GBK-50M GBK-110M
Instructions
14
Booster Runs Too Slowly
A slow-running booster can be confused with the problem described in
Pressure Generates Too Slowly or Not At All
.
A slow running booster means that the pump itself is running slowly which also causes the pressure to be generated
slowly.
Check that booster drive shutoff valve (
D
) is fully open. If not, open valve fully.
Check that the booster drive adjust regulator (
) is set to a pressure of 0.15 MPa (20 psig) or higher and that
minimum flow requirements are met (see
Specifications
and
Site Requirements
). If the drive pressure gauge
drops while the booster is cycling, this indicates inadequate drive air supply.
Check there are no restrictions in the shop drive air supply circuit. Remove any restrictions. If an external filter is
installed on the shop drive air circuit, it may cause a flow restriction.
Check that there are no leaks in the shop drive air circuit. Repair any leaks.
Pressure Generates Too Slowly Or Not At All
A slow running booster will cause the pressure to be generated slowly. Ensure the booster is running properly before
you continue (see
Booster will not Run
).
Check that the test gas (high pressure) supply to the SUPPLY port is not below the minimum recommended
pressure. If the supply is too low, increase supply pressure. Speed of pressure generation is directly related to
the pressure of the test gas supply. For example, pressure is generated twice as quickly with the test gas supply
at 14 MPa (2 000 psi) than with the supply at 7 MPa (1 000 psi).
Check that there are no restrictions in the test gas supply line to the booster. If a restriction exists, remove it.
Possible restrictions include a valve not fully opened, a regulator with a low flow constant (CV), an inline filter, or
small diameter tubing.
Check that the booster inlet and outlet check valves in the high pressure booster piston are operating properly.
Close the booster drive shutoff valve (
D
). Adjust the high-pressure regulator (
F
) to zero pressure by rotating
the knob counter-clockwise until no spring force is felt.
Open the booster drive shutoff valve (
D
). The booster should cycle several times then stall. If the booster does
not stall when the test gas supply pressure is above 2 MPa (300 psi) and the shop drive air pressure is below
0.25 MPa (40 psi), the check valves are the most likely cause. Contact a Fluke Calibration Authorized Service
Center if faulty check valves are suspected.
Booster Runs Continuously
The booster is a pneumatically operated pump. The reciprocating action is caused by an imbalance of
forces within the pump due to the opposing drive air pressure and the high pressure instrument gas
supply that is being boosted. If the booster runs continuously, it means that forces do not equalize.
Check that the test gas supply is present at the SUPPLY port (
E
) and is at least 1/25 of the desired booster
output pressure. Generally, test gas supply needs to be at least 7 MPa (1 000 psi). If not, ensure that supply
meets required specifications (see
High-Pressure Gas Supply
).
Check that the high-pressure circuit connected to the HIGH PRESSURE OUT port is not open to atmosphere.
Check that there are no leaks in the high-pressure line from the output of the booster at the check valve to the
point-of-use. Repair any leaks. If driver air supply pressure is above 0.25 MPa (40 psi), adjust to below this limit.
If booster stops running, increase test gas supply.
Check that the inlet and outlet check valves in the high pressure booster piston are operating properly. Close the
booster drive shutoff valve (
D
). Adjust the high pressure regulator (
F
) to zero pressure by rotating the knob
counter-clockwise until no spring force is felt.
Open the booster drive shutoff valve (
D
). The booster should cycle several times then stall. If the booster does
not stall when the test gas supply pressure is above 20 MPa (300 psi) and the drive air pressure is below
0.25 MPa (40 psi), the check valves are the most likely cause (indicated by a leak from the top of the high-
pressure head), followed by high-pressure seal failure (indicated by a leak from the exhaust filter). Contact a
Fluke Calibration Authorized Service Center if faulty check valves or high-pressure seal are suspected.
Summary of Contents for GBK-110M
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