Atlas Copco GA 37+ Instruction Book page 89

Instruction book
Re fe re nce De s ignation
BV2 Thermostatic bypass valve of ER unit OF
HE Oil/water heat exchanger (ER unit)
E Compressor element
Co Oil cooler (compressor)
1 Water inlet
BV2 starts closing the bypass line and opening the oil supply line from the ER 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.
On compressors versions with a maximum pressure lower than 13 bar, BV2 starts opening at 40 °C and is
completely open at 55 °C .
On compressors with a maximum pressure of 13 bar , BV2 starts opening at 60 °C and is completely open at 75
°C.
The housing of BV2 is provided with a special handle (V1), allowing to control the working of the energy
recovery system.
As can be seen on the ER label, the ER unit is integrated in the oil circuit and will recover energy when the
handle is completely turned in clockwise.
When the handle is turned out anticlockwise, the heat exchanger (HE) is bypassed and no energy will be
recovered.
9096 3321 00
Re fe re nce
AR
BV1
Ca
2
Detail of valve housing of BV2 with handle V1
De s ignation
Oil filter
Oil separator vessel
Thermostatic bypass valve in oil
filter housing
Aftercooler (compressor)
Water outlet
89