Relief valve

Details Relief valve Relief valve

1978-11-22

1980-08-05

Cline, William R.

Fluid handling

Line condition change responsive valves

Direct response valves

251337, F16K 1502

Patent

active

042157188

ABSTRACT:
A novel relief valve is provided for connection with a fluid system. The relief valve includes an elongated housing having an inlet and an outlet with a fluid passage connecting the inlet to the outlet. Preferably, the housing is constructed of a number of conventional and readily available pipe fittings. A relief valve assembly is disposed within the fluid passageway and comprises a perforated tube with a valve seat positioned at one axial end of the tube and adjacent the housing inlet. A valve member is also disposed within the perforated tube and is urged against the valve seat by a helical spring to normally prevent fluid flow through the relief valve. A stop pin is disposed through substantially diametrically opposed apertures in the perforated tube at a position spaced from the valve seat which acts as a stop for the end of the helical spring opposite from the valve member. The axial length, and thus the compression, of the spring can be varied by changing the axial position of the stop pin which accordingly varies the fluid pressure at the housing inlet necessary to open the valve assembly and to permit fluid flow through the relief valve.

REFERENCES:
patent: 1926800 (1933-09-01), Casper
patent: 3189046 (1965-06-01), Callahan et al.
patent: 3473626 (1969-10-01), Tadahide et al.
patent: 3503418 (1970-03-01), Petrucci et al.
patent: 3626977 (1971-12-01), Riley et al.
patent: 4009017 (1977-09-01), Jones

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