Differential Presure Switches Series 101.121

1/20Registered Quality System to ISO 9001:2008Form 468sorinc.com

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Series 101/121Differential Pressure Switches

Form 468

are rugged, field-mounted instruments that incorporate a flexible modular design providing cost effective sensing solutions. The two-piece piston design allows for complete differential pressure reversal without damage. See Principle description on page 2.

Application InformationBasic models with standard wetted parts are normally suitable for air, oil, water and non-corrosive process fluids. See the Quick Selection Guide on page 4.

Corrosive service and special requirements may require optional components. See How to Order on page 3.

Series 101/121 differential pressure switches are suited for low-to-high differential pressure, fluid power or process applications where high and varying static pressures, high overrange, proof, shock pressure or cycle rates are expected.

101NN121NN

Series 101/121 differential pressure switches

101AG121AG

101L121L

Registered Quality System to ISO 9001:2008sorinc.com 913-888-2630

2/20 Registered Quality System to ISO 9001:2008Form 468 sorinc.com

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Fe

atu

res a

nd B

en

efits

Fh = Force, Hi Pressure

Fl = Force, Lo Pressure

Fs = Force, Range Spring

Fd = Force, Resultant Differential Fd = Fh - (Fl + Fs)

Process pressure is sensed by a diaphragm-piston combination. Hi-side system pressure acts on the piston to product force Fh. It is counteracted by the adjustable range spring force Fs and Lo-side system pressure acting on the backside of the piston to produce force Fl . The resultant force Fd acts on the piston and overcomes the force of the adjustable range spring [Fd = Fh – (Fl + Fs)] and moves a shaft that actuates (deactuates) an electrical switching element.

A

Fh

Fl

Fs

Fd

NCNO

C

Modular Design Wide range of electrical enclosures available.

Construction Rugged, high cycle rate tolerance, long life, not critical to vibration, high overrange and proof pressures, withstands full Hi and Lo side pressure reversals, excellent corrosion resistance to hostile environments.

Instrument Quality High repeatability, narrow dead band, negligible temperature effect and static influence.

Safety Certified to IEC 61508 (SIL) SOR products are certified to IEC 61508 for non-redundant use in SIL1 and SIL2 Safety Instrumented Systems

for most models. For more details or values applicable to a specific product, see the Safety Integrity Level Quick

Guide (Form 1528).

Delivery Routine shipments 7 to 10 working days. Emergency shipments via air same day.

Service Factory service engineers and area factory representatives provide effective and prompt worldwide service.

Wetted Parts Wide selection of materials.

Field Adjustable Excellent resolution of Set Points, adjustment, no special tools required. No-charge factory calibration.

Warranty 3 years from date of manufacture.

UL, CSA, ATEX, GOSTApproved Models Meets most code and customer

requirements.

Series 101/121 Differential Pressure Switch Principle


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Quick Selection GuideBasic Series 101/121 differential pressure switches with standard wetted parts are normally suitable for air, oil, water and non-corrosive processes. Refer to the Quick Selection Guide section on page 4. Corrosive service and particular customer requirements may require optional components. Refer to the How to Order section on this page or the dedicated page to locate optional components, such as: housings, switching elements, diaphragm systems, pressure ports and accessories. Each position in the model number, except Accessories, must have a designator.

101NN-K3-N4-C1A-YYModel Number System

Series Housing Diaphragm & O-Ring

Switching Element

Adjustable Range

Pressure Port Accessories

ApplicationsThe Series 101/121 differential pressure switches in this catalog are suitable for a wide variety of process and fluid power applications. Specific application requirements can normally be met by selecting optional components, such as, switching elements and diaphragm systems. Certain applications may require customized specials. Consult local representative or the factory.

Weathertight, conventional explosion proof and hermetically sealed explosion proof models are presented in this catalog.

How to OrderSteps 1 through 5 are required; Step 6 is optional. Orders must have complete model numbers, i.e. each component must have a designator.

Order information must include: a) Set Point (increasing or decreasing)

b) If decreasing Set Point, state from what greater Set Point is approached

c) Normal system (static) pressure

Step 1: Select Housing for type of service (pages 5 & 6).

Step 2: Select electrical Switching Element for housing and electrical service (pages 6 & 7).

Step 3: Select Adjustable Range according to Set Point (page 8).

Step 4: Select Diaphragm and O-Ring for process compatibility and containment (page 9).

Step 5: Select Pressure Port for process connection (page 9).

Step 6: Select Accessories as required for service (page 10).

If Agency Listed, Certified or Approved differential pressure switches are required, see page 11 for components that must be specified.

Series 101/121 Differential Pressure Switch How to Order


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Specify model number from table below.

Weathertight NEMA 4, 4X, IP65

Hazardous Locations Class I, Groups C & D;

Class II, Groups E, F & G; Divisions 1 & 2

Hazardous Locations Class I, Groups A, B, C & D;

Class II, Groups E, F & G; Divisions 1 & 2

Pressure Port 1/4” NPT(F)

Maximum Working Pressure 101 500 psi 121 1,000 psi

Wetted Materials Diaphragm Teflon-Coated Polyimide O-Ring Buna-N

Pressure Connection 316SS; CF-8M Cast Alloy

Product Specifications

Design and specifications are subject to change without notice. For latest revision, see www.sorinc.com.

Model Number Range (psid)

Typical Dead Band (psi)

Electrical Rating

Electrical Connection

Housing Material

101NN - K3 - N4 -C1A 3 to 30 0.5

15 amps250 VAC

3/4” NPT(F) Aluminum101NN - K45 - N4 - C1A 10 to 75 1.5

121NN - K45 - N4 - C1A 75 to 500 10

101L - K3 - N4 - C1A 3 to 30 0.5

15 amps250 VAC

3/4” NPT(F) Cast Iron101L - K45 - N4 - C1A 10 to 75 1.5

121L K45 - N4 - C1A 75 to 500 10

101AG - EF3 - N4 - C1A 3 to 30 1.0

15 amps250 VAC

1/2” NPT(M)

Aluminum101AG - EF45 - N4 - C1A 10 to 75 3.0

121AG - EF45 - N4 - C1A 75 to 500 20

Series 101/121 Differential Pressure Switch Principle


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Electrical: 3/4” NPT(F)-Right Material: Aluminum

See Agency Listings page 11.See Switching Element Groups 1, 2, 3, 4 page 6.

Electrical: 3/4” NPT(F)-Right Material: Aluminum NN See Agency Listings page 11.See Switching Element Groups 1, 2, 3, 4 page 6.

Contains UL Listed, CSA Certified, ATEX and SAA Approved hermetically sealed switching element.

Electrical: 1/2” NPT(M)-Top Material: Copper-free** aluminum AGSee Switching Element Group 5 page 6.

Electrical: 3/4” NPT(F)-Left, Right Material: Aluminum

See Switching Element Groups 1, 2, 3, 4 page 6.

Electrical: 3/4” NPT(F)-Left, Right Material: Aluminum N3See Agency Listings page 11.See Switching Element Groups 1, 2, 3, 4 page 6.

Electrical: Exposed Contacts Material: Aluminum Open bracket with exposed switching element does not meet NEMA 1.

See Switching Element Groups 1 & 3 page 6.

Electrical: 3/4” NPT(F)-Right Manual reset only Six-place compression type terminal block Material: Aluminum See Agency Listings page 11.See Switching Element Group 7 page 6.

General Purpose — NEMA 1

Weathertight —NEMA 4, 4X, IP65

Hazardous Locations —Hermetically Sealed Switches

See Agency Listings page 11.Switching Element Groups 1, 2, 3, 4, 5 page 6.

RB

PP

Electrical: 3/4” NPT(F)- Right Material: Aluminum Cover: heavy duty with Viton gasket N4See Agency Listings page 11.See Switching Element Groups 1, 2, 3, 4 page 6.

Electrical: 3/4” NPT(F)-Right Material: Carbon Steel N6See Switching Element Groups 1 & 3 page 6.

Electrical - RN: 3/4” NPT(F)-Right Electrical - RM: M20 x 1 .5 - Right Six-place compression type terminal block. Material: Aluminum See Agency Listings page 11. Switching Element Groups 1, 2, 3, 4, 5 page 6.

RNRM

Electrical-RT: 3/4” NPT(F)-Right Electrical-RS: M20 x 1.5-Right Six-place compression type terminal block Material: 316SS

RTRS

Contains UL Listed, CSA Certified and SAA Approved hermetically sealed switching elements.

Electrical: 3/4” NPT(F)-Top Material: Copper-free** aluminum Weathertight: NEMA 4/4X

*BASee Switching Element Group 6 page 6.

UL Listed Class I, Groups C & D; Class II, Groups E, F & G; Divisions 1 & 2 as an outlet box only.

Electrical: 3/4” NPT(F)-RightMaterial: Cast Iron Weathertight with Option CG

*L

UL Listed Class I, Groups C & D; Class II, Groups E, F & G; Divisions 1 & 2 as an outlet box only.Electrical: 3/4” NPT(F)-RightSix-place compression type terminal block with Option LL Material: Copper-free** aluminum Weathertight

*LC

101NN-K3-N4-C1A-YY

Separate electrical and set point adjustment compartments. Weathertight Six-place compression type terminal block UL Listed with WV option. ATEX Approved with CL option. CSA Certified with CS option.Multi-Listed with ML option. See page 11.

UL Listed Class I, Groups C & D; Class II, Groups E, F & G; Divisions 1 & 2 as an outlet box only.Electrical: 3/4” NPT(F)-Left, Right, TopMaterial: Cast Iron Weathertight with Option CG

*S

UL Listed Class I, Groups C & D; Class II, Groups E, F & G; Divisions 1 & 2 as an outlet box only.Electrical: 3/4” NPT(F)-Left, Right, TopSix-place compression type terminal block with Optional LL Material: Copper-free** aluminum Weathertight

*SC

Class I, Groups A, B, C, D; Class II, Groups E, F, G; Divisions 1 & 2 as an outlet box only. Electrical: 3/4” NPT(F)-Left, Right, Top Material (Housing): Aluminum Material (Cover): Aluminum Line Mounted. Weathertight with Option CG. *TA See Switching Element Groups 1 & 3 page 6.

*B3

*B4

Electrical: 3/4” NPT(F)-Left, Right Material: Aluminum

Electrical: M20 x 1.5, Left, Right Material: Aluminum

*B5

*B6

Electrical: M20 x 1.5, Left, Right Material: Cast Iron

Electrical: 3/4” NPT(F)-Left, Right Material: Cast Iron

Switching Element Groups 1, 2, 3, 4, 5 page 6.

* Not recommended for direct mount where vibration is expected. Housing should be securely mounted to a flat surface (bulkhead or panel rack) or pipe stanchion. ** Consult the factory.

See Switching Element Groups 1 & 3 page 6.See Switching Element Groups 1, 2, 3, 4 page 6.

See Switching Element Groups 1 , 3, 7 page 6. See Switching Element Groups 1, 2, 3, 4, 7 page 6.

Hazardous Locations — Conventional Explosion Proof

P3H3

Contains UL Listed, CSA Certified, ATEX and SAA Approved hermetically sealed switching element.

Electrical: 1/2” NPT(M)-Top

Material: 316SS AH See Switching Element Group 5 page 6.

Series 101/121 Differential Pressure Switch Step 1: Housing


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Switching Element Service

Electrical Contact

Type


Type

AC Rating DC Rating Resistive Dead Band Multiplier Designator

Volts Amps Volts Amps Volts Amps SPDT DPDT SPDT DPDT

Normal Service AC

250 15 125 .4* 30 5* 1 4 K KK

Low PowerGold Contacts

125 1 - - 28 1* 1 - KA N/A

125 1 - - 30 1 1.5 3.5 J JJ

Wide Dead Band AC 250 15 125 .5 - - 2 4 G GG

AC or DC 250 11 125 .5* 30 5 2 4 A AA

Wide Dead Band DC 250 15 - - 30 10* 2.5 4.5 L LL

Narrow Dead Band DC

250 5 125 .5* 30 5* 1.5 3 E EE

Very Wide Dead Band DC

250 15 125 .5 - - 3.5 - C N/A

Very High-Capacity DCMagnetic Blow-Out

125 10 125

1.5 Minimum

10Maximum

- - 3.5 - S N/A

Hi-Ambient Temperature Rating - 400°F

250 5 125 .3 - - 2 4 B BB

250 5 125 .5* - - 1.5 3.5 Y YY

250 5 125 .3* - - 1 - W N/A

Wide Adjustable Dead Band

250 15 125 .4* - -2.5 to 5

- T N/A

Narrow Adjustable Dead Band

250 15 - - - - 1 to 3 - H N/A

Manual Reset - Decreasing Pressure (Automatic Actuation Increasing Pressure)

250 15 125 .5 - - 1.5 -

D N/A

Manual Reset - Increasing Pressure (Automatic Actuation Decreasing Pressure)

M N/A

Corrosion Resistant Explosion Proof Hermetically Sealed Switching Element

250 15 125 .4* 30 5* 1.5 - KB N/A

250 5 125 .5* 30 5* - 3.5 N/A EB

250 11 125 .5 30 5 3 5 AF AG

250 5 125 .5* 30 5* 2 3.5 EF EG

Corrosion Resistant Explosion Proof Lower Power Service Hermetically Sealed Gold Contacts

125 1 - - 28 1* 1.5 - JR N/A

125 1 - - 30 1 - 4 N/A JB

125 1 - - 30 1 2.5 4 JF JG

ATEX Approved II 2 G EEx d IIC Microswitch Only

250 7 250 0.25 30 7 1 - BD N/A

Switching Element Group / Housing Compatibility

*C micro switch is not available in L, S, and TA housings

Group 2

GG, KK, LL, YY

Group 3

T

Group 4

H

Group 5

AF, AG, EF, EG, JF, JG

Group 6

EB, JB, JR, KB

Group 7

D, M

Group 1

A, AA, B, BB, C*, E, EE, G, J, JJ, K, KA,

L, S, W, Y

Step 2: Switching Element

Step 1:

Housing

101NN-K3-N4-C1A-YY

Cross reference compatibility chart above to ensure that switching element will fit in housing.

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SP

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-(1)

SP

DT

Dou

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DT

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SP

DT

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s ac

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deac

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at in

crea

sing

/dec

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ing

Set

Poi

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K, K

A, G

, L, C

, N, S

, Y, W

Sw

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ents

- S

crew

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All

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- 18

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G c

olor

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are

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ified

.

101NN-K3-N4-C1A-YY

Series 101/121 Differential Pressure Switch

Principle


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Notes1. AC/DC electrical ratings for switching elements K, KK, KA, J, JJ, G, GG, A, AA, L, LL, E, EE, C, S, B, BB, Y, YY, W, T, H, D and M are UL Recognized and CSA Certified with conditions and exceptions specified in Note 3.2. The hermetically sealed switching element capsule is UL Listed, CSA Certified, ATEX and TestSafe Approved as a snap switch in accordance with the following table with conditions and exceptions specified in Note 3.

3. DC electrical ratings are for resistive loads only. DC ratings marked with an asterisk (*) are not agency recognized or certified but have been verified by testing or experience.

Step 2:

Switching Element

101NN-K3-N4-C1A-YY

4. DPDT switching elements have wire leads except when supplied in housings RN, RT, RM, RS, RB, B3, B4, B5, B6.5. Switching element minimum/maximum ambient temperatures: -40 to 167oF (-40 to 75oC) AF, AG, EB, EF, EG, JB, JF, JG, JR, KB -65 to 400oF (-54 to 204oC) B, Y, W -65 to 250oF (-54 to 120oC) A, E, J -65 to 180oF (-54 to 80oC) All others6. Dead band multipliers must be applied to the typical dead band figures given in the specification tables on page 8.7. Switching elements B, W and Y have an Elgiloy spring. Experience indicates good service in atmospheres with corrosive gases - H2S, ammonia, etc.

Caution: The switching element assembly has been precisely positioned in the housing at the factory for optimum performance. Any inadver-tent movement or replacement in the field will degrade performance, could render the device inoperative and may void the warranty unless factory authorized procedures are followed.

Agency Hazardous Location Conditions Designator

UL ListedCSA Certified

Class I, Groups A, B, C & D; Class II, Groups E, F & G; Divisions 1 & 2

AF, EF, AG, EG, KB, EB, JB, JF,

JG, JR

TestSafe Approved

Ex s Zone 2 IIC T4 IP65Ex tD A22 T105°C IP65

AF, EF, AG, EG, KB, EB

ATEX Approved II 2 G EEx m IIAF, EF, AG, EG, JF, JG



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Step 3:

Adjustable Range

101NN-K3-N4-C1A-YY

This table lists designators for corresponding adjustable ranges, dead bands, maximum system pressure and maximum differential pressure. Adjustable range is expressed for increasing pressure: the Set Point must be within the adjustable range. Dead band is expressed as typical at mid-range. See dead band considerations at the bottom of this page.

Notes1. Ambient temperature range: -30 to 180oF (-34 to 80oC). Check restrictions, page 7, for optional electrical switching elements and page 9 for optional diaphragm systems.2. Metric bar (mbar) values are practical equivalents of the mathematical conversions. This data appears on the product nameplate when metric engineering units are specified.

3. Caution: When the process could be considered dirty in terms of suspended particles, it is recommended that 20-micron in-line filters be installed on the Hi and Lo pressure ports.

4. To achieve optimum performance, the 101/121 should be calibrated under simulated system operating conditions.

Dead Band Considerations

1. Dead band values are expressed as typical expected at mid-adjustable range and 50% maximum system pressure (static pressure) using the standard K switching element.2. Dead bands are fixed (non-adjustable), except when T or H switching elements are used.3. A dead band multiplier must be applied to the typical dead band value shown in adjustable range above whenever an optional switching element is specified.4. Dead band can be widened by selecting an optional switching element with a multiplier greater than 1.0.5. Use of metal diaphragms may have additional impact on Dead band values. Contact the factory for details.

Switching Element Designators

Dead Band Multiplier

K, KA, W 1.0

D, E, J, JR, KB, M, Y 1.5

A, B, EF, G 2.0

L, YY, JF 2.5

AF, EE 3.0

C, EB, EG, JJ, S 3.5

AA, BB, GG, JB, JG, KK 4.0

LL 4.5

AG 5.0

T (Adjustable) 2.5 to 5.0

H (Adjustable) 1.0 to 3.0

Series and 4th Designator (see example)

Adjustable Range(increasing pressure)

Typical Mid-Range Dead Band

Maximum System Pressure

Maximum DifferentialPressure

psid bar psi bar psi bar psid bar

101 - 3 3 to 30 .2 to 2.1 .5 .03500 34 500 34

101 - 45 10 to 75 .7 to 5.2 1.5 .10

121 - 45 75 to 500 5.2 to 34.5 10 .7 1000 69 1000 69


Example: Model 101NN-G3-N4-C1A Typical Dead Band 0.7 psid G-Switching Element muliplier 2 Corrected Typical Dead Band 0.7 x 2 = 1.4 psid


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Step 4:

Diaphragm & O-Ring

101NN-K3-N4-C1A-YY

Notes1. N4 diaphragm system is standard. It is normally suitable for air, oil, water and non-corrosive processes.2. Other diaphragm and o-ring combinations may be available. Consult the factory or the SOR representative in your area for more information.3. Wetted parts have been selected as representing the most suitable commercially available material for use in the service intended. However, they do not constitute a guarantee against corrosion or permeation, since processes vary from plant to plant and concentration of harmful fluids, gases or solids vary from time to time in a given process. Empirical experience by users should be the final guide. Alternate materials based on this are generally available.

4. Differential pressures exceeding 100 psid may affect Set Point when M2, M4, or H4 diaphragm and o-ring combination is used.5. Dead bands are higher when using metal diaphragm options. Consult the factory.6. This table shows allowable minimum and maximum temperatures for o-rings.

Step 5: Pressure Port

101NN-K3-N4-C1A-YY

Notes1. C1A pressure port is standard. It is normally suitable for air, oil, water and non-corrosive processes.

2. Other pressure port materials and connection sizes may be available. Consult the factory or the SOR representative in your area for more information.

Material & Systems

O-Ring (wetted)

Diaphragm (wetted primary) Designator

Viton Hastelloy-B H4

Buna-N316SS

M2

Viton M4

Viton TCP Teflon-Coated

Polyimide

N1

Buna-N N4 Standard

Viton Viton S1

O-Ring Material °F °C

Viton 32 to 400 0 to 204

Buna-N -32 to 200 -34 to 93

TCP-Teflon Coated Polyimide

Diaphragm-30 to 400 -34 to 204

Material Connection Size Designator

316SS; CF-8M Cast Alloy1/4” NPT(F) C1A

1/4” BSP(F) C1B



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Step 6: Accessories

101NN-K3-N4-C1A-YY

Representative Information Only: A slash and a three-digit number (/000) appearing after the last accessory designator letter in the model number denotes special administrative procedures with respect to factory representatives. It is not part of the model number and is used only by the factory or a factory representative.

Accessory/Option & Description Designator Wetted parts are cleaned for industrial oxygen service. BBATEX Approved differential pressure switch. See Agency Listings on page 11 for details. CLCSA Certified differential pressure switch. Available with PP, NN, RB, RN, RT, B3 and B6. Housing has earth (ground) lug. See Agency Listings on page 11 for details. CS

Neoprene cover gasket (o-ring) to make L, S and TA explosion proof housings weathertight. CGCanadian Registration Number (CRN) - Process ratings may be affected. Consult the factory for details. CVCSA Dual Seal Approval. See Agency Listings on page 11 for details DS

Cemented cover gasket on weathertight housings. GC

Sealed electrical lead adapter. Provides protection to housing interior, switching element and dry side of pressure sensing assembly from condensate in the electrical conduit and corrosive atmospheres. (Protrudes approximately 2” from housing.) GG

Breather Drain

Crouse Hinds ECD-15 for Hazardous Locations Class I, Groups C & D, Class II, Groups E, F & G; on S or SC housings only.KK

Sintered metal plug in weathertight housing.

Terminal block. 6-place compression type standard in B and R series housings. Optional in LC and SC housings. LLMulti-Listed differential pressure switch. ATEX, CSA & UL. Available with B3 & B6 housings. See Agency Listings on page 11 for details. MLPipe (stanchion) mounting kit for (1-1/2 to 2” pipe). Order as a separate line item for UL Listed and CSA Certified pressure switches. PKTag, fiber. Attached with plastic wire to housing. Stamped with customer specified tagging information. PPPowder coat epoxy coating. No coating on stainless steel parts or plated screws. (500 hours-salt spray) PYTag, stainless steel. Attached with stainless steel wire to housing. Stamped with customer specified tagging information. (2 lines, 18 characters and spaces per line.) RR

Stainless steel body, force transmitter and adjusting nut for corrosive environments. Standard on stainless steel housings. SBExplosion proof weathertight electrical junction box with screw terminals. Aluminum 3/4” NPT(F) top or right conduit connections as required. UL Listed and CSA Certified Class I, Groups A, B, C & D; Class II, Groups E, F & G; Divisions 1 & 2. (L, LC, S, SC and TA housing.) Includes cover o-ring for weathertight applications.

TB

Oversize stainless steel nameplate or separate stainless steel tag. Permanently attached to housing. Stamped with customer specified tagging information. TT

Fungicidal varnish. Covers exterior and interior except working parts. VVUL Listed differential pressure switch. Available with B3 and B6 housings. See Agency Listings on page 11 for details. WV“X” is used as a suffix to the model number for special requirements not keyed elsewhere in the model number by an “X”. Each “X” must by completely identified in the text of the order or inquiry. When more than one “X” is required, use “X” followed by the number of such items. For example, “X3” means three separate otherwise unidentifiable requirements.

X

Epoxy coating. Exterior only. Polyamide epoxy with 316SS pigment (200 hours-salt spray). YYChained cover with captive screws to conform to former JIC specification. ZZ


Test CertificatesCertificates C1 C2 C3 C4 C5 C6 C8 B1 B4 B5 B6 B7 A1 A2 A3 A4 A5 A6 A7 A8

Calibration ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿

Hydrostatic Pressure Test ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿

Inspection Report ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿

Compliance / Conformance ¿ ¿ ¿ ¿ ¿ ¿ ¿

Dielectric Test ¿ ¿ ¿ ¿

Insulation Resistance ¿ ¿ ¿ ¿ ¿ ¿ ¿

Typical Material of Wetted Parts ¿ ¿ ¿ ¿ ¿ ¿


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Agency Listings

UL

CSA

ATEX

For Hazardous Locations Class I Groups B, C, D; Class II, Groups E, F, G; Divisions 1 & 2

Piston Housing Switching Element Spring Diaphragm & O-Ring

Pressure Port Material &

Connection SizeAccessories

ALL B3, B6

A, AA, AF, AG, B, BB, C, E, EE, EF, EG, G, GG, H,

J, JF, JG, JJ, K, KA, KK, L, LL, P, S, T, W, Y, YY

ALL ALL ALL

WV or ML Required

All except CG, GC, GG, HB, HT,

KK, LL, ME, TB, ZZ

For Hazardous Locations Class I, Groups A, B, C, D; Class II, Groups E, F, G; Divisions 1 & 2



Connection SizeAccessory

ALL B3, B6



ALL ALL ALL

CS or ML Required

All except CG, GC, GG, HB, HT,

KK, LL, ME, TB, ZZ

For General Purpose and Weathertight (CSA Enclosed 4)

101

PP (General Purpose)

A, AA, B, BB, C, E, EE, G, GG, GA, H, J, JJ, JL, K, KK, KA, L, LL, N, S, T,

W, Y, YY

ALL ALL ALL

CS Required

NN (Enclosed 4), N6

All except GC, LL

RN (Enclosed 4)RM, RT, RS

A, AA, AF, AG, B, BB, C, E, EE, EF, EG, G, GG,

GA, H, J, JJ, JL, JF, JG, K, KK, KA, L, LL, N, S, T, W,

Y, YY

RB (Enclosed 4)

D, DA, M (Manual Reset only)

For Dual Seal Approval

ALL AG, AH AF, AG, EF, EG, JF, JG ALL M2, M4, N4 C1A, C2ADS Required

CV, PP, RR, TT, YY

EEx d IIC T6/T5



Connection SizeAccessory

ALLB3, B4,B5, B6



ALL ALL ALL

CL (for all Hsgs) or ML (for B3/B6 Hsgs) Required

All except CG, GC, GG, HB,

HT, KK, LL, ME, TB, ZZ

ALLRN, RM, RT,

RSJ, JJ, JF, JG ALL ALL ALL CL


Ex ia IIC T6...T4 Gb


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Manual Reset

101RB-D3-N4-C1A-YYSeries 101/121 Differential Pressure Switches in this catalog may be specified with manual reset electrical switching elements D or M. D actuates automatically on increasing pressure. M actuates automatically on decreasing pressure. Depress the button, covered by the weathertight boot to manually reset. Housings must be RB weathertight or S explosion proof because of the requirement of a hub for the manual reset assembly. Refer to page 3 for order instructions.

Approximate Weights

Actual shipping weights may vary from the charted values because of product material, configuration and packaging requirements.

RB-Weathertight S-Explosion Proof

Housing Weight (lbs.) (kgs)

AG, H3 2.5 1.25

AH, NN, N3, N4, PP, P3 3 1.5

RM, RN 3.5 1.75

BA, N6, RB 4 2

RT 4.5 2.25

L, LC, SC 5 2.5

TA 5.5 2.75

B3. B4 9 4.5

B5, B6 11 5.5

Accessory Add (lbs.) (kgs)

PK Pipe Kit 1.5 0.7

TB Junction Box with Terminal Block

5 2.25



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SOR recognizes that there is no industry convention with respect to terminology and definitions pertinent to pressure switches. This glossary applies to SOR Pressure Switches.

Adjustable Range The span of pressure between upper and lower limits within which the pressure switch may be adjusted to actuate/deactuate. It is expressed for increasing differential pressure.

Dead Band The difference in pressure between the increasing Set Point and the decreasing Set Point. It is expressed as “typical,” which is an average with the increasing Set Point at mid- adjustable range for a pressure switch with the standard K switching element. It is normally fixed (nonadjustable).

Differential Pressure SwitchA bi-stable electromechanical device that actuates/deactuates one or more electrical switching element(s) at a predetermined discrete differential pressure (Set Point) upon rising or falling differential pressure.

DPDT Switching ElementDPDT is two synchronized SPDT switching elements that actuate together at increasing Set Point and deactuate together at decreasing Set Point. Discrete SPDT switching elements allow two independent circuits to be switched; i.e., one AC and one DC.

The synchronization linkage is factory set, and is not field adjustable. Synchronization is verified by connecting test lamps to the switching elements and observing them go“On” simultaneously at actuation and “Off” simultaneously at deactuation

Hermetically Sealed A welded steel capsule with glass-to-metal, factory-sealed, electrical leads that isolates the electrical switching element(s) from the environment.

Maximum Differential PressureThe maximum difference in pressure that may be continuously applied between the Hi and Lo (Lo and Hi) pressure ports without causing permanent change of Set Point, leakage or material failure.

OverrangeThe maximum input pressure that may be continuously applied to the pressure switch without causing permanent change of Set Point, leakage or material failure.

Proof PressureThe maximum input pressure that may be continuously applied to the pressure switch without causing leakage or catastrophic material failure. Permanent change of Set Points may occur, or the device may be rendered inoperative.

RepeatabilityThe ability of a pressure switch to successively operate at a Set Point that is approached from a starting point in the same direction and returns to the starting point over three consecutive cycles to establish a pressure profile. The closeness of the measured Set Point values is normally expressed as a percentage of full scale (maximum adjustable range pressure).

Set PointThat discrete pressure at which the pressure switch is adjusted to actuate/deactuate on rising or falling pressure. It must fall within the adjustable range and be called out as increasing or decreasing differential pressure.

SPDT Switching Element Single-Pole, Double Throw (SPDT) has three connections: C — Common, NO — Normally Open and NC — Normally Closed, which allows the switching element to be electrically connected to the circuit in either NO or NC state.

Glossary of Terms



913-888-2630

ISO-9001

14685 W 105TH ST LENEXA, KS 66215 USA913-888-2630SORINC.COM

ATYP

7.10.28

40.51.59

26.11.03

28.61.13

** 56.52.22

60.32.38

28.61.13

61.92.44

154.16.07

38.11.50

108.14.25

69.92.75

52.42.06

33.31.31

PROCESSCONNECTION SIZE LENGTH A

1/4 NPTMSHOWN

29.71.17

1/2 NPTF 37.61.48

1/2 NPTM 34.81.37

3/4 NPTF 39.91.57

HOUSINGGROUP ** DIMENSION

NN & N3 SHOWN

N4 4.6ADD 0.18

PP & P3 1.5SUBTRACT 0.06

Model Name: 0090602.ASSEM/2/2

PRODUCT CERTIFICATION DRAWINGALL DIMENSIONS ARE ±1/16 INUNLESS OTHERWISE SPECIFIED

MMLINEAR = IN

DRAWN BY

K MITCHELLCHECKED BY

J REHMENGINEER APPROVAL

J MODIGDATE

10 OCT 2011THIS DRAWING IS THE EXCLUSIVE PROPERTY OF SOR.

NO USE WHATSOEVER OF THE INFORMATION CONTAINEDHEREON, NOR REPRODUCTION IN WHOLE OR PART MAY BE

MADE WITHOUT THE EXPRESS WRITTEN PERMISSION OF SOR.

TITLE

DIMENSION DRAWING 101/121NN, N3, N4, PP & P3

EO NUMBER: 5123

SCALE: 1.00

DO NOT SCALE PRINT

DRAWING NUMBER REV

0090602 3

SHEET 1 OF 1DWG SIZE

B

MODEL # SALES ORDER # LINE ITEM # PURCHASE ORDER #SALES PAGE

CLEARANCE SLOTS

FOR 6.40.25 HARDWARE WITH

63.52.50 MIN TO 76.2

3.00 MAX

MOUNTING CENTERS

1/4 NPTF HI SIDEPROCESS CONNECTION

1/4 NPTF LO SIDEPROCESS CONNECTION

ELECTRICALCONNECTION3/4 NPTF STD1/2 NPTF OPT

(BOTH SIDES ONN3 & P3 HSGS)

1

Reset Form

Series 101/121 Differential Pressure Switch Dimensions

Dimensions in this catalog are for reference only. They may be changed without notice. Contact the factory for certified drawings for a particular model number. Dimensions are expressed as millimeters over inches (Linear = mm/in.)

Housing: N6

Weathertight - Nonhazardous Service (NEMA 4, 4X IP65)

Housing: NN, N3, N4

Drawing 0090603

Drawing 0090602


913-888-2630

ISO-9001


28.61.12

26.21.03

65.62.58

7.10.28

28.61.13

61.92.44

179.17.05

29.71.17TYP

38.11.50

52.02.05

107.34.22

33.31.31

69.92.75

CLEARANCE SLOTS

FOR 6.40.25 HARDWARE

WITH 63.52.50 MIN TO 76.2

3.00 MAX

MOUNTING CENTERS

ELECTRICALCONNECTION

SEE CHART

40.51.59

Model Name: 0090605.ASSEM/3/3+


MMLINEAR = IN

DRAWN BY


M SMITHENGINEER APPROVAL

S BOALDATE




TITLE

DIMENSION DRAWING 101/121 R-SERIES HOUSING

EO NUMBER: 5123

SCALE: 0.85

DO NOT SCALE PRINT

DRAWING NUMBER REV

0090605 4


B


HOUSING ELECTRICALCONNECTION

RL3/4 NPTF STD1/2 NPTF OPT

LH & RH

RM M20 X 1.5 FRH ONLY

RN3/4 NPTF STD1/2 NPTF OPT

RH ONLY

RS M20 X 1.5 FRH ONLY

RT3/4 NPTF STD1/2 NPTF OPT

RH ONLY

RU3/4 NPTF STD1/2 NPTF OPT

LH & RH

RW M20 X 1.5 FLH & RH

RY M20 X 1.5 FLH & RH

1/4 NPTMPROCESSCONNECTIONOPTIONAL

1/4 NPTFHI SIDE

PROCESSCONNECTION

1/4 NPTFLO SIDEPROCESSCONNECTION

1

Reset Form

Series 101/121Differential Pressure Switch Dimensions


Housing: RB Manual Reset

Housing: RM, RN, RS, RT

Weathertight - Non-hazardous Service (NEMA 4, 4X IP65)

Drawing 0090604

Drawing 0090605


913-888-2630

ISO-9001


ATYP

7.10.28

40.51.59

26.11.03

28.61.13

** 56.52.22

60.32.38

28.61.13

61.92.44

154.16.07

38.11.50

108.14.25

69.92.75

52.42.06

33.31.31

PROCESSCONNECTION SIZE LENGTH A

1/4 NPTMSHOWN

29.71.17

1/2 NPTF 37.61.48

1/2 NPTM 34.81.37

3/4 NPTF 39.91.57

HOUSINGGROUP ** DIMENSION

NN & N3 SHOWN

N4 4.6ADD 0.18

PP & P3 1.5SUBTRACT 0.06



MMLINEAR = IN

DRAWN BY



J MODIGDATE




TITLE

DIMENSION DRAWING 101/121NN, N3, N4, PP & P3

EO NUMBER: 5123

SCALE: 1.00

DO NOT SCALE PRINT

DRAWING NUMBER REV

0090602 3


B


CLEARANCE SLOTS

FOR 6.40.25 HARDWARE WITH

63.52.50 MIN TO 76.2

3.00 MAX

MOUNTING CENTERS




(BOTH SIDES ONN3 & P3 HSGS)

1

Reset Form



Housing: H3 Open Bracket

General Purpose - Non-hazardous Service

Housing: PP, P3 NEMA 1

Drawing 0090601

Drawing 0090602


913-888-2630



Housing: L

Housing: LC

Conventional Explosion Proof - Hazardous ServiceClass I, Group C, D; Class II, Group E, F, G: Divisions 1 & 2

Drawing 0090606

Drawing 0091068

ISO-9001


149.55.88

71.42.81

8.70.34

34.01.34

106.44.19

108.04.25(TYP)

54.02.13(TYP)

72.32.85

126.24.97

207.48.17

A(TYP) 38.1

1.50

28.61.13

MOUNTING

HOLE (TYP 4)

7.10.28


3/4 NPT(F)(STD)1/2 NPT(F)(OPT)



MMLINEAR = IN

DRAWN BY

M SMITHCHECKED BY


S BOALDATE

3/10/11THIS DRAWING IS THE EXCLUSIVE PROPERTY OF SOR.



TITLE

DIM DWG 101/121 LC

EO NUMBER: 5090

SCALE: 0.50

DO NOT SCALE PRINT

DRAWING NUMBER REV

0091068 3


B

MODEL # SALES ORDER # LINE ITEM # PURCHASE ORDER #

LENGTH A29.71/4 NPT(M) = (SHOWN)1.17

37.61/2 NPT(F) = 1.48

34.8 1/2 NPT(M) = 1.37

39.9 3/4 NPT(F) = 1.57

1/4 NPT(F) HI SIDEPROCESS CONNECTION

1/4 NPT(F) LO SIDEPROCESS CONNECTION

Reset Form

ISO-9001


149.55.88

71.42.81

8.70.34

34.01.34

106.44.19

108.04.25(TYP)

54.02.13(TYP)

72.32.85

126.24.97

207.48.17

A(TYP) 38.1

1.50

28.61.13

MOUNTING

HOLE (TYP 4)

7.10.28





MMLINEAR = IN

DRAWN BY

M SMITHCHECKED BY


S BOALDATE




TITLE

DIM DWG 101/121 LC

EO NUMBER: 5090

SCALE: 0.50

DO NOT SCALE PRINT

DRAWING NUMBER REV

0091068 3


B



37.61/2 NPT(F) = 1.48

34.8 1/2 NPT(M) = 1.37

39.9 3/4 NPT(F) = 1.57



Reset Form


913-888-2630

Housing: S

Housing: SC



Conventional Explosion Proof - Hazardous ServiceClass I, Group C, D; Class II, Group E, F, G: Divisions 1 & 2

Drawing 0090607

Drawing 0090609

ISO-9001


54.02.13(TYP)

142.95.63

71.42.81

8.70.34

34.01.34

106.44.19

28.61.13

38.11.50

A(TYP)

72.32.85

126.24.97

197.77.78

108.04.25(TYP)

MOUNTING

HOLE (TYP 4)

7.10.28



OR PLUGGED(OPT)(TYP 3)



MMLINEAR = IN

DRAWN BY

M SMITHCHECKED BY


S BOALDATE




TITLE

DIM DWG 101/121 SC

EO NUMBER: 5090

SCALE: 0.50

DO NOT SCALE PRINT

DRAWING NUMBER REV

0090609 3


B



37.61/2 NPT(F) = 1.48

34.8 1/2 NPT(M) = 1.37

39.9 3/4 NPT(F) = 1.57



Reset Form

ISO-9001


54.02.13(TYP)

142.95.63

71.42.81

8.70.34

34.01.34

106.44.19

28.61.13

38.11.50

A(TYP)

72.32.85

126.24.97

197.77.78

108.04.25(TYP)

MOUNTING

HOLE (TYP 4)

7.10.28



OR PLUGGED(OPT)(TYP 3)



MMLINEAR = IN

DRAWN BY

M SMITHCHECKED BY


S BOALDATE




TITLE

DIM DWG 101/121 SC

EO NUMBER: 5090

SCALE: 0.50

DO NOT SCALE PRINT

DRAWING NUMBER REV

0090609 3


B



37.61/2 NPT(F) = 1.48

34.8 1/2 NPT(M) = 1.37

39.9 3/4 NPT(F) = 1.57



Reset Form


913-888-2630

Conventional Explosion Proof - Hazardous ServiceClass I, Groups C, D; Class II, Groups E, F, G: Divisions 1 & 2

Housing: B3, B4, B5, B6Class I, Groups B, C, D; Class II, Groups E, F, G; Divisions 1 & 2

Housing: TAClass I, Groups A, B, C, D; Class II, Groups E, F, G; Divisions 1 & 2


Dimensions in this catalog are for reference only. They may be changed without notice. Contact the factory for certified drawings for a particular model number. Dimensions are expressed as millimeters over inches (Linear = mm/in.).

Drawing 0090610

ISO-9001


127.15.00

232.29.14

29.71.17TYP

9.50.38

35.31.39

110.34.34

26.61.05

33.41.32

28.61.13

38.11.50

41.21.62

40.01.58

80.03.15

75.12.95

150.15.91

CLEARANCE

FOR 6.40.25

MOUNTINGHARDWARE

1/4 NPTFVENT CONNECTION

LH & RH


SEE CHART



MMLINEAR = IN

DRAWN BY



S BOALDATE

24 JUN 2011THIS DRAWING IS THE EXCLUSIVE PROPERTY OF SOR.



TITLE

DIMENSION DRAWING101/121 B & J

EO NUMBER: 4441

SCALE: 0.69

DO NOT SCALE PRINT

DRAWING NUMBER REV

0090610 5


B


HOUSING ELECTRICALCONNECTION

B3 & B63/4 NPTF STD1/2 NPTF OPT

LH & RH

B4 & B5 M20 X 1.5 FLH & RH

J4 3/4 PFFRH ONLY

1/4 NPTFHI SIDE

PROCESSCONNECTION

1/4 NPTFLO SIDE

PROCESSCONNECTION

1/4 NPTMPROCESSCONNECTIONOPTIONAL

1

Reset Form

Drawing 0090611


913-888-2630

ISO-9001


7.10.28

37.41.47

54.72.15

84.93.34

38.11.50

28.61.13

60.52.38

121.04.77

54.02.13

108.04.25

82.33.24

215.98.50

ATYP



MMLINEAR = IN

DRAWN BY



S BOALDATE

14 SEP 2011THIS DRAWING IS THE EXCLUSIVE PROPERTY OF SOR.



TITLE

DIMENSION DRAWING101/121 BA

EO NUMBER: 5095

SCALE: 0.70

DO NOT SCALE PRINT

DRAWING NUMBER REV

0090612 5


B


PROCESSCONN SIZE LENGTH A

1/4 NPTMSHOWN

29.71.17

1/2 NPTF 37.61.48

1/2 NPTM 34.81.37

3/4 NPTF 39.91.57

41.6ADD FOR M20 X 1.5 F1.64ELECTRICAL CONNECTION

CLEARANCE

FOR 6.40.25

MOUNTINGHARDWARE

1/4 OR 1/2 NPTMPROCESS CONNECTIONOPTIONAL


M20 X 1.5 F OPT

FACTORY SEALED LEADSCOLOR CODED AND MARKED

457.218.00 MINIMUM LENGTH



1

1

1

Reset Form

14685 West 105th Street, Lenexa, Kansas 66215 913-888-2630 Toll Free 800-676-6794 sorinc.com

Form 468 (07.12) ©2012 SOR Inc.

Hermetically Sealed Explosion Proof - Hazardous ServiceClass I, Groups A, B, C, D; Class II, Groups E, F, G; Divisions 1 & 2

Housing: BA

Housing: AG, AH



Drawing 0090612

Drawing 0091067


913-888-2630

Adjustable Dead Band Pressure Switches

Form 281

The adjustable dead bandpressure switch should be used when there is a

requirement for an adjustable and wide dead band between the increasing and decreasing set points.

FunctionAlarm: Hi — Lo

Control: On — Off

V1 Weathertight Housing

Featu

res a

nd B

en

efits

• 3-year warranty from date of manufacture

• Safety Certified to IEC 61508 (SIL) SOR products are certified to IEC 61508 for non-redundant use in SIL1 and SIL2 Safety Instrumented Systems for most models. For more details or values applicable to a specific product, see the Safety Integrity Level Quick Guide (Form 1528).

• Wide adjustable dead band

• Independent adjustments for increasing and decreasing Set Points

• Field adjustable with fine resolution of Set Points

• Instrument quality — high repeatability

• High overrange and proof pressures

• Exceptionally long life

• Not critical to vibration

• Wide selection of wetted parts materials for process compatibility and containment

Design and specifications are subject to change without notice.

For latest revision, see www.sorinc.com.

V3 Weathertight Explosion Proof Hermetically Sealed Switches

Registered Quality System to ISO 9001:2008 913-888-2630Form 281sorinc.com

http://www.sorinc.com/docs/1528_SIL%20Quick%20Guide.pdf


913-888-2630

The SOR Adjustable Dead Band pressure switch incorporates two industry proven Static “O” Ring pressure sensing elements. Media pressure on the areas of the pistons counteracts the forces of the range springs — each adjustable by a separate adjusting nut — and moves the piston shafts to operate the lever assembly which, in turn, actuates and deactuates the electrical switching element. Each pressure sensing element of the Adjustable Dead Band pressure switch is a force balance piston-actuated assembly sealed by a flexible diaphragm and an o-ring that is static. The only wetted parts are the single pressure port, two diaphragms, and two o-rings all indicated with asterisks (*) in this illustration.

Principle


No Pressure: Electrical switching element is deactuated.

Pressure greater than decreasing Set Point but less than increasing Set Point. Electrical switching element remains deactuacted.

Pressure equal to or greater than increasing Set Point: Electrical switching element is actuated.

Pressure less than increasing Set Point but greater than decreasing Set Point: Electrical switching element remains actuated.

Pressure equal to or less than decreasing Set Point: Electrical switching element is deactuated.

*Pressure Port

Principle SchematicThe lever assembly travel illustrated here has been exaggerated for clarity.

Screw Terminal Block (Weathertight Model Only)

Lever Assembly

Calibration Scale

Decreasing Set Point Adjusting Nut

Piston Assembly

Pressure Range Spring

*Diaphragm

*O-Ring

*O-Ring

*Diaphragm

Pressure Range Spring

Piston Assembly

Housing

Increasing Set PointAdjusting Nut

Calibration Scale

Electrical Switching Element (Explosion Proof

Model has Hermetically Sealed Switching Element

Capsule)

Actuation Deactuation


913-888-2630

How to Order


5V1-LA3-N6-C1A-YYModel Number System

Housing DiaphragmSwitching Element

Pressure Port Accessories

How to OrderInformation and data in this catalog are formatted to provide a convenient guide to assist instrument engineers, plant engineers and end users in selecting pressure switches for their unique applications.

Steps 1 through 5 are required. Step 6 is optional. Orders must have complete model numbers, i.e. each component must have a designator.

Step 1: Select Adjustable Range from pages 4, 5 and 6 to fill in and .

Step 2: Select Housing. Weathertight or explosion proof/weathertight (page 6).

Step 3: Select electrical Switching Element for electrical service (page 7).

Step 4: Select Diaphragm and O-Ring for process compatibility and containment (page 8).

Step 5: Select Pressure Port for process compatibility and connection (page 9).

Step 6: Select Accessories required for service (page 9).

If Agency Approved, Certified or Listed pressure switches are required, see page 10 for components that must be specified.


913-888-2630

Six adjustable dead band ranges are available. Each adjustable range is displayed on a grid (pages 5 and 6). Determine the correct adjustable range for the application by checking increasing and decreasing Set Point requirements against the tables. In the example below, a contact closure is required when pressure increases to 160 psi. The same contact must open when pressure decreases to 60 psi. Since 60 psi is within the blue field, the example grid range is correct for the application.

When the correct range grid is selected, insert range designators and from that grid into the model number.

Step 1Find the specified increasing Set Point at the top of the graph.

Adjustable Dead Band Pressure Switches Step 1: Adjustable Range

5V1-LA3-N6-C1A-YY

5V1-LA3-N6-C1A-YY

Step 2Find the specified decreasing Set Point along the left edge of the graph.

Step 3 Following the vertical line down from the increasing Set Point. Follow the horizontal line across from the decreasing Set Point. Any point within the blue field is acceptable.

1st and 4th places in model number

1 25 30

20

40

80

120

160

20080 100 120 160 200

Dec

reas

ing

Set

Poi

nt (p

si)

240

Increasing Set Point (psi)

5 - 3


913-888-2630


25

0

2

40

80

22 5 9 13 17

1 2

Dec

reas

ing

Set

Poi

nt (p

si)

0

50

100

200

300

150 200 250 350

Overrange 2500 psi 170 barProof 3875 psi 267 bar

1 2



4 4

21

18

14

10

6

9 4


Dec

reas

ing

Set

Poi

nt (p

si)

5V1-LA3-N6-C1A-YY

450350

100

0

10

20

40

60

8020 30 40 60 80

1 2

Dec

reas

ing

Set

Poi

nt (p

si)

6 3



1 25 30

20

40

80

120

160

20080 100 120 160 200

Dec

reas

ing

Set

Poi

nt (p

si)

240


5 - 3Overrange 1500 psi 100 barProof 2500 psi 170 bar


913-888-2630

0

100

200

400

600

800300 400 600 800

1 2

Dec

reas

ing

Set

Poi

nt (p

si)

1000


9 50

100200300

600

900

600 900 1200 1500

1 2D

ecre

asin

g S

et P

oint

(psi

)

1750


9 45

1200

1500


Step 2: Housing

5V1-LA3-N6-C1A-YY

Service Description Designator

Non-Hazardous Locations

Hazardous Locations

(UL Listed/CSA Certified,ATEX and SAA Approved

Snap Switch)

Weathertight for non-hazardous service. NEMA 4, 4X & IP65Electrical conduit connection: 3/4” NPT(F)Material: 356 aluminumUse LA or SA switching element and terminal block.Shipping weight: 4 pounds (2 kgs)See cutaway view on page 2; dimensions on page 14.

V1

Explosion proof and weathertight. NEMA 4, 4X & IP65. Class I, Group A, B, C, D; Class II, Group E, F, G; Division 1 & 2Electrical conduit connection: 3/4” NPT(F)Material: 356 aluminumUse AG switching element; hermetically sealed SS capsuleShipping weight: 5 pounds (2.5 kgs)

V3



5V1-LA3-N6-C1A-YY


913-888-2630

Adjustable Dead Band Pressure Switches Step 3: Switching Elements

5V1-LA3-N6-C1A-YY

1. The switching elements shown above are UL Listed and CSA Certified. The DC current rating marked (*) is not UL Listed but has been verified by testing and/or experienced.

2. The hermetically sealed switching element capsule is UL Listed, CSA Certified and SAA Approved as a snap switch in accordance with the following table.

3. Consult the factory for availability of SAA Approved units.

Agency Hazardous Location Conditions Designator

UL Listed Class I, Group A, B, C, D;Class II, Group #, F, G;Division 1 & 2

AG

CSA Certified

SAA Note 3

ApprovedEx s Zone 2 IIC T4 IP65Ex tD A22 T105 °C IP65

ATEX Approved II 2 G EEx m II

Switching Element Service

Contact Form


Type

AC Rating DC Rating ResistiveMaximum Ambient

TemperatureDesignator

Volts Amps Volts Amps Volts Amps Deg F Deg C SPDT DPDT

Normal Service AC

SPDTScrew

Terminal Block

250 15 125 .5 30 10* 180 80 LA N/A

Very High Capacity

DC Magnetic Blow-out

125 10 125

1.5 Min.10.0 Max.

- - 180 80 SA N/A

AC or DC DPDT

18” 18 AWG color-coded wire leads

3/4” NPT(M) conduit

connection

250 11 125 .5* 30 5.0 160 70 N/A AG


913-888-2630

Adjustable Dead Band Pressure Switches Step 4: Diaphragm and O-Ring

5V1-LA3-N6-C1A-YY

Notes1. N4 diaphragm system is standard. It is

normally suitable for air, oil, water and non-corrosive processes.

2. Other diaphragm and o-ring combinations may be available. Consult the factory or the SOR representative in your area for more information.

3. Wetted parts have been selected as repre-senting the most suitable commercially

available material for use in the service intended. However, they do not constitute a guarantee against corrosion or permeation, since processes vary form plant to plant and concentration of harmful fluids, gases or

solids vary from time to time in a given process. Emperical experience by users

should be the final guide. Alternate materials based on this are generally available.

4. Specify N3 diaphragm system for high cycle rate, high shock applications where Buna-N and TCP are compatible with the process.

5. This table shows allowable minimum and maximum temperature for o-rings.

O-Ring (Wetted)

Diaphragm (Wetted) Designator

VitonMonel

A4

Kalrez A6

VitonHastelloy-B

H4

Kalrez H6

VitonHastelloy-C

J4

Kalrez J6

VitonCarpenter-20

L4

Kalrez L6

Viton GLT

316L SS

M1

Buna-N M2

Viton M4

Neoprene M5

Kalrez M7

Aflas M8

EPR M9 Note 6

Viton

TCP Teflon-Coated

Polyimide

N1

Buna-N N3 Note 4

Buna-N N4 Standard Note 1

Kalrez N5

Kalrez Kalrez N6

EPR TCP Teflon-Coated

Polyimide

N7

Aflas N8

Buna-N Buna-N P1

Neoprene Neoprene R1

VitonViton

S1

Viton GLT S2

Buna-N

Tantalum

W2

Viton W4

Neoprene W5

Kalrez W6

EPREthylene

Propylene

EPREthylene Propylene

Y1

O-Ring Material ° F ° C

Viton 32 to 400 0 to 204

Viton GLT -20 to 400 -29 to 204

Kalrez* 5 to 400 -15 to 204

Aflas 25 to 400 -4 to 204

Buna-N Neoprene EPR

-30 to 200 -34 to 93

TCP Teflon CoatedPolyimide

Diaphragm-30 to 400 -34 to 204

*Kalrez or equivalent Perfluoroelastomer (FFKM) o-rings

6. M9 diaphragm system is suggested for steam applications up to 400oF.

7. Dead bands are slightly higher when using H, J, W, N3, or N6 series diaphragm options. Consult the factory.


913-888-2630

Step 5: Pressure Port

5V1-LA3-N6-C1A-YY

Material Connection Designator

Aluminum Alloy 356copper-free casting

1/4” NPT(F) B1A

1/2” NPT (F) B2A

316SS CF-8M Casting1/4” NPT(F) C1A

1/2” NPT (F) C2A


Step 6: Accessories

5V1-LA3-N6-C1A-YY

Accessory / Option & Description Designator

Wetted parts are cleaned for industrial oxygen service. BB

CSA Certified pressure switch. Available with V1 housing. Housing has earth (ground) lug. See agency listings on page 10 for details.

CS

Cemented cover gasket on weathertight housing. GC

Universal terminal box, 1/2” NPT(F). 316SS. Explosion proof. FM Approved; CSA Certified. See form 657 (Catalog GI-30).

HT

Vacuum protector plate retains diaphragm system in the pressure switch if subjected to intermittent vacuum greater than 10 in Hg. If a pressure switch is subjected to continu-ous, rapid changes of vacuum, other protection may be available (consult factory). Material matches or exceeds pressure port material.

MM

Compliance to NACE Certification MR0175/ISO 15156* NC

Pipe (stanchion) mounting kit for (1-1/2” to 2” pipe). Order as a separate line item for CSA Certified pressure switches.

PK

Tag, fiber. Attached with plastic wire to housing. Stamped with customer-specified tagging information.

PP

Powder coat epoxy coating. No coating on stainless steel parts or plated screws. (500 hours-salt spray)

PY

Tag, stainless steel. Attached with stainless steel wire to housing. Stamped with customer specified tagging information. (2 lines, 18 characters and spaces per line.)

RR

Stainless steel piston and cylinder disc for corrosion resistance. SP

Explosion proof and weathertight electrical junction box with screw terminals. Aluminum 3/4” NPT(F) top or right conduit connections as required. UL Listed and CSA Certified Class I, Groups A, B, C & D; Class II, Group E, F & G; Division 1 & 2. Includes cover o-ring for weathertight applications. (V3 housing only.)

TB

Oversize stainless steel nameplate. Permanently attached to housing. Stamped with customer specified tagging information

TT

Fungicidal varnish. Covers exterior and interior except working parts. VV

Epoxy coating. Exterior only. Polyimide epoxy with 316SS pigment. (200 hours-salt spray) YY

Chained cover with captive screws to conform to former JIC specification ZZ

“X” is used as a suffix to the model number for special requirements not keyed elsewhere in the model number by an “X”. Each “X” must be completely identified in the text of the order or inquiry. When more than one “X” is required, use “X” followed by the number of such items. For example, “X3” means three separate, otherwise unidentifiable requirements.

X


913-888-2630

Agency Listings

The following combinations only are available as approved, certified or listed by the agencies shown. Some components are for products not offered in this catalog. Certain components or combinations may acquire additional approval, certification or listing between print dates of this catalog. Contact the factory for the most current information.

CSA Enclosure 4 (Weathertight)

Piston Housing Switching Element Spring Diaphragm

& O-Ring


Connection Size

Accessories/Option

All V1 LA, SA All All AllCS Required All except TB

Certificates C1 C2 C3 C4 C5 C6 C8 B1 B4 B5 B6 B7 A1 A2 A3 A4 A5 A6 A7 A8

Calibration ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿

Hydrostatic Pressure Test ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿

Inspection Report ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿ ¿

Compliance / Conformance ¿ ¿ ¿ ¿ ¿ ¿ ¿

Dielectric Test ¿ ¿ ¿ ¿

Insulation Resistance ¿ ¿ ¿ ¿ ¿ ¿ ¿

Typical Material of Wetted Parts ¿ ¿ ¿ ¿ ¿ ¿

Adjustable Dead Band Pressure Switches Test Certificates


913-888-2630

Adjustable Dead Band Pressure Switches Glossary of Terms

SOR recognizes that there is no industry convention with respect to terminology and definitions pertinent to pressure switches. This glossary applies to SOR Pressure Switches.

Adjustable Range The span of pressure between upper and lower limits within which the pressure switch may be adjusted to actuate/deactuate.

Dead BandThe difference in pressure between the increasing Set Point and decreasing Set Point.

Decreasing Set PointThat discrete pressure at which the pressure switch is adjusted to deactuate on falling pressure. It must fall within the adjustable range.

Hermetically Sealed A welded steel capsule with glass-to-metal, factory-sealed, electrical leads that isolates the electrical switching element(s) from the environment.

Increasing Set PointThat discrete pressure at which the pressure switch is adjusted to actuate on rising pressure. It must fall within the adjustable range.

OverrangeThe maximum input pressure that may be continuously applied to the pressure switch without causing permanent change of Set Point, leakage or material failure.

Pressure SwitchA bi-stable electromechanical device that actuates/deactuates one or more electrical switching element(s) at a predetermined discrete pressure/vacuum (Set Point) upon rising or falling pressure/vacuum.

Proof Pressure The maximum input pressure that may be continuously applied to the pressure switch without causing leakage or catastrophic material failure. Permanent change of Set Point may occur, or the device may be rendered inoperative.

RepeatabilityThe ability of a pressure switch to successively operate at a Set Point that is approached from a starting point in the same direction and returns to the starting point over three consecutive cycles to establish a pressure profile. The closeness of the measured Set Point values is normally expressed as a percentage of full scale (maximum adjustable range pressure).

SPDT Switching Element Single-Pole, Double Throw (SPDT) has three connections: C — Common, NO — Normally Open and NC — Normally Closed, which allows the switching element to be electrically connected to the circuit in either NO or NC state.

DPDT Switching ElementDPDT is two synchronized SPDT switching elements which actuate together at increasing Set Point and deactuate together at decreasing Set Point. Discrete SPDT switching elements allow two independent circuits to be switched; i.e., one AC and one DC.

The synchronization linkage is factory set, and is not field adjustable. Synchronization is verified by connecting test lamps to the switching elements and observing them go “On” simultaneously at actuation and “Off” simultaneously at deactuation.


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Adjustable Dead Band Pressure Switches Dimensions


Pipe Mounting Kit: PK

Junction Box with Terminal Block: TB

Drawing 0090300

Drawing 0091353


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Dimensions


Junction Box with Terminal Block: HT

Weights

Actual shipping weights may vary from the charted values because of product material, configuration and packaging requirements.

Drawing 0090763

V1 Housing V3 Housing

4 lbs (2 kgs) 5 lbs (2.5 kgs)

Accessory Add lbs kgs

Pk Pipe Kit 1.5 0.7

TB Junction box with Terminal Block

5 2.25


913-888-2630

Non-Hazardous LocationsWeathertight NEMA 4, 4X, IP65Housing Designator: V1

Housing Dimensions


Hazardous LocationsContains Explosion Proof, Hermetically Sealed Switching Element Capsule: UL Listed, CSA Certified, ATEX and SAA Approved

Housing Designator: V3


Drawing 0090236

Drawing 0090325


913-888-2630

Notes


913-888-2630Registered Quality System to ISO 9001:2008 Form 281 (03.12) ©2012 SOR Inc.

echOsonix® Level Transmitters

TemperatureSwitches

Pre

ssu

re

Flow

LevelLevel

Switches

Flow Switches

PressureSwitches

SOR® offers a full line of commercial-grade process instruments.

Tem

pera

ture

We Deliver Quality On Time

SOR Europe, Ltd.Farren CourtCowfoldWest Sussex RH13 8BPUnited Kingdom

Phone +44 (0) 1403 864000Fax +44 (0) 1403 864040

SOR - ChinaRoom 903, No. 10 Building Wan Da Plaza No. 93 Jian Guo RoadChao Yang DistrictBeijing, China 100022

Phone +86 (10) 5820 8767Fax +86 (10) 58 20 8770

SOR Inc.14685 West 105th StreetLenexa, Kansas 66215

Phone 913-888-2630Toll Free 800-676-6794Fax 913-888-0767

sorinc.com

Process Instrumentation

Form 466 (05.13) ©SOR Inc. 1/4

These instructions provide information for installation, process and electrical connections and field calibration of SOR® Adjustable Dead Band Pressure Switches.

The pressure sensing elements are a pair of force-balanced, piston-actuated assemblies sealed by flexible diaphragms and o-rings that are static. The only wetted parts in this arrangement are the single pressure port, two sensing assembly diaphragms and o-rings.

Media pressure on the area of the pistons counteracts the force of the range springs (adjustable by the adjusting nuts), which moves the piston shafts only a few thousandths of an inch to operate the lever assembly which actuates and deactuates the electrical switching element.

Adjustable Dead BandPressure Switches

General Instructions

Failure to place washers between the housing and the mounting surface

may result in torsional forces on the housing that could cause false trips

or render the pressure switch inoperative.

Registered Quality System to ISO 9001

NOTE: If you suspect that a product is defective, contact the factory or the SOR Representative

in your area for a return authorization number (RMA). This product should only be installed by

trained and competent personnel.

Installation

Adjustable Dead Band Pressure Switches may be secured to bulkheads, panels or pipe stanchions with suitable bolts. When mounting the pressure switch to an irregular or uneven flat surface, install rubber washers on the mounting bolts between the housing and the mounting surface.

Line mounting by either the process connection or the electrical conduit connection is not recommended.

Design and specifications are subject to change without notice. For latest revision, go to www.sorinc.com

-t

the piston

Failure to mount the housing on a fl at mounting surface may result in

torsional forces on the housing that could cause false trips or render the

pressure switch inoperative.

2/4 Form 466 (05.13) ©SOR Inc.

Process Connection

Securely connect the process line to the pressure port using two wrenches: one to hold the hexagonal flats on the pressure port, the other to tighten the process pipe or tube fitting.

Ensure that the process connection is tightened and positioned so that

any binding and torsional forces imposed on the pressure switch are

minimal. Do not loosen the pressure port from the body because leakage

could result or the pressure switch could be rendered inoperative.


Ensure that wiring conforms to all applicable local and national electrical codes and install unit(s) according to relevant national and local safety codes.

V1 – Weathertight SPDT: Screw terminal block with marked insulation.

Common Normally Open Normally Closed

C1 NO1 NC1

V3 – Explosion proof DPDT (2-SPDT): Hermetically sealed switching element capsule has 18” - 18 AWG wire leads color coded and marked.

Common Normally Open Normally Closed

C1 - Blue NO1 - Black NC1 - Red C2 - Yellow NO2 - Brown NC2 - Orange

GR - Ground (earth) green wire connected to each hermetically sealed switching element capsule.

Calibration

Remove the housing cover. Connect a suitable variable pressure source with a calibrated reference gauge to the pressure port. Connect an ohmmeter or test lamp across the switching element contact terminals to monitor contact continuity. Use a 3/4” open-end wrench to turn the adjusting nuts. Slowly increase pressure to the pressure port. The continuity tester will indicate that the contacts have changed state when increasing set point is reached. Note pressure at increasing set point. If increasing set point is too low, turn the left adjusting nut clockwise to raise the increasing set point. If increasing set point is too high, turn the left adjusting nut counterclockwise to lower the increasing set point.

Safety Integrity Level (SIL) Installation Requirements

The SOR pressure switches have been evaluated as Type-A safety related hardware. To meet the necessary installation requirements for the SIL system, the following information must be utilized:

Proof Test Interval shall be one year. Units may only be installed for use in Low Demand Mode. Products have a HFT (Hardware Fault Tolerance) of 0, and were evaluated in a

1oo1 (one out of one) configuration. Form 1538 (03.12) ©2012 SOR Inc.

Form 466 (05.13) ©SOR Inc. 3/4

Overtravel has been preset at the factory. The 3/16” overtravel adjustment

screw on the lever assembly has been precisely positioned for optimum

performance. Any inadvertent movement could render the device inoperative

and void the warranty.

The left adjusting nut must always be lower than the right adjusting nut when

calibration is complete.

Slowly decrease pressure to the pressure port. The continuity tester will indicate that contacts have changed state when decreasing set point is reached. Note pressure at decreasing set point.If the decreasing set point is too low, turn the right adjusting nut clockwise to raise the decreasing set point. If the decreasing set point is too high, turn the right adjusting nut counterclockwise to lower the decreasing set point. The left adjusting nut must always be lower than the right adjusting nut when calibration is complete. Repeat Steps 3 and 4 until desired set points are obtained. If the pressure switch fails to respond to pressure change during calibration, increasing/decreasing set points may be too close together. See Form 281 for minimum/maximum dead band capabilities. Replace the housing cover.

Principle of Operation

No pressure applied. Electrical switching element is deactuated.

Pressure greater than decreasing set point but less than increasing set point: Electrical switching element remains deactuated.

Pressure equal to or greater than increasing set point: Electrical switching element is actuated.

Pressure less than increasing set point but greater than decreasing set point: Electrical switching element remains actuated.

Pressure equal to or less than decreasing set point: Electrical switching element is deactuated.

Actuation Deactuation

Piston movement exaggerated for clarity in drawings above.

Increasing Set

Point Adjustment

To raise the increasing set point, turn the left adjust-

ing nut clockwise. To lower the increasing set point,

turn the left adjusting nut counterclockwise.

Decreasing

Set Point Adjustment

To raise the decreasing set point, turn the right adjusting nut clockwise. To lower the decreasing set point, turn the right adjusting nut counter-clockwise.

4/4 Form 466 (05.13) ©SOR Inc.

Dimensions

Dimensions are for reference only. Contact the factory for certified drawings for a particular model number.

Linear = mm/inches

Drawing 0090236

Linear = mm/inches

Drawing 0090325

14685 West 105th Street, Lenexa, KS 66215 913-888-2630 800-676-6794 USA Fax 913-888-0767


Printed in USA www.sorinc.com

V1 Housing

V3 Housing

*Add 6.4 for non-aluminum ports.

0.25

*Add 6.4 for non-aluminum ports.

0.25

SOR Form 506 (04.05) Printed in USA Page 1 of 4

This product should only be installed by trained and competent personnel.

1. Secure the housing to a bulkhead, panel rack or pipe stanchion with suitable bolts.

IMPORTANT: When bolting housings with integral mounting pads to irregular or uneven surfaces, install rubber washers between the housing and the mounting surface to prevent deformation of the housing.

General

These instructions provide information for installation, electrical connection, process connection and calibration of Series 101/121 Differential Pressure Switches.

B-Series models (B3, B4, B5, B6) may be ATEX Approved with the addition of a CL option at the end of the model string. Specific information and instructions concerning these models will be found throughout the following pages.

NOTE: SOR discourages field modifications and field repair. Products should be returned to SOR for inspection and necessary repair work. Contact the factory for a return authorization number. Any field work should be performed by qualified instrument technicians using factory-authorized procedures.

Principle of OperationProcess pressure is sensed by a diaphragm and piston assembly. The piston responds to differential pressure and moves a shaft that actuates (deactuates) an electrical switching element. Low side pressure and an adjustable range spring oppose high side pressure. Adjustment of the range spring determines the set point. (See Calibration.)

CAUTION: Use care during installation to avoid moving the electrical switching element or its housing. Movement of either could change calibration or render the device inoperative.

Design and specifications are subject to change without notice.

Series 101/121

Differential Pressure Switches

Installation Electrical Connection

CAUTION: Failure to mount the housing on a flat mounting surface may result in torsional forces on the housing that could cause false trips or render the pressure switch inoperative.

2. Line mounting by either process connection or electrical conduit connection is not recommended for housings with integral mounting pads.

3. Suggested mounting orientation is high side process pressure port at 6 o’clock. However, the device can be mounted in any position. Optional breather drains should be positioned to allow moisture to escape from the housing interior. Breather drains must be kept clear of paint and foreign matter.

CAUTION: For B-Series Housings One vent hole should be fitted with a suitable breather to maintain weathertight rating NEMA 4, 4X, IP65 or vented to a safe area. Piping should be minimum 1/4” diameter and maximum 5 meters long (based on process fluid SG 1.0). The other vent hole may be plugged.

Process Connection

Connect the process lines to the pressure ports using two wrenches: one to hold the hex flats on the pressure port, the other to tighten the process pipe or tube fitting. The high pressure side (stamped HI) and the low pressure side (stamped LO) have 1/4” NPT(F) or 1/4” BSP(F) process connections as standard.

IMPORTANT: Rigid process piping must be arranged to minimize bending or twisting forces which could disturb the positioning of internal parts and change calibration or render the device inoperative after installation. Use care to avoid loosening the pressure port from the body or the body from the electrical housing.

Ensure that wiring conforms to all applicable local and national electrical codes and install unit(s) according to relevant national and local safety codes.

NOTE: For B-Series ATEX Certified ModelsElectrical conduit connection threads may be of non-ISO thread form. Check the product nametag for relevant thread form information before attempting to connect to the electrical conduit connection. In the event a fitting is used, check the adaptor body for thread size information.

General Instructions

For latest revision, see www.sorinc.comRegistered Quality System to ISO 9001

Mini-Hermet Models General Purpose and Weathertight

Models

B-Series Models

Page 2 of 4 SOR Form 506 (04.05) Printed in USA

Calibration

Mini-Hermet modelsRemove the weathertight cap. Use a 1/8” hex Allen wrench to turn the adjusting screw to the desired set point. Turn the adjusting screw clockwise (in) to increase the set point and counterclockwise (out) to decrease the set point. Use either the coarse or the precise set point calibration procedure.

CAUTION: Do not unthread the adjusting screw more than two threads below the flush point of housing as calibration could be adversely affected.

All Other ModelsUse a 3/4-inch open-end wrench to turn hex adjusting nut clockwise to increase set point, and counterclockwise to decrease set point. An approximate set point can be obtained by sighting across top of adjusting nut to the calibration scale

on the interior wall of the housing. If coarse or precise set point calibration is required, calibrate according to the appropriate procedure.

WARNING: For B-Series Housings The electrical compartment cover must remain sealed and the Allen locking screw tightened at all times to prevent removal of the cover while the pressure switch is in service. Removal of the cover while the pressure switch is in service in a hazardous location could result in severe personal injury or substantial property damage.

Coarse Calibration Procedure1. Connect variable pressure source to test gauge and HI

side pressure port.2. Connect test light or ohmmeter across C – Common

and NO – Normally Open switching element contacts.3. Raise pressure and note test gauge reading when

circuit closes.4. Slowly drop pressure and note test gauge reading

when circuit opens.5. Turn set point adjustment clockwise to increase set

point, or counterclockwise to decrease set point.6. Repeat Steps 3, 4 and 5 until contacts change at desired

increasing or decreasing differential pressure set point.

Precise Calibration ProcedureThe precise calibration procedure references system (static) pressure. Set point accuracy is enhanced by calibrating the differential pressure switch under simulated service pressure conditions. The following test apparatus is recommended.

1. Differential pressure gauge2. Variable pressure source 3. Block/bleed and equalizer valves4. Test light or ohmmeter

Determine whether the critical set point occurs on increasing or decreasing differential pressure, and calibrate using the appropriate procedure:

For Critical Set Point on Increasing Differential Pressure1. Connect the continuity test lamp or ohmmeter across

the C - Common and NO - Normally Open switching element / contacts.

2. Close the bleed valve(s), open the equalizer valve and raise pressure equally on both HI and LO sides to the static pressure that the differential pressure switch will see under normal operating conditions.

3. With static pressure stable, close the equalizer valve to isolate the HI side from the LO side.

4. Keeping high side pressure steady, slightly open the LO side bleed valve to reduce the LO side pressure (increase differential pressure) until desired differential pressure set point appears on indicator. Close bleed valve to stabilize differential pressure. Check the status of the electrical contacts against the following differential pressure trend graphs. Follow the instructions under the graph that matches the status of the contacts.

See SOR Form 468 for reference dimension drawings. For certified dimension drawings contact factory.

Wire Lead Color CodeBlue (C)Black (NO)Red (NC)

SPDT

NOTE: Storing excess wire or making wire lead splices inside the pressure switch housing should not be done and may interfere with the pressure switch operation.

DPDT (2-SPDT)

DifferentialPressure

HI

HINo. 1

DifferentialPressure

Blue (C)Black (NO)Red (NC)Yellow (C2)Brown (NO2)Orange (NC2)

No. 2

LO

LO

FIGURE 1

CAUTION: Electrical power must be disconnected from explosion proof models before the cover is removed. Failure to do so could result in severe personal injury or substantial property damage.

When making electrical connections, use care to avoid movement of the electrical switching element.

Electrical connections are either screw terminals, terminal blocks or 18-gauge, 18-inch wire leads.

Screw terminal and terminal block points are identified on the insulation card inside the electrical housing. Refer to the wiring schematic in Figure 1 for wire lead color codes.

SOR Form 506 (04.05) Printed in USA Page 3 of 4

If contacts make precisely at critical increasing differential pressure set point, repeat Steps 2 - 4 as desired to verify calibration. Calibration is complete.

If contacts are open when critical increasing differential pressure is reached, turn set point adjustment counterclockwise (out) until contacts make. Repeat Steps 2-4.

If contacts are closed when critical increasing differential pressure is reached, turn set point adjustment clockwise (in) until contacts break. From this point, turn set point adjustment counter-clockwise (out) until contacts make. Repeat Steps 2-4.

Contacts Closed Set Point Too Low

Contacts Open Set Point Too High

Set Point OK

Critical Increasing Set Point

Make

Break

BreakMake

BreakMake

0 Time 0 Time0 Time

1. Connect the continuity test lamp or ohmmeter across the C - Common and NO - Normally Open contacts.

2. Close the bleed valve(s), open the equalizer valve, and raise pressure equally on both HI and LO sides to the normal operating high side pressure.

3. With normal HI side pressure stable, close the equalizer valve to isolate the HI side from the LO side.

4. Slightly open the LO side bleed valve to reduce LO side pressure (increase differential pressure) until the normal operating differential pressure appears on the digital indicator. Close the bleed valve to stabilize differential pressure. Contacts should close (make) by the time normal operating differential

pressure is reached. If the contacts are still open at

normal operating differential pressure, turn the set point adjustment counterclockwise (out) until the contacts make.

5. Keeping the high side pressure steady, slightly open the equalizer valve to increase LO side pressure (decrease differential pressure) until the desired differential

pressure set point appears on the digital indicator. Close the equalizer valve to stabilize differential pressure. Check the status of the electrical contacts

against the following differential pressure trend graphs. Follow the instructions under the graph that matches the status of the contacts.

For Critical Set Point on Decreasing Differential Pressure

0 Time

Contacts Closed Set Point Too Low

Contacts Open Set Point Too High

Set Point OK

If contacts break precisely at critical decreasing differential pressure set point, repeat steps 2-5 as desired to verify calibration. Calibration is complete.

If contacts are open when critical decreasing differential pressure is reached, turn set point adjustment counterclockwise (out) until contacts make. From this point, turn set point adjustment clockwise (in) until contacts break. Repeat Steps 2-5.

If contacts are closed when critical increasing differential pressure is reached, turn set point adjustment clockwise (in) until contacts break. Repeat Steps 2-5.

0 Time

MakeBreak

Make

0 Time

Break

Normal Operating

Differential Pressure

Make

Critical Decreasing Set Point

Diffe

renti

al Pr

essu

reDi

ffere

ntial

Pres

sure

Page 4 of 4 SOR Form 506 (04.05) Printed in USA

14685 West 105th Street, Lenexa, Kansas 66215 913-888-2630 Fax 913-888-0767 www.sorinc.com


Operation

For B-Series ATEX Certified ModelsMaximum Surface TemperatureT6 Rating - 85oCT5 Rating - 100oC

For B-Series ATEX Certified ModelsManufacturer’sRegistered Trademark

ATEX Listing Information Product Type

Identification

Thread Form Information

Product Model Identification

Serial Number (First Two Numbers Indicate Year of Manufacture)

ATEX Marking Information

Basic and 4th Designator

Adjustable Range Maximum System Pressure Maximum Differential Pressure

psid bar psi bar psi bar101 - 3 3 to 30 .2 to 2.1 500 34 500 34

101 - 45 10 to 75 .7 to 5.2 500 34 500 34121 - 45 75 to 500 5.2 to 34 1000 69 1000 69

Designator AC Rating DC Rating ResistiveSPDT DPDT Volts Amps Volts Amps Volts Amps

K KK 250 15 125 0.4 30 5KA N/A 125 1 - - 28 1J JJ 125 1 - - 30 1G GG 250 15 125 0.5 - -A AA 250 11 125 0.5 30 5L LL 250 15 - - 30 10E EE 250 5 125 0.5 30 5C N/A 250 15 125 0.5 - -S N/A 125 10 125 1.5 Minimum

10.0 Maximum- -

B BB 250 5 125 0.3 - -Y YY 250 5 125 0.5 - -W N/A 250 5 125 0.3 - -T N/A 250 15 125 0.4 - -H N/A 250 15 - - - -AF AG 250 5 125 0.5 30 5EF EG 125 1 - - 28 1JF JG 125 1 - - 30 1

Documents

Differential Presure Switches Series 101.121