Swagelok KPB Series Technical specifications

Poppet
Seat retainer seal
Body seal and spring
Seat retainer
Tool Size Component
Vise
— Body
Socket
5/8 in. or 16 mm Seat retainer
11/16 in. or 17 mm Stem nut
Open-ended wrench
13/16 in. or 21 mm Piston
2 in. or 50 mm Cap ring
Torque wrench
Capable of
100 ft·lb (135 N·m, 13.8 m·kg)
Seat retainer,
cap ring
Crow’s foot
2 in. or 50 mm Cap ring
Thread-locking fluid
—Poppet retainer
Tool Kit
Piston seal insertion tool
—Piston seal and spring
Body seal insertion tool
—Body seal and spring
Piston seal and spring Poppet spring
Piston seal retainer
Kit Contents
KPB Series Regulators
Maintenance Instructions
Tools Required
Symbols
Lightly
lubricate
Discard
NOTE: See Pressure Regulators,
MS-02-230, for tool kit
ordering information.
Lubricant
MS-LT-WL8
Seat support Seat

Exploded View
2
Cover
Stem nut
Knob handle
Body cap
Cap ring
Piston guide
Body seal and
spring
Body
Stem
Upper spring
button
Lower spring
button
Range spring
Spring stabilizer
Seat retainer
Seat
Seat support
Seat retainer seal
Poppet
Poppet spring
Piston
Poppet retainer
Piston seal and spring
Piston seal retainer

WARNING
Before removing a regulator from the system
for service, you must
• depressurizethe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.
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. Set aside for later use.
5. Lightly grip the piston guide in the vise and remove the
body.
NOTICE
Twist the body gently to avoid body seal and spring
damage, which could result in leakage.
Body
Piston guide
Range spring
Lower spring
button
Cap assembly / handle
6. Push the piston assembly out of the piston guide.
7. With the piston assembly inverted, grip the poppet retainer
in the vise and remove the piston.
NOTICE
Protect the poppet retainer from scratches when
gripping it in the vise. Leakage could result.
8. Remove the poppet and the poppet spring from the
poppet retainer.
9. Remove the piston seal and spring and the piston seal
retainer from the piston guide, and the body seal and
spring from the body.
NOTICE
Be careful not to scratch the inside of the piston guide
and the body. Leakage could result.
Piston guide
Piston assembly
Piston seal
and spring
Piston guide
Body
Piston seal
retainer
Body seal
and spring
3
Piston
Poppet
Poppet retainer
Poppet spring
Cap ring

4
Reassembly
NOTICE
Ensure all parts and tools are free of debris or
damage.
11. Insert the seat, the seat support and the seat retainer
seal into the seat retainer.
12. In the inverted position, thread the seat assembly into the
body.
13. Tighten the seat assembly to 13 lb·ft (17.5 N·m, 1.8 m·kg).
14. Insert the poppet into the piston. Place the poppet spring
onto the exposed end of the poppet.
Seat assembly
Body
Seat retainer
seal
Seat support
Seat
Seat retainer
Groove
facing down
Groove
facing up
Poppet
Piston
Poppet spring
10. Loosen and remove the seat retainer assembly.
NOTICE
Be careful not to scratch the inside of the body.
Leakage could result.
Seat retainer
Seat
Seat support
Seat retainer seal

15. Thread the poppet retainer onto the piston.
16. Wrench-tighten the piston into the poppet retainer until it is
fully engaged.
Note: Clean off any excess thread-lock fluid from the piston
and poppet retainer.
NOTICE
Protect the poppet retainer from scratches when
gripping it in the vise. Leakage could result.
17. Insert the bottom of the piston seal insertion tool into
the piston guide. Insert the piston seal and spring into
the piston guide and use the top part of the piston seal
insertion tool to press the seal into place (17A). Then insert
the piston seal retainer, pressing it into place using the top
part of the piston seal insertion tool (17B).
Note: The open end of the piston seal and spring should
be facing up and the chamfer of the piston seal
retainer should be placed against the piston seal and
spring.
18. Push the piston assembly into the piston guide.
19. Insert the bottom of the body seal insertion tool into the
body. Insert the body seal and spring into the body and
use the top part of the body seal insertion tool to press the
seal into place.
20. Push the piston guide onto the body until it fully engages
with the body seal and spring.
21. Insert the range spring into the cap and then the lower
spring button with the point towards the range spring.
5
Range spring
Lower spring
button
Piston guide
Body seal
and spring
Body
Poppet retainer
Piston
Thread -locking
fluid
Piston
Piston
seal
insertion
tool
Open
end up
Piston seal
and spring
17A
Chamfer
facing
down
Piston seal
retainer
17B
Piston guide
Open end
down
Body seal
and spring
Body
Body
seal
insertion
tool
Body
seal
insertion
tool
Piston guide
Piston assembly

22. Thread the cap assembly / handle onto the body with the
lower spring button resting on the piston.
23. Tighten the cap ring to 100 ft·lb (135 N·m, 13.8 m·kg).
24. Test the regulator for proper operation.
6
Body Piston
Cap assembly / handle
For additional information, see www.swagelok.com.
Swagelok — TM Swagelok Company
© 2010, 2015 Swagelok Company
October 2015, R1
MS-CRD-0132
Cap ring