GB-K Gas Booster Package Operation and Maintenance Manual
Page 17
© 1998 - 2000
DH Instruments, Inc
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p
Plug the high pressure outlet circuit to prevent gas flow (circuit is dead ended).
q
Adjust the High Pressure Outlet Regulator (7) by rotating the knob clockwise until the
desired pressure is indicated on the High Pressure Outlet Gauge (4). To correctly set the
pressure, gas flow must not occur. If flow is present in the circuit when the regulator is
adjusted, the pressure will increase when flow is reduced. If the setpoint is exceeded,
see Section 3.3.2.
3.3.2
DECREASING PRESSURE
The High Pressure Outlet Regulator (7) is a venting type. Therefore, it is possible to regulate
pressure down without gas flow through the regulator.
n
Adjust the pressure down using the High Pressure Outlet Regulator (7) by rotating the
knob counter-clockwise until a pressure below the setpoint is achieved as indicated on
the High Pressure Outlet Gauge (4).
o
Set the pressure to the final setpoint by rotating the knob clockwise until the desired
pressure is indicated on the High Pressure Outlet Gauge (4).
3.4
SETTING HIGH PRESSURE OUTPUT ABOVE SUPPLY PRESSURE
All previous sections (especially Section 2.3) should be read, understood and instructions carried out
before continuing.
Emergency shut-down of the gas booster pump can be performed at any time by closing the Shop
Drive Air Shut-off Valve (11). This will prevent further generation of gas pressure by the pump but WILL
NOT NECESSARILY reduce pressure to high pressure point-of-use.
All regulators should be adjusted in the increase direction due to hysteresis in the regulators.
Should a regulator be adjusted from a higher pressure to a lower pressure, once gas begins to flow in
the regulator the pressure ultimately set by the regulator will be lower than that initially set. To avoid
this situation, set the initial pressure below the setpoint, then adjust the regulator up to the
final setpoint.
3.4.1
SETTING BOOSTER DRIVE PRESSURE
n
Close the Shop Drive Air Shut-off Valve (11).
o
Close the High Pressure Outlet Regulator (7) by rotating the knob counter-clockwise until
no spring force is felt.
