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Medical Gas Supply System
6.4.5
Vent pressure from bank that was shut off in
step 1 by pressing the service relief valve.
Service
Relief Valve
6.4.6
Disconnect tubing from 1
regulator by loosening the connector.
6.4.7
Using a 2" Socket, remove the Spring Chamber.
6.4.8
Using a 19 mm wrench, turn the 1
pressure regulator Adjustment Screw counter-clockwise
to release all spring tension. Remove Adjustment Screw/
Locknut and set aside in clean area.
6.4.9
Using a 51 mm Socket, remove the Spring
Chamber.
1. Adjustment Screw O-ring
Spring Chamber (50 FT-LBS)
Spring Button
2. Piston Diaphragm O-ring
3. Seat Ring w/O-ring (30 FT-LBS)
4. Piston Sub-Assembly
5. Regulator/ Body O-ring
stage pressure
st
Locknut
Spring
6.4.10 Using a Screwdriver, insert into top of Spring
Chamber past Adjustment Screw threads and push on
the Spring Button to push out Piston Diaphragm, Spring
and Spring Button. Set components aside in a clean area.
6.4.11 Remove Pusher Post Button and set aside.
6.4.12 Using a Plastic Pick, remove the Regulator/ Body
O-ring. Discard O-ring.
6.4.13 Using a 23 mm Socket, remove the Seat Ring by
turning counter-clockwise.
6.4.14 Discard Seat Ring w/O-ring.
6.4.15 Remove Piston Sub-Assembly and discard.
6.4.16 Verify the Piston Spring remains in place within
regulator body.
6.4.17 Insert new Piston Sub-Assembly.
6.4.18 Install new Seat Ring by screwing it in by hand
while pressing in on the Piston Sub-Assembly. Once
hand tight, use torque wrench to finish tightening to 40
Nm.
6.4.19 Assemble Pusher Post Button.
6.4.20 Insert new Regulator/Body O-ring. Use care to
place uniformly in groove.
stage
st
6.4.21 Using Plastic pick, remove old O-ring from Piston
Diaphragm and install new one included in kit.
6.4.22 Stack Piston Diaphragm, Spring and then the
Spring Button together.
6.4.23 Place Spring Chamber on top of these
components to capture them. The O-ring on the Piston
Diaphragm should hold all the components in the Spring
Chamber.
6.4.24 Assemble Spring Chamber to the Regulator
Body. Tighten to 68 Nm.
6.4.25 Using a Plastic Pick, remove the Adjustment
Screw O-ring. Discard O-ring.
6.4.26 Assemble new Adjustment Screw O-ring.
Piston
Diaphragm
6.4.27 Put Locknut on Adjustment Screw and assemble
to Spring Chamber.
Pusher Post
Button
6.4.28 Turn the Adjustment Screw until desired set
pressure.
Piston
Spring
6.4.29 Tighten the Locknut.
6.4.30 Verify the manifold operation.
35
4109992485.00
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