Swagelok KFB Series Technische Daten

Kit Contents

KFB Series Regulators

Maintenance Instructions

Lubricant

MS-LT-WL8

Seat retainer

Tools Required

Seat

Diaphragm

Tool Size Component

Vise

-Body

Socket

18 mm Seat retainer

11/16 in. or 17 mm Antitamper nut

Torque wrench

Capable of

236 ft·lb (320 N·m, 32.7 m·kg))

Seat retainer,

Cap ring

Tool Kit

Large cap ring spanner

2 7/8 in. or 73 mm Cap ring

Retainer seal

Symbols

Lightly lubricate

Discard

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

Exploded View

Seat Assembly

Cover

Stem nut

Handle

Body Seat retainer

Seat

Retainer seal

Stem

Spring button

Spring stabilizer

Range spring

Diaphragm

Stop plate

Cap ring

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 handle counterclockwise until it stops.

Note: Handle and stem nut position are factory set. If

they are removed, they will have to be reset to that

position.

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 may fall from the cap assembly

when lifted. Set aside for later use.

5. Remove the diaphragm and the stop plate.

NOTICE

Do not damage the diaphragm sealing face on the

body. Leakage could result.

6. Loosen and remove the seat assembly. Discard the seat,

seat retainer, and the retainer seal.

NOTICE

Be careful not to scratch the inside of the body.

Leakage could result.

Cap ring

Handle

Large cap ring spanner

Diaphragm

Stop plate

Body

Seat retainer

Seat

Body

Retainer seal

Cap assembly

Range spring

Swagelok — TM Swagelok Company

March 2019, RevC

MS-CRD-0133

For additional information, see www.swagelok.com.

Reassembly

NOTICE

Ensure all parts and tools are free of debris or

damage.

7. Insert the retainer seal with the groove facing away from

the seat retainer and the seat into the seat retainer.

8. Fully thread the seat assembly into the body.

9. Tighten the seat assembly to 30 ft·lb (40 N·m, 4 m·kg).

10. Install the diaphragm with the large leading convolution

facing towards the body.

Seat assembly

Body

Diaphragm

Body

Large leading convolution

11. Install the stop plate onto diaphragm with the boss on

the stop plate facing away from the diaphragm.

12. Reinsert the range spring into the cap assembly if

necessary.

13. Thread the cap assembly onto the body and tighten the

cap ring to 236 ft·lb (320 N·m, 32.7 m·kg).

14. Test the regulator for proper operation.

15. 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).

Seat retainer

Retainer seal

Seat

Groove Range spring

Cap assembly

Stop plate

Diaphragm

Boss

Cap ring

Large cap ring spanner

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