NOTE:
The regulator has
directional gas flow.
The arrow on the
regulator body must
point in direction
indicated in the Bench
Adjustment Fixture
illustration.
Regulator Removal or Replacement Procedure
1. Close manual Pressure Building Valve.
2. Vent the container to atmospheric pressure.
2
3. Loosen and remove both the tube connections on the pressure building and econo-
mizer output sides on the regulator.
4. Remove the regulator from the container by unscrewing the valve body and elbow from
the output of the Pressure Building Valve.
5. Repair the regulator and readjust its setpoint using the bench test setup.
6. To install a replacement or re-adjusted regulator, apply Teflon apply Teflon tape to the
elbow on the container and thread the valve body onto the elbow.
7. Reconnect the tube connections to the regulator and tighten.
8. Pressurize the container and check it for leaks.
Regulator Adjustment – Bench Procedure
Assemble the regulator adjustment fixture, and then the regulator to be adjusted, as
shown in the accompanying illustration.
1. Leak test joints between the high pressure cylinder regulator and the dump valve.
Joints must be leak free before proceeding.
2. Close the On/Off valve, and then the Dump Valve.
3. Slightly open the high pressure cylinder valve.
4. Set the high pressure regulator above the desired set point for the Pressure Building
setpoint.
5. Slowly open the On/Off valve and observe the downstream pressure gauge.
6. When the regulator under test closes, the P.B. set point may be read on the down-
stream pressure gauge.
7. Close the On/Off valve and open the Dump Valve.
8. To reset the regulator, loosen the lock nut on the adjusting screw. Raise the set point
by turning the adjusting screw clockwise; lower the setpoint by turning the screw
counterclockwise. After adjustment, repeat steps 5 & 6 to check the setting before
reinstalling the regulator on the liquid container.
Regulator
Bench
Adjustment
Fixture
2
For units in CO
2
service, see caution for releasing pressure at the beginning of the Maintenance Section.
NOTE:
The economizer
portion of the
regulator will open
approximately 20 psig
(1.4 bar/138 kPa)
higher than the
pressure building
setpoint.
