Cooling System - Atlas Copco GA 37 VSD Instruction Book

The oil system is provided with a thermostatic bypass valve (BV). When the oil temperature is
below 40 ˚C (104 ˚F), the bypass valve shuts off the oil supply from oil cooler (Co). Air pressure
forces the oil from air receiver (AR) through oil filter (OF) and oil stop valve (Vs) to compressor
element (E). Oil cooler (Co) is bypassed. When the oil temperature has increased to 40 ˚C (104
˚F), bypass valve (BV) starts opening the supply from oil cooler (Co). At approx. 55 ˚C (131 ˚F),
all the oil flows through the oil cooler.
2.4

Cooling system

Air-cooled compressors
References
A
B
C
D
E
Description
The cooling system on air-cooled compressors comprises air cooler (Ca) and oil cooler (Co).
The cooling air flow is generated by fan (FN). This cooling fan is switched on and off depending
on the operating conditions according a specific algorithm.
16
Description
Intake air
Air/oil mixture
Oil
Wet compressed air
Condensate
Instruction book
API480496