Swagelok KPF Series Technical specifications

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
2

Exploded View
3
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
4
Piston assembly
Body
Cap assembly
Range spring
Lower spring
button
Piston
Piston guide
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
5
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
HP
Discard
inlet lter
Inlet
Filter insertion tool
HP
Inlet
Inlet lter

Swagelok — TM Swagelok Company
© 2010-2019 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
6
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