GB-H-152 GAS BOOSTER PACKAGE OPERATION AND MAINTENANCE MANUAL
© 2008 DH Instruments, a Fluke Company
Page 12
n
Adjust the pressure down using the high pressure adjust regulator by rotating the knob
counter-clockwise until a pressure below the setpoint is achieved as indicated on the
high pressure gauge.
o
Set the pressure to the final setpoint by rotating the knob clockwise until the desired
pressure is indicated on the high pressure gauge.
3.3
SETTING HIGH PRESSURE OUTPUT GREATER THAN
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 booster
drive shutoff valve. This stops generation of gas pressure by the pump but DOES NOT NECESSARILY reduce
pressure at the HIGH PRESSURE OUT port.
3.3.1
SETTING BOOSTER DRIVE PRESSURE
n
Close the booster drive air shutoff valve.
o
Close the high pressure adjust regulator by rotating the knob counter-clockwise until no
spring force is felt.
p
Calculate the required drive air pressure needed to generate the desired high pressure
(drive air powers the booster pump.) To calculate the appropriate regulator setting:
divide the booster ratio of 152 into the desired maximum output pressure. For example,
for a maximum output pressure of 80 MPa (12 000 psi), divide 152 into 80. This yields
0.53 MPa (77 psig) which is the pressure that the booster drive adjust regulator should
be set to.
It is usually desirable to have the high pressure generated by the booster be
significantly higher than the desired high pressure output of the GB-H-152. The benefits are
storing high pressure gas to assure a constant high pressure output when needed and
minimizing output fluctuation in the regulator. The disadvantage is that an overpressure
condition could occur at the output if the operator improperly sets the high pressure adjust
regulator.
q
Adjust the booster drive regulator by rotating the knob clockwise until the desired
pressure is indicated on the booster drive gauge.
Maximum drive pressure should not exceed 0.7 MPa (100 psig) in the GB-H-152-70M
and 0.9 MPa (130 psig) in the GB-H-152-100M. Pressure in excess of this range may result in
an overpressure condition on the inlet side of the high pressure adjust regulator.
r
Open the booster drive shut-off valve. The booster will begin operating when the valve is
opened. Exhausting gas noise may startle the operator. Be prepared for this operation.
