Check valve assembly

Details Check valve assembly Check valve assembly

1979-02-09

1981-01-13

Michalsky, Gerald A.

Fluid handling

Line condition change responsive valves

Line flow effect assisted

137540, F16K 1502

Patent

active

042443954

ABSTRACT:
A check valve assembly employs a poppet slidably mounted in a stationary barrel to engage a seat in the barrel. The poppet and barrel cooperate to form a closed chamber containing a spring which acts to close the poppet against the seat, but the force of the spring is partially overcome by a reduction in pressure in the chamber caused by venturi action by forward flow through the check valve assembly with the result that higher upstream pressure is needed to open the valve than to maintain it in open position, at least for low and medium flow rates. Two identical check valve assemblies are connected in series, the assemblies being perpendicular to each other, each mounted at about a 45.degree. angle with respect to coaxial inlet and outlet terminals.

REFERENCES:
patent: 1322938 (1919-11-01), Parker
patent: 3027913 (1962-04-01), Chatham et al.
patent: 3438391 (1969-04-01), Yocum

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