Quincy Compressor QGS 40, Instruction Book

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2.2 Air and oil circuit
Air circuit
Flow diagram, air circuit
Reference Description
A Intake air
B Air/oil mixture
C Oil
D Wet compressed air
Description
Air drawn through filter (AF) and open inlet valve (IV) into compressor element (E) is compressed. A mix
of compressed air and oil flows into the air receiver/oil separator (AR) via check valve (CV). The air is
discharged through outlet valve (AV) via minimum pressure valve (Vp) and air cooler (Ca).
During loaded operation, minimum pressure valve (Vp) keeps the pressure in the separator tank (AR) above
a minimum value, required for lubrication. An integrated check valve prevents the compressed air downstream
the valve from being vented to atmosphere during unloaded operation. When the compressor is stopped, check
valve (CV) and inlet valve (IV) close, preventing compressed air (and oil) to be vented into the air filter.
Instruction book
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