Pilot operated check valve

Details Pilot operated check valve Pilot operated check valve

1979-05-21

1981-08-11

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137496, 13751629, 137522, 137538, 13754323, 251DIG1, F16K 1506

Patent

active

042828961

ABSTRACT:
A pilot operated check valve for high pressure service utilizing an O-ring is disclosed, wherein a poppet valve having a seating surface for engagement with a valve seat is provided on its front side with a spool member formed integrally therewith and projecting axially therefrom, an O-ring mounting groove is provided on the spool member in abutment relation with the seating surface of the poppet valve opposed to the valve seat so that the O-ring mounted in the groove may be positioned in a fluid passageway extending through a partition wall between primary-side and secondary-side fluid compartments. The spool member has a passage for fluid flow formed on it which extends from its front end facing the primary-side fluid compartment to the surface of the spool member adjacent the O-ring mounting groove.

REFERENCES:
patent: 2960998 (1960-11-01), Sinker
patent: 3053501 (1962-09-01), Varga
patent: 3072143 (1963-01-01), Fleischhacker

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