Patent ID: 6752169
Filing Date: 2004-06-22
Classification: F16K,G05D,Y10T

Abstract:
A regulator valve for use in a pipeline to control the pressure of fluid flowing in the pipeline and to selectively stop the flow of said fluid, the regulator valve comprising:a valve housing having an inlet passage and an outlet passage separated by a partition with a flow passage formed in the partition, the flow passage defining an upstream side and a downstream side of the pipeline; a seat surrounding the flow passage; a valve member movable toward and away from fluid sealing contact with the seat; a control housing located adjacent the valve housing; a rod connected at one end to the valve member and having an opposite end extending into the control housing; a rod partition connected to the opposite end of the rod, at least a portion of the rod partition adjacent the valve rod being movable with the valve rod toward and away from the seat, the rod partition being in fluid sealing relation with the control housing; a spring biasing the rod partition and the valve member in a direction away from sealing engagement with the seat; an auxiliary partition positioned in the control housing on the side of the rod partition away from the seat, the auxiliary partition being in fluid sealing relation with the control housing; a spacer located between the rod partition and the auxiliary partition to maintain a minimum spacing between the rod partition and the auxiliary partition; a first port formed in the control housing and located between the rod partition and the auxiliary partition; a second port formed in the control housing and located on the side of the auxiliary partition opposite from the rod partition; a first conduit connecting the upstream side of the pipeline to the one of the first and second ports to introduce fluid under pressure from the upstream side into the control housing to act against one or both of the auxiliary partition and the rod partition; a second conduit connecting the downstream side of the pipeline to the other of the first and second ports to introduce fluid under pressure from the downstream side into the control housing to act against one or both of the auxiliary partition and rod partition; and means to control the flow of fluid provided in an least one of the conduits.