초록 ▼

Pressure regulating valves intended primarily for use as pressure regulating shut-off valves are disclosed. The valves utilize a simple piston assembly operative between a valve open position and a valve closed position responsive to a spring biasing the assembly toward the open position against an

Pressure regulating valves intended primarily for use as pressure regulating shut-off valves are disclosed. The valves utilize a simple piston assembly operative between a valve open position and a valve closed position responsive to a spring biasing the assembly toward the open position against an opposite force proportional to the outlet pressure. The piston assembly has only a single seal to seal the assembly against leakage, with a shut-off mechanism operative on only a 180 degree rotation thereof being cooperatively disposed with respect to the piston assembly so as to not require any additional seals. Embodiments having a fixed pressure regulation and a manually adjustable pressure regulation are disclosed.

대표청구항 ▼

A pressure regulating valve for receiving fluid from a fluid source and controllably delivering fluid at a regulated pressure comprising first and second housing members, each having first and second ends, said first housing member having an inlet port at said first end thereof, said second housing

A pressure regulating valve for receiving fluid from a fluid source and controllably delivering fluid at a regulated pressure comprising first and second housing members, each having first and second ends, said first housing member having an inlet port at said first end thereof, said second housing member having an outlet port at said first end thereof and a valve seat having a valve seat opening therethrough adjacent said second end and facing said first end thereof, said first and second housing members being joined adjacent said second ends thereof so that said inlet port, said outlet port and said valve seat are all coaxial, said first housing member having a spring housing integral therewith and supported internally to said first housing member on at least one support so as to allow fluid flow therebetween, said spring housing being closed adjacent the inlet port end thereof, a compression spring within said spring housing, a valve closure assembly fitting at least in part within said spring housing and extending through said valve seat opening, said valve closure assembly having a valve closure member facing said valve seat, said valve closure assembly being moveable along the axis of said valve seatbetween a closed position with said valve closure member engaging said valve seat and an open position with said valve closure member displaced from said valve seat and toward said second port, said compression spring urging said valve closure assembly to said open position, a diaphragm sealingly fastened adjacent its outer periphery to said spring housing and sealingly fastened adjacent its inner periphery to said valve closure assembly, thereby sealing said spring housing and isolating said spring from fluid in said inlet and outlet ports, and cam means extending radially through said first housing means, said at least one spring housing support and said spring housing, said cam means being a manually operable means for engaging said valve closure assembly and forcing said assembly to said closed position.