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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 bank bleed valve.
Bank bleed
valve
6.4.6
Disconnect tubing from 1
regulator by loosening the connector.
6.4.7
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.
6.4.8
Using a 51 mm Socket, remove the Spring
Chamber.
1. Adjustment Screw O-ring
Spring Chamber (50 lbf-ft)
Spring Button
2. Piston Diaphragm O-ring
3. Seat Ring w/O-ring (30 lbf-ft)
4. Piston Sub-Assembly
5. Regulator/ Body O-ring
stage pressure
st
Locknut
Spring
6.4.9
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.
6.4.10 Remove Pusher Post Button and set aside.
6.4.11 Using a Plastic Pick, remove the Regulator/ Body
O-ring. Discard O-ring.
6.4.12 Using a 23 mm Socket, remove the Seat Ring by
turning counter-clockwise.
6.4.13 Discard Seat Ring w/O-ring.
6.4.14 Remove Piston Sub-Assembly and discard.
6.4.15 Verify the Piston Spring remains in place within
regulator body.
6.4.16 Insert new Piston Sub-Assembly.
6.4.17 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 30
lbf-ft.
6.4.18 Assemble Pusher Post Button.
6.4.19 Insert new Regulator/Body O-ring. Use care to
place uniformly in groove.
stage
st
6.4.20 Using Plastic pick, remove old O-ring from Piston
Diaphragm and install new one included in kit.
6.4.21 Stack Piston Diaphragm, Spring and then the
Spring Button together.
6.4.22 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.
6.4.23 Assemble Spring Chamber to the Regulator
Body. Tighten to 50 lbf-ft.
6.4.24 Using a Plastic Pick, remove the Adjustment
Screw O-ring. Discard O-ring.
Piston
6.4.25 Assemble new Adjustment Screw O-ring.
Diaphragm
6.4.26 Put Locknut on Adjustment Screw and assemble
Pusher Post
to Spring Chamber.
Button
6.4.27 Turn the Adjustment Screw until desired set
Piston
pressure.
Spring
6.4.28 Tighten the locknut.
6.4.29 Verify the manifold operation. Refer to Section
3.4
41
Using a Screwdriver, insert into top of Spring
4109992459.00
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