Patent ID: 6050292
Filing Date: 2000-04-18
Classification: F16K,G05D,Y10T

Abstract:
An absolute pressure regulator valve assembly for controlling the absolute pressure (P.sub.C) of a fluid source, comprising:a) a hollow housing comprising an inlet port and a discharge port, said inlet port being in fluid communication with a fluid source, said discharge port being associated with a valve seat;b) a bellows assembly positioned within said housing, said bellows assembly having an open first end and a closed second end, said first end being gas-tight sealed to said housing and being solely in fluid communication with a means for providing a reference pressure (P.sub.R) within said bellows assembly;c) a valve closure element attached to said closed end of said bellows assembly, said valve closure element being positioned relative to said valve seat wherein motion of said bellows assembly provides opening and closure of said discharge port; and,d) a force biasing assembly attached to said housing for imposing a force on said closed end to provide a desired adjustment of the pressure at said inlet port;wherein during operation, when a net force on said closed end in the direction of said valve seat is greater than a net force in an opposite direction caused by a decrease of pressure at the inlet port, the valve closure element moves in a direction toward the valve seat.