
Instruction book
102
2920 7101 22
10.1.2 Operation
Description
The compressor oil flow is controlled by two thermostatic valves (BV1 and BV2), ensuring reliable
compressor operation and optimum energy recovery.
Bypass valve (BV1) is integrated in the oil filter housing of the compressor and controls the oil flow
through the main oil cooler (Co) of the compressor. Bypass valve (BV2) controls the oil flow through the
oil/water heat exchanger (HE) of the ER unit. Both valves consist of an insert (thermostat) mounted in a
housing.
Flow diagram of compressor with energy recovery system
Reference
Designation
Reference
Designation
BV2
Thermostatic bypass valve of ER
unit
OF Oil
filter
HE
Oil/water heat exchanger (ER
unit)
AR
Oil separator vessel
E
Compressor element
BV1
Thermostatic bypass valve in oil
filter housing
Co Oil
cooler
(compressor)
Ca Aftercooler
(compressor)
1
Water inlet
2
Water outlet
BV2 starts closing the bypass line over the heat exchanger (HE) at the lower limit of its temperature range.
At the upper limit of its temperature range, the bypass line is completely closed and all the oil flows
through the ER heat exchanger.
Содержание QGS 40
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