Excess pressure shutoff valve

Details Excess pressure shutoff valve Excess pressure shutoff valve

1978-04-26

1980-12-23

Weakley, Harold W.

Fluid handling

With repair, tapping, assembly, or disassembly means

Assembling, disassembling, or removing cartridge type valve

137327, 137461, F16K 4300

Patent

active

042404584

ABSTRACT:
A valve adapted to be connected in a fluid line for shutting off flow in response to fluid pressure in excess of a predetermined pressure. The valve includes a housing provided with inlet and outlet ports separated by a valve seat. A pressure chamber in the housing is defined by a diaphragm subjected to the pressure of fluid flowing through the housing. The diaphragm is a unitary, homogenous, fluid impervious snap disc movable between two over center stable positions. A valve member cooperating with the valve seat is connected to the diaphragm by a stem, and the valve is open in one diaphragm position and closed in the other diaphragm position. A spring biases the valve member toward the closed position and is adjusted to preload the diaphragm so that when fluid pressure exceeds a predetermined value the diaphragm moves from the valve open to the valve closed position. A reset member is carried by the diaphragm and permits manual reopening of the valve.

REFERENCES:
patent: 2070661 (1937-02-01), Hughes
patent: 2712427 (1955-07-01), Welborn
patent: 2785698 (1957-03-01), Vance
patent: 3731707 (1973-05-01), Berle
patent: 3892258 (1975-07-01), Hendrick
patent: 3920033 (1975-11-01), Ferrando
patent: 4026314 (1977-05-01), Turner

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