Gardner Denver AUTO SENTRY EAU99P Operating And Service Manual page 34

COMPRESSOR CAPACITY CONTROL
The capacity of the compressor is controlled by the action 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
maximum capacity. The inlet valve throttles to control compressor delivery to match demands of 0% 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 Position Turn Valve Position
Open
Open
Open
Closing
Closing
Closed
13-10-615
Closed
50% Open
Full Open
Full Open
Full Open
Full Open
Page 33
Discharge Manifold
Pressure
(psi)
100
100
100
103
103
103