Cash Valve Type G-60 1-1/4” & 1-1/2” Cryogenic Pressure Regulator Installation guide

Cash Valve Type G-60 1-1/4” & 1-1/2” Cryogenic Pressure Regulator Installation guide
CASH VALVE TYPE G-60 ¼” TO 1½” FOR CRYOGENIC SERVICE
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
Before installation, these instructions must be carefully read and understood.
valve body. Use a compatible sealant on the
male pipe threads and do not over tighten the
valve connections.
2.
CONSTRUCTION
See component description for materials of
construction.
3.
All parts commercially cleaned for oxygen
service.
4.
OPERATING INSTRUCTIONS
DESCRIPTION
The Type G-60 regulator is a fully automatic
pressure regulating valve designed for
cryogenic service in the pressure build-up
circuit. Because it may be used for either
cryogenic liquids or gases, it may be installed
either before or after the pressure build-up
coil.
SPECIFICATION DATA
Service: Cryogenic liquids and gases (pressure
reducing or pressure build-up service).
Sizes: ¼” to 1½”
Connections: NPT threads internal inlet and
outlet.
Body Material: Bronze or Stainless Steel.
Temperature Rating: +150°F (65°C) to
-320°F (-195°C)
Maximum Initial Pressure:
600 psi (41.4 bar)
INSTALLATION INSTRUCTIONS
The Type G-60 regulator should be installed in
the horizontal position with the spring chamber
upright. For other installation requirements
consult the factory. For ease of operation and
maintenance, it is suggested that manual
shut-off valves be installed upstream and
downstream from the valve. Before installing
the valve, the piping and valve should be
thoroughly flushed out to remove any foreign
material. Install the valve with the inlet pipe
fitted to the inlet connection identified on the
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Adjusting the Delivery Pressure:
The regulator’s delivery pressure setting is
adjusted by turning the adjusting screw (2)
(after removing optional cap (1)) at the top
of the spring chamber (5) after loosening
the adjusting screw lock nut (3). To increase
the delivery pressure, turn the adjusting
screw clockwise (into the spring chamber).
To decrease the delivery pressure, turn the
adjusting screw counter-clockwise (out of the
spring chamber). Tighten the adjusting screw
lock nut after the adjustment has been made
(and reinstall optional cap).
MAINTENANCE INSTRUCTIONS
CAUTION
Before attempting to replace any spare parts,
be sure to shut off all pressure connections to
the valve. With the valve closed however, system
pressure could still be locked between the shut
off valve and the inlet and/or outlet sides of the
regulator. Before proceeding with any valve
service, be certain to relieve the pressure from
both sides of the regulator.
Refer to section view for parts identification.
Repair parts can easily be installed without
removing the regulator from the line.
Servicing Diaphragm(s) and Pressure Spring
1. Loosen the lock nut and turn the adjusting
screw counterclockwise until the pressure
spring is no longer under tension. When
reassembling, run the adjusting screw down
until the lock nut almost touches the spring
© 2018 Emerson. All rights reserved.
5.
6.
chamber. This will give you approximately
the same set as before disassembly.
Remove the assembly screws securing
the spring chamber to the body. During
reassembly, tighten the screws evenly in a
star pattern.
Remove the spring chamber. Then remove
the spring button, pressure spring, and
pressure plate.
Remove the diaphragm(s) and diaphragm
gasket (a diaphragm gasket is only
present when construction calls for metal
diaphragms)
Remove the pusher post button. During
reassembly, ensure the pusher post button
is centered properly on the pusher post.
Inspect all parts for wear and damage and
replace if necessary. Reassemble parts
in reverse order. DO NOT OVERTIGHTEN.
Follow the Operation Instructions to reset
the delivery pressure.
Servicing the Piston, Seat Ring and Plug
Gasket
1. Loosen the lock nut and turn the adjusting
screw counterclockwise until the pressure
spring is no longer under tension. When
reassembling, run the adjusting screw down
until the lock nut almost touches the spring
chamber. This will give you approximately
the same set as before disassembly.
2. Remove the bottom plug. Take care, as the
bottom plug is under slight tension as a
result of the piston spring acting against the
bottom plug. During reassembly, tighten the
screws evenly in a star pattern.
3. Remove the piston and piston spring.
4. Flush the valve body to remove any debris.
5. Remove the hexagon seat ring. When
reassembling, torque the seat ring to
350 in-lbs.
6. Inspect all parts for wear and damage. If
either the seat ring or piston need replacing,
it is necessary to replace both as both parts
wear equally.
7. Reassemble the valve in reverse order. DO
NOT OVERTIGHTEN. Follow the Operation
Instructions to reset the delivery pressure.
VCIOM-10783-EN 20/05
CASH VALVE TYPE G-60 ¼” TO 1½” FOR CRYOGENIC SERVICE
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
No.
Component
Description
Construction
1
Adjusting Screw Cap
(Optional)
Brass
2
Adjusting Screw
SST
3
Lock Nut
SST
4
Gasket (Optional)
Polypropylene
5
Spring Chamber
Bronze or SST
6
Spring Button
Brass
7
Pressure Spring
SST
8
Nameplate
Aluminum
9
Drive Screw
Pressure Plate
Bronze
Screw
SST
Diaphragm
SST, Bronze or
Buna-N (w/ Teflon
Liner)
Gasket
2
4
5
6
7
8
9
12
10
13
11
14
15
SST
10
13
1
3
11
12
FIGURE 1
16
17
18
19
20
21
22
11
23
Teflon
14
Pusher Post Button
SST or Brass
15
Guide Bushing
SST
16
Pusher Post
SST or Brass
17
Seat Ring
SST
18
Seat Disc
Teflon, Viton or
Kel-F
19
Piston
SST or Brass
20
Body
SST or Bronze
21
Gasket
Teflon
22
Piston Spring
SST
23
Bottom Plug
SST or Bronze
D104628X012 © 2019, 2020 Emerson Electric Co. All rights reserved 04/20. Cash Valve is a mark owned by one of the companies in the Emerson Automation
Solutions business unit of Emerson Electric Co. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their
prospective owners.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be
construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed
by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time
without notice.
Emerson Electric Co. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance
of any Emerson Electric Co. product remains solely with the purchaser.
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