COMPRESSOR CAPACITY CONTROL - TURN
VALVE UNITS ONLY
The capacity of the compressor is controlled by the ac-
tion of the Turn Valve and the Compressor Inlet Valve.
The turn valve controls compressor delivery to match
demands of 40% to 100% of the compressor’s maxi-
mum capacity. The inlet valve throttles to control com-
pressor delivery to match demands of O% to 40% of the
compressors maximum capacity.
Example with normal setting of 100 PSIG:
Compressor
Delivery
Full Capacity
70% Capacity
40% Capacity
30% Capacity
20% Capacity
0% Capacity
Inlet Valve I Turn Valve
Open
Open
Open
Closing
Closing
Closed
Closed
50% Open
Full Open
Full Open
Full Open
Full Open
Discharge
Manifold
Pressure
100
100
100
103
103
103
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