Mounting and Operating Instructions EB8546 EN Solenoid...Supply Pressure Regulators Type 4708 Mounting and Operating Instructions EB8546 EN EditionJune 2012 Fig. 1 · Supply pressure

Supply Pressure RegulatorsType 4708

Mounting andOperating Instructions

EB 8546 ENEdition June 2012

Fig. 1 · Supply pressure regulators

Type 4708-1152 with filter receptacle

Type 4708-5352 on Type 3730 Positioner

Type 4708-6252 on Type 3372 Actuator

Contents Page

1 Design and principle of operation. . . . . . . . . . . . . . . . . . . . 41.1 Versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2 Mounting the supply pressure regulator. . . . . . . . . . . . . . . . . 82.1 Compact supply pressure regulator . . . . . . . . . . . . . . . . . . . 82.1.1 Direction of flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.1.2 Turning the supply pressure regulator . . . . . . . . . . . . . . . . . . 92.2 Supply pressure regulators for attachment to positioners and actuators. . 10

3 Pneumatic connections . . . . . . . . . . . . . . . . . . . . . . . . 143.1 Pressure gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143.2 Additional connection for a solenoid valve . . . . . . . . . . . . . . . 153.3 Manual/automatic transfer. . . . . . . . . . . . . . . . . . . . . . . 183.3.1 Mounting on positioners . . . . . . . . . . . . . . . . . . . . . . . . 183.3.2 Mounting using an adapter plate. . . . . . . . . . . . . . . . . . . . 193.3.3 Operating the manual/automatic transfer . . . . . . . . . . . . . . . 203.4 Filter with filter receptacle . . . . . . . . . . . . . . . . . . . . . . . 203.4.1 Mounting the air filter . . . . . . . . . . . . . . . . . . . . . . . . . 203.5 Rotatable supplementary filter . . . . . . . . . . . . . . . . . . . . . 213.5.1 Mounting the rotatable supplementary filter . . . . . . . . . . . . . . . 21

4 Set point adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 22

5 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236.1 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

7 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

8 Dimensions in mm. . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2 EB 8546 EN

Contents

EB 8546 EN 3

Safety instructions

General safety instructions

� The supply pressure regulators may only be mounted, started up or servicedby fully trained and qualified personnel, observing the accepted industrycodes and practices. Make sure employees or third persons are not exposedto any danger. All safety instructions and warnings in these mounting andoperating instructions, particularly those concerning assembly, start-up andmaintenance, must be observed.

� Proper shipping and appropriate storage of the regulators are assumed.

1 Design and principle ofoperation

The supply pressure regulator is used to sup-ply pneumatic measuring and control equip-ment with a constant air supply.The maximum 12 bar pressure of the com-pressed air network in a plant is reduced toan adjustable minimum pressure of 0.2 to1.6 bar or 0.5 to 6 bar.

At the inlet side, the supply pressure regula-tor is equipped with a filter cartridge with amesh size of 20 µm. In addition, the regula-tor can also be equipped with a filter recep-tacle and a pressure gauge on the outletside.

The compressed air at the inlet flows acrossthe filter and through the free cross-sectionalarea between the seat (1.1) and plug (1.2).It leaves the outlet with a reduced pressuredepending on the plug position.

The output pressure to be controlled is trans-ferred through the bore (1.3) to the operat-ing diaphragm (2) where it is converted intoa positioning force. This force is used tomove the valve plug depending on the forceof the positioning spring (4).Turning the set point screw (7) causes thespring force to change and, as a result, therequired set point is adjusted.The set point ranges of the supply pressureregulator from 0.2 to 1.6 bar and 0.5 to6 bar are determined by various tensions ofthe installed positioning spring (4).

Condensed water contained in the com-pressed air can be collected and drainedwhen the filter cartridge (9) is mounted hori-zontally or the filter receptacle (12) is sus-pended downwards. The stopper (10) canbe unscrewed or the manual drainage canbe activated (drain plug (15) in old versions)to drain condensed water.

Note: Tighten the drain plug by hand only.The maximum permissible tightening torqueis 3 Nm.

4 EB 8546 EN

Design and principle of operation

EB 8546 EN 5


15

1.11 1.2 1.3 2 3 4 5 6 7 8

9

10

10.1

11

11.112.1

12

139

16

Fig. 2 · Sectional drawings

1 Body1.1 Seat1.2 Plug1.3 Bore in body2 Operating diaphragm3 Venting bore4 Positioning spring5 Cap6 Lock nut7 Set point screw8 Adjustment knob

(accessories in Section 7)9 Filter cartridge10 Stopper11 Bushing11.1 Gasket12 Filter receptacle12.1 Gasket13 Screw15 Drain plug (max. 3 Nm)16 Manual drainage

Old version

Adapter plate/connecting plate

Diverting gasket

1.1 Versions

Standard version Type 4708-x x x x

Filter on aluminum basis withoutfilter receptacle

1 0

With plastic filter receptacle 1 1

With aluminum filter receptacle 1 2

Stainless steel supply pressure regulator

Filter on stainless steel basis withstainless steel receptacle

1 3

With plastic filter receptacle 1 4

Without filter receptacle 1 7

Connection

G ¼ 2

¼-18 NPT 5

Set point range 0.5 to 6 bar (8 to 90 psi)

Without pressure gauge 0

With pressure gauge,completely free of copper

1

With pressure gauge,copper-free housing

2

Set point range 0.2 to 1.6 bar (3 to 23 psi)

Without pressure gauge 3

With pressure gauge, comple-tely free of copper

4

With pressure gauge,copper-free housing

5

Supply pressure regulator with adapter platefor positioners

Type 3730, 3766, 3767, 3780,3785, 3787

5 3

Type 3730, 3766, 3767, 3780,3785, 3787

5 4

Type 4763/4765 5 5 0

Type 3760 5 7

Type 3761 5 8

Supply pressure regulator with adapter platefor pneumatic actuators

Type 3277 (240 to 700 cm²)with Type 3730, 3766, 3767,3780, 3785 or 3787 Positioner

6 2 0

Type 3372 6 2

Type 3277 with connectionblock

6 4

Manual/automatic transfer

Bypass for positioner 8 2

Filter without pressure gaugeType 4708- x x x 0

Aluminum housing and plasticfilter receptacle

8 3 0

Aluminum housing and alu-minum filter receptacle

8 4 0

Stainless steel housing andplastic filter receptacle

8 6 0

Stainless steel housing andstainless steel filter receptacle

8 7 0

6 EB 8546 EN


1.2 Technical data

EB 8546 EN 7


Supply pressure regulator Type 4708-xx

Supply pressure 1 bar (15 psi) above the adjusted set point,however, at least 1.6 bar (24 psi) · Max. 12 bar (180 psi)

Output pressure Adjustable from 0 to 1.6 bar (0 to 24 psi) or 0 to 6 bar (0 to 90 psi)

Set point range 0.2 to 1.6 bar (3 to 24 psi) or 0.5 to 6 bar (8 to 90 psi)

Air consumption � 0.05 mn3/h (with 7 bar supply air)

Permissible ambienttemperature(values in brackets apply tolow-temperature version)

–25 to 70 °C (–50 to 70 °C) for Types 4708-11, -14, -45, -83, -86–25 to 80 °C (–40 to 80 °C) for Type 4708-64–25 to 80 °C (–50 to 80 °C) for Types 4708-10, -12, -13, -17, -53, -54, -55, -57,

-58, -62, -82, -84, -87(–30 °C possible, but in this case, air consumption reaching up to 0.3 mn

3/h with7 bar supply pressure)

Input pressure dependance < 0.01 bar/�p = 1 bar

Reversing error 0.1 bar to 0.4 bar (depending on the set point)

Hysteresis < 0.1 bar

Pressure gauge Ø40indication range

0 to 1.6 bar (0 to 24 psi) or 0 to 6 bar (0 to 90 psi)Connection G 1

8

Type 4708- 10 11 12 13 14 17 53 54 55

Weight, approx. 0.48 0.58 0.66 1.65 1.2 1.0 0.68 0.95 0.37

Type 4708- 57 58 62 64 82 83 84 86 87

Weight, approx. 0.47 0.4 0.4 0.5 0.4 0.24 0.32 0.59 0.95

Materials

Body Polyamide, glass fiber reinforced

Adapter plate Aluminum alloy, anodized black

Stopper and gasket Polyamide, glass fiber reinforced and NBR

Cover Polyamide, glass fiber reinforced

Cap Polyamide, glass fiber reinforced

Plug Polyamide, glass fiber reinforced and polyoxymethylene

Plug sealing NBRT and VMQ

Diaphragm NBR

Diaphragm plate Polyamide, glass fiber reinforced

Filter cartridge 20 µm: Polypropylene · 5 µm: Stainless steel

Pressure gaugeHousingConnection

Stainless steelSt. steel (version free of copper)

Brass, nickel-plated

2 Mounting the supplypressure regulator

To prevent excessive amounts of condensedwater from collecting, the distance betweenthe compressor and supply pressure regula-tor should be kept as short as possible.Make sure the drain plug faces downwardsin versions with a filter receptacle.

2.1 Compact supply pressureregulator

The supply pressure regulator can either bemounted directly in the pipeline of the airsupply or on rails or brackets using the cor-responding mounting parts (see accessoriestable in section 7).

Observe the direction of flow of the supplyair. An arrow on the nameplate indicatesthe direction.

2.1.1 Direction of flow

In the compact supply pressure regulators4708-10xx/-11xx/-14xx and -17xx thedirection of flow can be changed as follows:

1. Unscrew both fixing screws and lift thesupply pressure regulator off its connect-ing plate.

2. Remove the diverting gasket, turn it180 degrees and reposition it as shownin Fig. 3.Note: The long rubber finger of the gas-ket must always point in the direction ofthe regulator outlet.

3. Fasten the supply pressure regulatoronto the connecting plate.

4. Stick the enclosed adhesive label overthe arrow of the nameplate, ensuring thearrow indicates that the supply air flowsin the opposite direction.

8 EB 8546 EN

Mounting the supply pressure regulator

G4708-112.

0 6

3-....

0 6

3-....4708-112. G

Fig. 3 · Changing the direction of flow in compact supply pressure regulators

Connecting plate

Standard labelDiverting gasket Connecting plate

Label with arrow

Fixing screws

Long rubber finger always pointing towards the regulator outlet

Supplypressureregulator

2.1.2 Turning the supply pressureregulator

The supply pressure regulator can be turnedon its connecting plate to allow the set pointscrew to face either up or down.

1. Unscrew both fixing screws and lift thesupply pressure regulator off its connect-ing plate.

2. Pull the diverting gasket out of the regu-lator and keep it in this position.

3. Turn the regulator 180 degrees and re-insert the gasket. In this way, you keepthe bore assignment of the gasket forsupply air input and regulator outlet.Note: The long rubber finger of the gas-ket must always point in the direction ofthe regulator outlet (reduced supplypressure).

4. Fasten the regulator onto the connectingplate.

EB 8546 EN 9


Fig. 4 · Turning the supply pressure regulator on its connecting plate or adapter plate

Supply air input

Connecting plate or adapter plate

Supply air input(Supply) >

Regulator facing downward

Diverting gasketLong rubber finger

always pointingtowards outlet

Regulator facing upward

Fixing screws

Regulator outlet

Diverting gasketFront and back view

Regulator outlet (long rubber finger)

Supply air inputdepending on theposition of thegasket

2.2 Supply pressure regulatorsfor attachment to positionersand actuators

The supply pressure regulator versions in-tended for attachment to positioners and ac-tuators are equipped with various adapterplates for the attachment.If required, the installation position of thesupply pressure regulator can be changedby turning it 180° on its adapter plate to al-low the set point screw/adjustment knob toface either up or down. This applies particu-larly for positioners which can be attachedeither to the left or right side of the valveyoke to determine the operating directionand fail-safe action of the actuator.To turn the supply pressure regulator, pro-ceed as described for the compact supplypressure regulator in section 2.1.2. The reg-ulator is turned on its adapter plate insteadof on the connecting plate.

Regulators for Types 3730/3766/3767/3780/3785/3787 Positioners

Type 4708-53xx for Type 3271 Actuatorand Type 3277 Actuator with 120 cm² aswell as 240 to 700 cm² with hooked-upvalve accessories.

1. Insert the gasket (2) into the recess of theadapter plate (1).

2. Place the supply pressure regulator onthe positioner on the side where thepneumatic connections SUPPLY andOUTPUT are located. Screw tight usingboth M5 screws (3).

Type 4708-54xx for rotary actuators.Proceed to mount as Type 4708-53xx.

Type 4708-54xx has a second outputsealed with a stopper. This is intended forreduced supply air. It can be used to supplya second device, if required (e.g. a pilot-op-erated solenoid valve).

10 EB 8546 EN


Fig. 5 · Attachment onto positioners

Type 4708-53xx

73

194

111

Type 4708-54xx

Type 4708-55xx for Type 4763 andType 4765 Positioner

1. Screw the special nuts (5) into the con-necting holes of the positioner.

2. Insert the gasket (2) into the recess of theadapter plate (1).

3. Push the special hollow screws (6) forSUPPLY and (7) for OUTPUT into theconnecting holes of adapter plate (1).

4. Place the supply pressure regulator ontothe positioner and fasten it using bothspecial screws.

5. Seal the spare connections with stoppers(4) to prevent dirt from entering the de-vice.

Type 4708-57xx for Type 3760 Positioner

The attachment for a positioner mounted onthe left side of the valve yoke (seen from theblack switchover plate) is shown. For apositioner mounted on the right side, theadapter plate is attached in the same way,except the supply pressure regulator must beturned by 180° (see bottom of page 28).

1. Screw the special nuts (5) into the con-necting holes of the positioner.

2. Insert the O-rings (9) into the recess ofthe adapter plate (1).

3. Push the special hollow screws (6) forSUPPLY and (7) for IN. SIGNAL intoconnecting holes of adapter plate (1).

4. Place the supply pressure regulator ontothe positioner and fasten it using bothspecial screws.

5. Seal the IN. SIGNAL connection of i/ppositioner with stainless steel stopper(10).


EB 8546 EN 11


60

SAMSON 47634708-552.

60

G

17

6

5

5

2

1

4

4

10

17

9

6

1

5

5

Fig. 6 · Attachment to positioners

Switchoverplate

Type 4708-58xx for Type 3761 Positioner

1. Screw the special nut (5) into the SUPPLYconnecting hole of the positioner.

2. Push the special hollow screw (6) intothe connection hole of the adapter plate(1).

3. Insert the O-ring (9). Position the supplypressure regulator and fasten it to thepositioner using the special screw.


Type 4708-64xx for Type 3277 Actuator

Before attaching the supply pressure regula-tor, check whether the tongue of the gasket(1.2) is aligned at the connection block (1)in such a way that the actuator symbol (1.3)indicating “Actuator stem extends” or “Actu-ator stem retracts” matches the fail-safe ac-tion of the actuator.If this is not the case, proceed as follows:

1. Unscrew the three Phillips screws (3.1),lift off the cover plate (1.1) and turn thegasket (1.2) by 180° and reinsert it.

2. Place the connection block with insertedO-ring on the positioner and actuatoryoke and fasten it with hexagonal socketscrew (3).

3. Place the supply pressure regulator withO-ring on the connection block and fas-ten it with hexagonal socket screw (2).

12 EB 8546 EN


3

1

1.1

1.2

1.3 3.1

3.1

2 1

G3/8

1 38238

GO

utputO

utputS

Input

6

5

43

2

1

0

27

1

694

1

5

Fig. 7 · Attachment of supply pressure regulator

Type 4708-62xx for Type 3372 Actuator

1. Screw the special nut (5) into the SUPPLYconnecting hole of the actuator.

2. Push the special hollow screw (6) intothe connecting hole of the adapter plate.

3. Insert the O-ring (9). Position the supplypressure regulator and fasten it onto ac-tuator using the special screw.


EB 8546 EN 13


195

64

165

94

Fig. 8 · Attachment to Type 3372 Actuator

3 Pneumatic connections

The pneumatic connections are designed ei-ther as G ¼ or ¼ NPT-18 threads. On com-pact supply pressure regulators, an arrowon the adhesive label indicates the directionfrom the supply air input to the output.

In supply pressure regulators with two con-necting holes in the adapter plate (Figs. 5and 6, top), the supply air connection ismarked SUPPLY. The positioner's output sig-nal is routed in these versions over theOUTPUT port through the adapter plate tothe actuator.

3.1 Pressure gauge

Mount the pressure gauge in such a waythat there is a 2-3 mm gap between the locknut and pressure gauge's square end aftertightening the lock nut (20).

In the compact versions (Type 4708-12xx/-13xx), make sure additionally that thestopper (23) is only screwed in to the pointwhere it becomes aligned with the housing,otherwise the gaskets (21, 22) will be dam-aged. Each gasket is assigned either to thepressure gauge or to the stopper and mustbe changed correspondingly if you changethe location of the pressure gauge andstopper to the other side.

14 EB 8546 EN

Pneumatic connections

20 22

2...3 mm 0 mm

21 23

Fig. 9 · Pressure gauge attachment, e.g. with Type 4708-12xx/13xx Supply Pressure Regulators

3.2 Additional connection for asolenoid valve

An additional output for reduced air pres-sure is required to allow the supply pressureregulator to supply two pneumatic devices.In some versions of Type 4708 (see sec-tion 7 on accessories), a second output canbe made available by using an intermediateplate.Example: Pneumatic actuator with positionerand pilot-operated solenoid valve � Supplyair must be supplied separately to the pilotcontrol.

The reduced supply pressure of the supplypressure regulator is additionally routed tothe threaded connection at the side over thecorresponding holes in the intermediateplate. All supply pressure regulators havethe same intermediate plate, except forType 4708-57xx, designed for attachmentto Type 3760 Positioner (Fig. 12), its inter-mediate plate has a different hole assign-ment for the air ducts.All versions can be ordered made of alumi-num or stainless steel and with either G orNPT threads. See section 7 for more details.

EB 8546 EN 15


1

1.1

A

A

A

A

ESUPPLY

22.1

3

4

4.1

E

E

E

Fig. 10 · Mounting an intermediate plate for Types 3730/3766/3767/3780 Positioners

Intermediate plate (2) withadditional connection

Output forreduced supply air

Mounting the intermediate plate

1. Remove the fixing screws and lift thesupply pressure regulator (4) togetherwith the diverting gasket (3) off theadapter plate (1).Make sure you do not change the posi-tion of the diverting gasket in the supplypressure regulator.

Note: The long rubber finger of the divertinggasket (3) must always point in the directionof the regulator outlet (reduced supply air).See Figs. 10, 11 and 12.

2. Insert O-rings (2.1) in the holes of the in-termediate plate (2).

3. Place the intermediate plate onto theadapter plate in such a way that thethree holes located next to one anotherare positioned over both 5 mm holes on

16 EB 8546 EN


11.1

E

AM

A

2

2.1

3

44.1

A

AE

AE

AE

Fig. 11 · Mounting an intermediate plate on Type 3372 Actuator

Output forreduced supply air

Supply air input

Intermediateplate (2)

the adapter plate and the bores (1.1) forthe fixing screws are aligned.

4. Place the supply pressure regulator (4)with the diverting gasket (3) onto the in-termediate plate (2). Insert the longer fix-ing screws and fasten the parts.

EB 8546 EN 17


SUPPLY

AM

A

2

1

2.1

1.1

E

E

3

E

4

4.1

E

A

A

A

A

Fig. 12 · Mounting an intermediate plate on Type 3760 Positioner

3.3 Manual/automatic transfer

The positioner output is routed to the actua-tor over the manual/automatic transfer. Inautomatic mode, the positioner is inclosed-loop operation. In manual mode, theoutput pressure of any supply pressure regu-lator is directly applied to the actuator. Thiscreates a manual bypass for the positioner.

The manual/automatic transfer unit ismounted directly onto Types 376x, 378xand 373x (Fig. 14) or on an adapter platewith hook-up to the actuator (Fig. 13).

The Type 4708-53 (Fig. 15) or Type4708-54 Supply Pressure Regulator can befastened onto the regulator. All other supplypressure regulators can be connected to themanual/automatic transfer by a piping(hook-up).

3.3.1 Mounting on positioners

� Insert flat gasket into recess of the man-ual/automatic transfer unit (Fig. 14).

� Fasten manual/automatic transfer unit tothe positioner using the two hexagonsocket screws.

� Connect hook-up to the Supply and Out-put connections of the manual/automatictransfer unit.

18 EB 8546 EN


1

Output (38)

Supply (9)

2

3

4

Supply

Output

Fig. 13 · Mounting the manual/automatic transfer using an adapter plate

1 Pneumatic controlvalve with positioner

2 Adapter plate1400-9605 (G)1400-9606 (NPT)

3 Manual/automatictransferType 4708-82in AUTO mode

4 Supply pressure regu-lator with filter(e.g. Type 4708-10)

Fig. 14 · Mounting on a positioner

Optionally, a Type 4708-53 Supply Pres-sure Regulator can be mounted upstream ofthe manual/automatic transfer unit(Fig. 15).

3.3.2 Mounting using an adapterplate

� Fasten adapter plate, for example to aNAMUR rib using a hexagon socketscrew.

� Fit the flat gasket on the manual/auto-matic transfer unit. Fasten it to theadapter plate using the two hexagonsocket screws.

� Connect hook-up for positioner and actu-ator as shown in Fig. 13.

EB 8546 EN 19


Fig. 15 · Type 4708-82 Manual/Automatic TransferUnit, Type 4708-53 Supply PressureRegulator with pressure gauges androtatable filter receptacle

Fig. 16 · Mounting using adapter plate

3.3.3 Operating the manual/automatic transfer

In normal operation, the manual/automatictransfer runs in automatic mode, duringwhich the positioner supplies air to thepneumatic actuator.

To switch to manual mode, twist off the plas-tic cap. Turn the switchover pin counter-clockwise and pull it (approx. 1 cm) out ofthe bayonet lock. The compressed air is thenrouted directly from the supply pressure reg-ulator or from the air supply network to thepneumatic actuator.

To switch back to automatic mode, push inthe switchover pin again. To do this, insertthe lock pin completely into the bayonet andlock it. Replace plastic cap and tighten.

3.4 Filter with filter receptacle

The Types 4708-83, 4708-84, 4708-86and 4708-87 Air Filters are designed foruniversal use. They have either G ¼ or¼-18 NPT threaded connections.

3.4.1 Mounting the air filter

Mount the air filter directly into the pipeline,while ensuring the direction of flow (printedon the device) is kept.

The filter receptacle must face downwards tofunction correctly.

20 EB 8546 EN


Fig. 17 · Cap and switchover pin Fig. 18 · Types 4708-83 to -87 Air Filters

3.5 Rotatable supplementaryfilter

The rotatable supplementary filter (seeFig. 15) is designed for mounting to Type4708-53 and Types 4708-55 to -64 SupplyPressure Regulators. They replace the smallintegrated filter cartridge. The entire filterhousing can be rotated by 360° to ensurethat the condensate drain is always facingdownwards.

Filter versions

Aluminum housing with filter in transparentplastic receptacle

Temperature range: ––20 to 70 °COrder no. 1400-9460

Special versionTemperature range:

–40 to 70 °COrder no. 1400-9461

3.5.1 Mounting the rotatablesupplementary filter

� Remove the cover and filter cartridgefrom the supply pressure regulator.

� Place the supplied seal carefully onto thegroove (see arrow) of the connection.

� Insert connecting pipe together with sealinto the supply pressure regulator andtighten the plastic coupling nut.

Note: Make sure that the seal does not fallout of the groove during mounting, other-wise the filter will not function properly.

� Align the supplementary filter in the verti-cal direction.

� Secure the position by tightening thehexagonal socket screw (6 mm).

EB 8546 EN 21


Fig. 19 · Connection and seal for supplementary filter

4 Set point adjustment

(Fig. 2)

Depending on the version, the set point ofthe supply pressure regulator can be ad-justed either at the adjustment knob (8), orafter screwing off the cap (5), at the setpoint screw (7).

� Turning the knob or screw clockwise in-creases the output pressure and turning itcounterclockwise reduces the outputpressure.

� Use the lock nut (6) to secure the setting.

Note: When using the version with the ad-justment knob (8) to adjust the set point,make sure that the Phillips screws arescrewed tight to prevent the knob from com-ing loose due to vibration.

5 Maintenance

(Fig. 2)

We recommend you check the filter as oftenas possible.Drain condensed water that has collected:

� Remove the stopper (10) or� Unscrew the drain plug (15) by about

half a turn or� Activate the manual drainage (16).

Note: Tighten the drain plug by hand only.The maximum permissible tightening torqueis 3 Nm.

When faults occur, e.g. a pressure drop, un-screw the stopper (10) or the filter receptacle(12) and replace the filter cartridge (orderno. 8504-9027).Prior to carrying out any maintenance work,shut off the air supply!

In the version with a filter receptacle, screwthe fixing screw (13) tight so that the filtercartridge sits properly. Replace the gasket(12.1) order no. 0439-0061, if necessary.

In the versions 4708-11xx/14xx, do not un-screw the bushing (11), if at all possible. If,however, you needed to unscrew it, you canreplace the gasket (11.1) order no.0439-0287 as well.

If there is any leakage at the stopper (10),the entire stopper including the seal (10.1)must be replaced. Refer to section 6.1 onspare parts.

22 EB 8546 EN

Set point adjustment

6 Troubleshooting

� Leakage between supply pressure regu-lator and adapter plate:Check whether the diverting gasket(Figs. 3 and 4) is installed and both fix-ing screws are tightened properly.

� Excessive blow-off over the venting bore(3 in Fig. 2):Check whether the diverting gasket(Figs. 3 and 4) is installed correctly.

� The air supply decreases and the outputpressure drops:Check the filter cartridge (9 in Fig. 2) fordirt and make sure the set point is cor-rectly adjusted.

6.1 Spare parts

EB 8546 EN 23

Troubleshooting

Article Order no.Filter

Filter cartridge 20 µmFilter cartridge 5 µm including seal

8504-90278504-9030

Filter receptacle

Filter receptacle, plasticFilter receptacle, aluminumFilter receptacle, stainless steel

1199-04231199-04241199-0425

Filter compatible with paint on request

Seal for filter receptacle 0439-0061Stopper including seal (10 and 10.1 in Fig. 2) 1099-5055Pressure gauge

Pressure gauge, entirely made of stainless steelPressure gauge, made of brass/stainless steel

0089-00090089-0018

Pressure gauge seal 1099-4305

7 Accessories

24 EB 8546 EN

Accessories

Accessories Order no.

Mounting parts for mounting on rail acc. to EN 50022acc. to EN 50035

1400-73411400-7342

Mounting parts for mounting on bracket for Type 3271 or Type 3277 Actuator 1400-7343

Intermediate plate for additional connectionwith Types 4708-10xx/-11xx/-53xx/-55xx/-58xx/-62xx/-64xx (not required for Type 4708-54xx)

Aluminum with G ¼ threadAluminum with ¼ NPT threadStainless steel with G ¼ threadStainless steel with ¼ NPT thread

1400-74001400-74041400-74021400-7406

Intermediate plate for additional connection with Type 4708-57xx Supply Pressure Regulator


1400-74011400-74051400-74031400-7407

Special screw to mount Type 4708-54xx on Type 3710 Reversing Amplifier 1400-7806

Adjustment knob for set point adjustment 1400-7408

Nut for panel mounting 1400-7725

Adapter plate for manual/automatic transfer (Type 4708-82)


1400-96051400-96061400-96071400-9608

Adapter plate (from Type 3710) to mount Type 4708-53 on old models of Types 3733,3767 and 3780 Positioners 1400-9621

8 Dimensions in mm

EB 8546 EN 25

Dimensions in mm

79524339

19

51

4460

90

126

78 (102)

795243

19

51

60 44

182 (206)

Type 4708-11xx/14xx Supply Pressure Regulator

Supply pressure regulators with intermediate plateThe overall height increases by 24 mm for theadditional connection.In this case, the dimensions in parentheses () apply.

Mounting bracket(accessories)


26 EB 8546 EN

Dimensions in mm

0 6

0 6

80 65(89)Output

Supply

51

2570

4708-535.NPT

4459

42

15

116

99

42

44

Ø41

102123

12

59


Type 4708-83xx/84xx/86xx/87xxSupply Pressure Regulator

Type 4708-53xx Supply Pressure Regulatorfor Types 3730/3766/3767/3780/3785/3787 Positioners

EB 8546 EN 27

Dimensions in mm

73

192

111

66

96

19

3

Output

Supply

Type 4708-54xx Supply Pressure Regulatorfor Types 3730/3766/3767/3780/3785/3787 Positioners

Type 4708-55xxfor Types 4763/4765 Positioners

G

60

SAMSON 4763

4708-552.

60

Output

Supply66 (90)55

27

122

Output(reduced supply)

28 EB 8546 EN

Dimensions in mm

99 122133 (157)

Supply

InputSignal

InputSignal

Supply

927

927

47

122

Type 4708-57xx Supply Pressure Regulatorfor Type 3760 Positioner

EB 8546 EN 29

Dimensions in mm

1 38238

GO

utputO

utputS

Input

6

5

43

2

1

0

SAMSON

27

60(84)

Supply

56

111

30

93

74 207

111

125

113

37

125

Supply

G3/8

Type 4708-64xxfor Type 3277 Actuator

Attachment on left or right

Type 4708-58xxfor Type 3761 Positioner

30 EB 8546 EN

Dimensions in mm

06

G47

08-6

22X

Supply

19 94111(135)

11360

Supply113

Type 4708-6221for Type 3372-031x Actuator

7056

56

46

24

82

28

50

13

10

Type 4708-82Manual/automatic transfer unit with adapter plate

EB 8546 EN 31

SAMSON AG · MESS- UND REGELTECHNIKWeismüllerstraße 3 · 60314 Frankfurt am Main · GermanyPhone: +49 69 4009-0 · Fax: +49 69 4009-1507Internet: http://www.samson.de EB 8546 EN S/

Z20

12-0

8

Documents

Mounting and Operating Instructions EB8546 EN Solenoid...Supply Pressure Regulators Type 4708 Mounting and Operating Instructions EB8546 EN EditionJune 2012 Fig. 1 · Supply pressure