Proportional valve
Abstract
Abstract A PROPORTIONAL VARIABLE FLOW CONTROL VALVE INCLUDING A PISTON TYPE MAIN VALVE MEMBER HAVING A PILOT VALVE SLIDABLE AXIALLY THEREIN THAT CONTROLS THE PRESSURE DROP ACROSS THE MAIN VALVE AND HENCE THE OPENING OF THE MAIN VALVE. THE PISTON TYPE MAIN VALVE FORMS A CHAMBER IN THE MAIN VALVE HOUSING THAT IS CONTINUOUSLY PRESSURIZED BY INLET FLUID THEREBY TENDING TO CLOSE THE VALVE, AND THE BALL VALVE IS POSITIONED TO RELIEVE PRESSURE IN THIS CHAMBER TO PERMIT OPENING OF THE VALVE UNDER A CONSTANT INLET FLUID BIASING FORCE ACTING ON THE VALVE. AN ACTUATOR IS PROVIDED FOR THE BALL PILOT VALVE THAT SHIFTS THE BALL VALVE IN AN AMOUNT PROPORTIONAL TO THE DESIRED FLOW RATE THROUGH THE MAIN VALVE AND IN RESPONSE TO THE DIFFERENTIAL PRESSURES THE MAIN VALVE OPENS A CORRESPONDING AMOUNT.
Inventors
- 👤 Sherwin D Katz
- 👤 Joseph M Levon
Bibliographic Details
Claims Analysis
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