DH Instruments GB-K-152, Руководство по эксплуатации и обслуживанию

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GB-K Gas Booster Package Operation and Maintenance Manual
© 1998 - 2000 DH Instruments, Inc .
Page 24
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Check that gas is not continuously venting from the exhaust muffler. If gas is venting through the
muffler, see Section 5.8.
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Check that the booster is not in a stall state. If booster is stalled, determine reason and remedy.
A stall state will occur when the pressure in the high pressure section of the booster is equal to
the pressure in the low pressure section times the ratio (75:1 or 152:1). A stall can only occur if
the high pressure circuit is plugged. See Section 3.1.1 and Figure 3 for additional information on
the gas booster.
If the above suggestions do not result in proper operation of the booster, contact a DHI Authorized
Service Provider (see Section 6).
5.3 BOOSTER RUNS TOO SLOWLY
A slow running booster can be confused with Section 5.4. A slow running booster means that the
pump itself is running slowly which also causes the pressure to be generated slowly.
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Check that Shop Drive Air Shut-off Valve (11) is fully open. If not, open valve fully.
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Check that the Shop Drive Air Regulator (10) is set to a pressure of 0.15 MPa (20 psig) or higher
and that minimum flow requirements are met (see Section 2.2).
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Check there are no restrictions in the shop drive air supply circuit. Remove any
existing restrictions. If a filter is installed on the shop drive air circuit, it may cause a
flow restriction.
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Check that there are no leaks in the shop drive air circuit. Repair any existing leaks.
If the above suggestions do not result in the proper operation of the booster, contact a DHI
Authorized Service Provider (see Section 6).
5.4 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 continuing; see Section 5.3.
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Check that the instrument gas (high pressure) supply is not below 2 MPa (300 psi). If the supply
is too low, increase supply pressure. Speed of pressure generation is directly related to the
pressure of the supply instrument gas. For example, pressure will be generated twice as fast
with the instrument gas supply is at 14 MPa (2 000 psi) than with the supply at 7 MPa (1 000 psi).
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Check that there are no restrictions in the instrument gas supply line to the booster. If a
restriction exists, remove it. Restriction may be a valve not fully opened, a regulator with a low
flow constant (CV), an inline filter, small diameter tubing, etc.