Swagelok KHB Series Technical specifications

1
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.

2
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

3
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

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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

5
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
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

6
Swagelok — TM Swagelok Company
© 2010-2019 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