2
CASH VALVE™
TYPE B ¼" TO 2" FOR CRYOGENIC SERVICE
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
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
chamber. This will give you approximately
the same set as before disassembly.
2. Remove the assembly screws securing
the spring chamber to the body. During
reassembly, tighten the screws evenly
in a star pattern. See Chart below for
torque values.
3. Remove the spring chamber. Then remove
the spring button, pressure spring, and
pressure plate.
4. Remove the diaphragm(s) and diaphragm
gasket (a diaphragm gasket is only
present when construction calls for
metal diaphragms).
5. Remove the pusher post button. During
reassembly, ensure the pusher post button
is centered properly on the pusher post.
6. 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 Cylinder, Piston,
Strainer Screen, 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. Remove the piston, piston
spring, and strainer screen.
3. Thoroughly clean the strainer screen and
remove any debris from the valve body.
4. Remove the hexagon cylinder.
5. Inspect all parts for wear and damage. If
either the cylinder or piston need replacing,
it is necessary to replace both as both parts
wear equally.
6. Reassemble the valve in reverse order. DO
NOT OVERTIGHTEN. Follow the Operation
Instructions to reset the delivery pressure.
Valve Size, In. (mm)
Assembly Screw Torque Value, In-lbs (N•m)
1
/
4
(6.35)
100 (11.3)
3
/
8
(9.53)
150 (16.9)
1
/
2
(12.7)
200 (22.6)
3
/
4
(19.1)
200 (22.6)
1 (25.4)
250 (28.2)
1
1
/
4
(31.8)
350 (39.5)
1
1
/
2
(38.1)
350 (39.5)
2 (50.8)
350 (39.5)
OPERATING INSTRUCTIONS
Adjusting the Delivery Pressure
The regulator’s delivery pressure setting is
adjusted by turning the adjusting screw (1)
at the top of the spring chamber (5) after
loosening the adjusting screw lock nut (2).
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.
