GB-K Gas Booster Package Operation and Maintenance Manual
© 1998 - 2000
DH Instruments, Inc
.
Page 26
•
Check that no leaks exist in the pressure circuit from the instrument gas supply to the
point-of-use. Repair any leaks.
5.6.2
HIGH PRESSURE
•
Check that the instrument gas supply is set above 2 MPa (300 psi) (the minimum value).
In some cases, the minimum pressure supply is 4 MPa (600 psi). When in doubt,
increase instrument gas supply to 4 MPa (600 psi).
•
Check that shop drive air is set at the correct value (depending on model) and that it is
supplied to the booster. See Section 3.4.1.
•
Check that no leaks exist in the pressure circuit from the instrument gas supply to the
point-of-use. Repair any leaks.
5.7
LEAKS
Pressure leaks are the most common problem found in pressure handling equipment. Normally the
first step is to determine if the leak is within the GB-K or outside of the unit.
To determine if the leak is within the unit, you must disconnect it at the OUTLET port and plug it.
Establish similar conditions under which the leak was observed and determine if the leak is
still present. For small leaks, it may be necessary to install an appropriate pressure sensing device
at the OUTLET port. In some cases, it is useful to perform simple leak checks on the most common
outside sources before disconnecting the test system. Note that leaks inside the GB-K are unusual
unless there has been some disassembly.
Because of the close fitting components and short tubing runs, some users may find it beneficial to
return the GB-K to a
DHI
Authorized Service Provider for repair rather than performing the
troubleshooting and repair themselves (see Section 6).
More than one leak can exist in a system. Fixing one leak does not guarantee a leak tight system.
Therefore, continue executing the troubleshooting procedures until all leaks are located and
corrected. Since it is impractical to produce a troubleshooting guide that will cover every conceivable
leak, the source of your leak may not be covered in this guide.
The following procedures may require you to tighten a leaking fitting. There are two precautions that
need to be observed when doing this:
•
Never tighten a fitting while it is under pressure. If pressure is in the system and the fitting should
fail while tightening it, you or those around you may be injured.
•
Do not over-torque the compression-type fittings that are inside the GB-K. To do so will damage
them requiring their replacement.
Check all fittings and components for leaks. Use leak detection fluid for small leaks. Tighten loose
fittings or replace damaged fittings. Repair or replace leaking regulators.
It is possible that a leak exists in the high pressure section of the gas booster. These leaks are very
difficult to isolate and detect. If no leaks can be found following the above procedures, it is likely the
problem is within the booster. Please contact a
DHI
Authorized Service Provider for assistance (see
Section 6).
