Swagelok KPF Series Caractéristiques techniques

Kit Contents

KPF Series Regulators

Maintenance Instructions

Poppet seal and spring

Symbols

Lightly lubricate

Discard

Seat

Seat retainer

Body seal

Piston seal and spring

Piston seal retainer

Lubricant

MS-LT-WL8

Poppet

Spring retainer

Inlet lter

Poppet spring

Poppet seal retainer

Note: See Pressure

Regulators,

MS-02-230, for

tool kit ordering

information.

Tool Size Component

Vise

-Body

Socket

11/16 in. or 17 mm Stem nut,

Antitamper nut

Crow’s Foot

3/4 in. or 19 mm Seat retainer spanner

Open-ended wrench

3/4 in. or 19 mm Seat retainer spanner

Torque wrench

Capable of

120 ft·lb (160 N·m, 16.5 m·kg) Cap ring spanner

Swagelok Tools Available

Large cap ring spanner

2 7/8 in. or 73 mm Cap ring

Seat retainer spanner

-Seat retainer

Poppet seal insertion tool

-Poppet seal and spring

Piston seal insertion tool

-Piston seal and spring

Seal extraction tool

-Poppet seal and spring

Filter insertion tool

-Inlet filter

Filter pick tool

-Inlet filter

Tools Required

Exploded View

Stem

Spring stabilizer

Range spring

Cover

Stem nut

Inlet lter

Cap ring

Handle

Body

Piston guide

Body seal

Upper spring button

Lower spring button

Piston seal and spring

Piston seal retainer

Piston

Seat retainer

Seat

Poppet

Poppet spring

Poppet seal retainer

Poppet seal and spring

Spring retainer

Body cap

Note: Plated steel spring buttons shown.

WARNING

Before removing a regulator from the system for

service, you must

• depressurize system

• purge the system to remove any residual

system media left in the regulator.

Disassembly

1. Place the regulator in a vise.

2. Turn the handle counterclockwise until it stops.

Note: If using an antitamper nut, remove it from the body.

Then turn the stem counter clockwise until it stops.

3. Loosen the cap ring.

4. Remove the cap assembly and handle as one piece and set

aside for later use.

Note: The range spring and the lower spring button may

fall from the cap assembly when lifted. Set aside for

later use.

5. Remove the piston assembly from the body.

6. Push the piston out of the piston guide.

7. Remove the body seal, the piston seal retainer, and the

piston seal and spring from the piston guide. Set the

piston guide aside for later use.

NOTICE

Do not damage the piston guide sealing surfaces.

Leakage could result.

8. Use the seat retainer spanner to loosen the seat

assembly. Discard the seat retainer, the seat, the

poppet, the spring retainer, the poppet spring and the

poppet seal retainer.

Cap ring

Handle

Large cap ring

spanner

Piston assembly

Body

Cap assembly

Range spring

Lower spring

button

Piston

Piston guide

Piston seal and spring

Piston seal retainer

Body seal

Seat retainer spanner

Seat retainer

Seat

Body

Poppet

Spring retainer

Poppet spring

Poppet seal retainer

9. Thread the seal extraction tool into the body and remove the

poppet seal and spring.

10. Remove the inlet lter from the inlet port (marked ‘HP’)

using the lter pick tool. Discard old lter.

NOTICE

Be careful not to scratch the sides of the inlet

port. Leakage could result.

Reassembly

NOTICE

Ensure all parts and tools are free of debris or

damage.

11. Insert the inlet filter into the inlet port (marked ‘HP’) using

the filter insertion tool.

NOTICE

Do not insert the inlet lter with a sharp tool.

Damage to the lter could result.

12. Insert the poppet seal and spring into the body using the

poppet seal insertion tool with the open end of the poppet

seal and spring facing up.

13. Insert the seat into the seat retainer with the groove facing

away from the seat retainer.

14. Place the poppet through the seat. Then place the spring

retainer, the poppet spring and the poppet seal retainer

onto the exposed end of the poppet.

15. Invert the body and thread the seat assembly into the

body.

Spring retainer

Poppet spring

Poppet

Poppet seal retainer

Seat

Seat assembly

Body

Seat

Seat retainer

Groove

Body

Poppet seal

and spring

Poppet seal

Insertion tool

Open end up

Body

Poppet seal and spring

Seal extraction tool

Filter pick tool

Discard

inlet lter

Inlet

Filter insertion tool

Inlet

Inlet lter

Swagelok — TM Swagelok Company

March 2019, RevC

MS-CRD-0139

For additional information, see www.swagelok.com.

20. Place the piston assembly on the body.

NOTICE

Do not damage the sealing surface on the body.

Leakage could result.

21. Reinsert the lower spring button into the cap assembly

with the point towards the range spring if necessary.

22. Thread the cap assembly onto the body and tighten the

cap ring to 120 ft·lb (160 N·m, 16.5 m·kg).

23. Test the regulator for proper operation.

24. If using an antitamper nut, thread the antitamper nut onto

the stem after the set outlet pressure is reached. Tighten

the nut to 13 ft·lb (17.5 N·m, 1.8 m·kg).

Piston guide

Body seal

Piston

Piston guide

16. Tighten the seat assembly to 30 ft·lb (40 N·m, 4 m·kg).

17. Set lower section of the piston seal insertion tool on the

piston guide. Place the piston seal and spring into the

insertion tool. Use upper section of insertion tool to press

the piston seal and spring into place (18A). Then place the

piston seal retainer into the lower section of the insertion

tool. Use the upper section of insertion tool to press the

piston seal retainer into place (18B).

Note: The open end of the piston seal and spring should

be facing up and the chamfer of the piston seal

retainer should face down.

18. Fit the body seal into the groove on the piston guide.

19. Push the piston into the piston guide.

Piston

seal

Insertion

tool

Piston seal

and spring

Piston seal

retainer

Open end up

18 A

Chamfer

facing down

18 B

Piston assembly

Body

Seat retainer spanner

Range spring

Cap assembly

Lower spring button

Cap ring

Large cap ring spanner

Piston

guide

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