Control system for helical screw compressor

Details Control system for helical screw compressor Control system for helical screw compressor

F - Mech Eng,Light,Heat,Weapons

04

D

230/34, 121/63

F04D 27/00 (2006.01)

Patent

CA 1052753

CONTROL SYSTEM FOR HELICAL SCREW COMPRESSOR ABSTRACT OF THE DISCLOSURE A helical screw air compressor unit has a rotary capacity control valve, a compressor inlet throttling valve, and a pressure relief valve for venting the compressor discharge conduit. A control circuit senses pressure in the compressed air supply system downstream of the compressor and operates the capacity control valve, inlet throttling valve, and pressure relief valve in a predetermined sequence to provide an improved power consump- tion characteristic for variable demand compressor applications. The control circuit includes a hydraulic control valve and an actuator for operating the rotary capacity control valve to regu- late compressor throughput to maintain a predetermined pressure without overpressuring the supply system during operation at conditions of reduced demand for compressed air.

298518

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