Swagelok KHB Series Technische Daten

Kit Contents

KHB Series Regulators

Maintenance Instructions

Body seal

Seat retainer

Piston seal

Poppet retainer seal

Seat support seal

Poppet

Tool Size Component

Vise

-Body

Socket

5/8 in. or 16 mm Seat retainer

Crow’s foot 3/4 in. or 19 mm Vent assembly retainer nut

1 5/8 in. or 41 mm Body cap

Open-ended wrench 3/4 in. or 19 mm Vent assembly retainer nut

1 5/8 in. or 41 mm Body cap

Torque wrench

Capable of

129 ft·lb (175 N·m)

Seat retainer,

Body cap

Retaining ring pliers

-Knob handle retainer

Tool Kit

Vent assembly retainer nut

-Poppet retainer

Piston assembly bar

- Piston

Tools Required

Poppet spring

Seat

Lubricant

MS-LT-WL8

Seat support

Symbols

Lightly

lubricate

Discard

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

Exploded View

Stem assembly

Seat retainer assembly

Poppet assembly

Cover

Knob handle retainer

Knob handle

Body seal

Body

Seat retainer

Seat

Seat support

Seat support seal

Stem

Upper spring

button

Backup ring

Piston seal

Piston

Poppet retainer seal

Poppet spring

Poppet

Poppet retainer

Upper

spring

button

set

screw

Stem nuts

Lower spring

button

Range spring

Thrust roller

bearing

Piston guide

Body cap

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 knob handle counterclockwise until it stops.

Remove the cover, the knob handle retainer and the knob

handle from the body.

Note: Use retaining ring pliers to remove the knob handle

retainer.

3. Loosen the body cap.

4. Remove the cap assembly from the body.

Note: The range spring and the lower spring button may

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

Knob handle

Knob handle retainer

Cover

5. Remove the piston / guide assembly from the body

by pinching the piston top with your ngers and rocking

gently.

6. Lightly grip the piston guide in the vise and loosen the

poppet retainer from the piston / guide assembly using

the piston assembly bar and the vent retainer assembly

nut. The piston assembly bar has to be held still.

7. Remove the poppet, followed by the poppet spring and

the poppet retainer seal from the piston / guide assembly.

8. Push the piston out of the piston guide.

Piston / guide assembly

Body

Vent retainer

assembly nut

Piston assembly bar

Piston guide

Cap assembly

Range spring

Lower spring

button

Body cap

Piston guide

Piston

Piston guide

Piston

Poppet retainer seal

Poppet

Poppet spring

18. Insert the piston / guide assembly into the body. Lightly

press down on the piston guide until it is fully seated.

NOTICE

Do not pinch the body seal. Damage could result.

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

the body cap. Then thread the cap assembly into the

body in the inverted position.

20. Tighten the cap to 129 ft·lb (175 N·m).

15. Invert the piston and insert the poppet retainer seal,

followed by the poppet spring, the poppet and the poppet

retainer.Use the vent retainer assembly nut to tighten the

poppet retainer nger-tight.

16. Insert the backup ring and the piston seal into the piston

guide, and the body seal into the body.

17. Insert the piston assembly into the piston guide. Lightly

grip the piston guide in a vise and tighten the poppet retainer

to 7 ft·lb (10 N·m).

NOTICE

Do not force the piston assembly into the piston guide.

Damage to the seals could result.

Piston guide

Piston assembly bar

Piston / guide assembly

Body

Piston guide

Backup ring

Piston seal

Body

Body seal

Poppet

retainer Poppet

Poppet

spring

Piston

Vent retainer

assembly nut

Poppet

retainer seal

Body

Cap assembly

Lower spring

button

Range spring

9. Remove the piston seal and the backup ring from the

piston guide, and the body seal from the body.

10. Loosen and discard the seat retainer assembly.

NOTICE

Be careful not to scratch the inside of the body.

Leakage could result.

11. Remove and discard seat retainer assembly from the

body.

NOTICE

Be careful not to scratch inside of body. Leakage could

result.

Reassembly

NOTICE

Ensure all components and tools are free of

debris or damage. Leakage could result.

12. Insert the seat into the seat retainer with the groove

towards the seat retainer. Press the seat support seal

onto the seat support and insert the assembly into the

seat retainer.

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

body.

14. Tighten the seat assembly to 13 ft·lb (17.5 N·m).

Seat support

seal

Groove

facing down

Seat retainer

Seat

Body

Seat assembly

Piston guide

Backup ring

Piston seal

Body seal

Body

Seat retainer

assembly

Body

Swagelok — TM Swagelok Company

October 2019, RevC

MS-CRD-0135

For additional information, see www.swagelok.com.

21. Place the knob handle on the cap. Then insert the knob

handle retainer and the cover.

Note: If necessary, turn the knob handle one or two turns

clockwise to position it properly on the stem.

22. Test the regulator for proper operation.

Knob handle

Knob handle retainer

Cover

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