Low leakage orifice-controlled poppet valve

Details Low leakage orifice-controlled poppet valve Low leakage orifice-controlled poppet valve

1986-04-14

1987-07-14

Nilson, Robert G.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 3004, 251282, F16K 31122

Patent

active

046797653

ABSTRACT:
An orifice controlled poppet valve includes a pilot poppet pressure balancing arrangement which prevents fluid leakage between the valve inlet and outlet. The pressure balancing arrangement includes a pin slidable in a passage in the main valve member, which passage extends between the inlet and a pilot outlet passage. One end of the pin engages a stem which projects from from the pilot poppet. The other end of the pin engages a flexible diaphragm which forms a seal between the valve inlet and the passage which receives the pin. An inlet pilot passage includes an annular clearance upstream of an orifice. The radial dimension of the annular clearance is smaller than the diameter of the orifice.

REFERENCES:
patent: 2694544 (1954-11-01), Hall
patent: 3033228 (1962-05-01), Mohler
patent: 3114532 (1963-12-01), Gray et al.
patent: 3893471 (1975-07-01), Byers, Jr.
patent: 4174824 (1979-11-01), Kolze
patent: 4201362 (1980-05-01), Nishimi et al.
patent: 4494726 (1985-01-01), Kumar et al.

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