Swagelok KHR Series Caractéristiques techniques

Symbols

Lightly lubricate

Discard

Kit Contents

KHR Series Regulators

Maintenance Instructions

Poppet damper

Lubricant

MS-LT-WL8

Outer body seal

Seat retainer

Upper piston seal

Self-vent seat Self-vent poppet

Seat

Inner body seal

Poppet spring

Inlet Filter

Self-vent seat retainer

Piston vent seal Self-vent poppet spring

Poppet

Main piston sealPiston seal backup ring

NOTE: See Pressure Regulators, MS-02-230, for tool ordering information.

Tool Size Component

Vise

-Body

Socket

5/8 in. or 16 mm Seat retainer

Crow’s foot

1 5/8 in. or 41 mm Body cap

3/4 in. or 19 mm Vent assembly retainer nut

Open-ended wrench

1 5/8 in. or 41 mm Body cap

3/4 in. or 19 mm Vent assembly retainer nut

Torque wrench

Capable of

129 ft·lb (175 N·m, 17.9 m·kg)

Seat retainer,

Body cap,

Vent assembly retainer nut

Hex key

1/8 in. or 3 mm Vent screw,

Upper spring button set screw

Needle-nose pliers

-Knob handle retainer

Swagelok Tools Available

Vent retainer tool

-Self-vent seat retainer

Piston assembly bar

- Piston

Filter insertion tool

—Inlet filter

Filter pick tool

—Inlet filter

Tools Required

Exploded View

Seat Assembly

Self-Vent Assembly

Stem Assembly

Cover

Handle retainer

Handle

Outer body seal

Body

Seat retainer

Seat

Stem

Upper spring

button

Piston seal backup ring

Upper piston seal

Piston

Poppet damper

Poppet spring

Poppet

Upper

spring

button

set

screw

Stem nuts

Lower spring

button

Range spring

Thrust roller

bearing

Piston guide

Body cap

Self-vent poppet

Self-vent poppet spring

Self-vent seat retainer

Self-vent seat

Inlet lter

Vent rod / screw

Vent screw spring

Vent rod nut

Main piston seal

Piston vent seal

Inner body seal

5. Remove the body cap from the body.

Note: The range spring and the lower spring button may

fall from the body cap. Set aside for later use.

6. Remove the piston guide from the body by pinching the

piston top with your ngers and gently rocking it.

7. Lightly grip the piston guide in the vise and remove the

self-vent seat retainer from the piston guide using the

piston assembly bar and the vent retainer tool. The

piston assembly bar must be held still.

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. Remove

the cover, the handle retainer and then pull the handle

from the body.

Note: Use needle-nose pliers to remove the handle retainer.

3. Remove the vent screw / rod and vent screw spring from

the stem, and set aside for later use.

4. Loosen the body cap.

Body cap

Handle

Handle retainer

Cover

Body cap

Range spring

Lower spring

button

Body

Stem

Piston assembly bar

Piston guide

Vent retainer tool

Piston guide

Body

Piston

12. Loosen and remove the seat retainer. Discard the seat

and seat retainer.

NOTICE

Be careful not to scratch the inside of the body.

Leakage could result.

13. Invert the body and remove the poppet, the poppet

spring, and the poppet damper.

14. Remove the inlet filter using the filter pick tool or similar

tool, and remove the filter from the inlet port (marked

‘HP’) of the body.

NOTICE

Be careful not to scratch the sides of the inlet

port. Leakage could result.

8. Remove the self-vent poppet spring, the self-vent

poppet and the self-vent seat from the piston guide.

9. Push the piston out of the piston guide.

10. Grip the vent rod nut in the vise, and loosen and remove

the nut by using the piston assembly bar. Set aside the

nut for later use. Remove the piston vent seal from the

piston.

11. Remove the upper piston seal from the top of the piston

guide, and the main piston seal and the piston seal

backup ring through the bottom of the piston guide.

Remove the outer body seal and the inner body seal

from the body.

Self-vent seat

Self-vent poppet

Self-vent poppet spring

Piston guide

Piston

assembly bar

Inlet port

Filter pick tool

Discard

inlet lter

Poppet damper

Poppet

Poppet spring

Outer body seal

Body

Inner body seal

Piston guide

Main piston seal

Piston seal backup ring

Upper piston

seal

Body

Seat retainer

Seat

Piston vent seal

Piston

Reassembly

NOTICE

Ensure all parts and tools are free of debris or

damage.

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

away from the seat retainer.

16. Place the poppet through the seat. Then place the poppet

spring and the poppet damper onto the exposed end of

the poppet.

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

nger-tight.

18. Tighten the seat assembly to:

for non-metallic seat: 13 ft·lb (17.5 N·m, 1.8 m·kg)

for metallic seat: 26 ft·lb (35.0 N·m, 3.7 m·kg)

19. Insert the inlet filter using the filter insertion tool into the

inlet (marked ‘HP’) of the body.

NOTICE

Do not insert with sharp tools. Damage to ﬁlter

could result.

20. Insert the upper piston seal into the groove in the top of

the piston guide. Insert the piston seal backup ring,

followed by the main piston seal through the bottom of

the piston guide. Insert the outer body seal and inner

body seal into the body.

21. Insert the piston vent seal and thread the vent rod nut

into the piston.

22. Invert the piston and insert the self-vent seat with the

groove facing away from the piston. Then insert the

self-vent poppet and the self-vent poppet spring into

the piston. Finger-tighten the self-vent seat retainer into

the piston using the vent retainer tool.

Seat assembly

Body

Seat

Seat retainer

Groove

Self-vent seat

Piston

Self-vent poppet

Self-vent poppet spring

Vent retainer tool

Self-vent seat retainer

Groove

Poppet

Poppet spring

Poppet damper

Seat

Piston vent seal

Vent rod nut

Piston

Outer body seal

Body

Inner body seal

Piston

guide

Upper piston seal

Main piston seal

Piston seal

backup ring

Apply non-permanent

thread locking uid.

Filter insertion tool

Inlet lter

Inlet

Body

23. Grip the vent rod nut in the vise and tighten to 3.5 ft·lb

(5N·m, 0.5 m·kg).

24. Lightly grip the piston guide in the vise and insert the

piston assembly into the piston guide. Then tighten the

self-vent seat retainer to 7 ft·lb (10 N·m, 1.0 m·kg) using

the piston assembly bar and vent retainer tool.

NOTICE

Do not force the piston assembly into the piston

guide. Damage to the seals could result.

25. Insert the piston guide into the body. Lightly press down

on the piston guide until it is fully seated.

NOTICE

Do not pinch the body seals. Damage could

result.

26. Place the range spring and the lower spring button into

the body cap. Thread the body cap nger-tight into the

body in the inverted position.

27. Tighten the body cap to 129 ft·lb (175 N·m, 17.8 m·kg).

28 Place the handle and the handle retainer on the body

cap.

Piston assembly bar

Vent retainer tool

Piston guide

Handle

Handle retainer

Body cap

Vent retainer tool

Piston guide

Body

Body cap

Body

Lower

spring

button

Range

spring

29. Insert the vent screw spring into the stem. Thread the

vent rod / screw three or four turns onto the stem. Do not

fully tighten.

30. Test regulator for proper operation.

31. Apply 50 to 100 psig (3.4 to 6.8 bar) to the LP port, tighten

the vent screw until leakage is heard, and then loosen by

one-half turn.

Swagelok — TM Swagelok Company

October 2015, R3

MS-CRD- 0141

For additional information, see www.swagelok.com.

32. Place the cover on the handle

Cover

Handle

Vent screw spring

Vent rod / screw

Body cap

Stem

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