will be free from defects in mate-rial and workmanship, and will conform to the specifi cations furnished by or approved by Cameron.

B. Warranty Adjustment1. If any defect within this warranty appears, Buyer shall notify Cameron immediately2. Cameron agrees to repair or furnish a replacement for, but not install, any product

which within one (1) year from the date of shipment by Cameron shall, upon test and examination by Cameron, prove defective within the above warranty.

3. No product will be accepted for return or replacement without the written authoriza-tion of Cameron. Upon such authorization, and in accordance with instructions by Cameron, the product will be returned shipping charges prepaid by Buyer. Replace-ments made under this warranty will be shipped prepaid.

C. Exclusions from Warranty1. THE FOREGOING WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER

EXPRESSED OR IMPLIED WARRANTIES OF MERCHANTABILITY, OR FIT-NESS FOR A PARTICULAR PURPOSE, OR OTHERWISE.

2. Components manufactured by any supplier other than Cameron shall bear only the warranty made by the manufacturer of that product, and Cameron assumes no respon-sibility for the performance or reliability of the unit as a whole.

3. “In no event shall Cameron be liable for indirect, incidental, or consequential dam-ages nor shall the liability of Cameron arising in connection with any products sold hereunder (whether such liability arises from a claim based on contract, warranty, tort, or otherwise) exceed the actual amount paid by Buyer to Cameron for the products delivered hereunder.”

4. The warranty does not extend to any product manufactured by Cameron which has been subjected to misuse, neglect, accident, improper installation or to use in violation of instructions furnished by Cameron.

5. The warranty does not extend to or apply to any unit which has been repaired or altered at any place other than at Cameron’s factory or service locations by persons not expressly approved by Cameron.

Product BrandBarton® is a registered trademark of Cameron International Corporation (“Cameron”).

RUSS IA

[email protected]

+603.5569.0501

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