GB-K Gas Booster Package Operation and Maintenance Manual
Page 15
© 1998 - 2000
DH Instruments, Inc
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3.1.5
GAUGES
There are three gauges in the unit used to indicate the Shop Drive Air Pressure, Low
Pressure Outlet and High Pressure Outlet settings.
1.
The Shop Drive Air Pressure Gauge (9) is constructed of brass and is 1.5 in. (38 mm) in
diameter with a range of 0 to 1.38 MPa (200 psig). It is used to indicate the output
pressure of the Shop Drive Air Regulator (10) supplying gas to the air drive section of the
gas booster pump.
2.
The Low Pressure Outlet Gauge (5) is constructed of stainless steel and is 2 in. (51 mm)
in diameter with a range of 0 to 2 MPa (300 psig). It is used to indicate the output of the
Low Pressure Outlet Regulator (12).
3.
The High Pressure Outlet Gauge (4) is constructed of stainless steel and is 4. in (102
mm) in diameter with a range of 0 to 70 MPa (10 000 psig) or 0 to 103 MPa (15 000
psig). It is used to indicate the output of the High Pressure Outlet Regulator (7).
3.2
SETTING LOW PRESSURE OUTPUT
All previous sections (especially Section 2.3) should be read, understood and instructions completed
before continuing.
It is not necessary to open the Shop Drive Air Shut-off Valve (11) when using the low pressure circuit.
The gas booster pump is not used for generating these pressures.
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
the situation, set the initial pressure below the setpoint then adjust the regulator up to the
final setpoint.
3.2.1
INCREASING PRESSURE
n
Close the Low Pressure Outlet Regulator (12) by rotating the knob counter-clockwise
until no spring force is felt. The Low Pressure Outlet Regulator (12) does not have a stop
and therefore will result in the removal of the knob from the body if counter-clockwise
rotation is continued beyond the shut-off point.
o
Apply instrument gas to the supply inlet.
Ensure the supply does not exceed 20 MPa (3 000 psi). Pressures above this range may
result in a failure that could damage the instrument and/or cause personal injury.
p
Close or plug the low pressure outlet circuit to prevent gas flow (circuit is dead ended).
