Valve body with a housing having a cylindrical flow passage

Details Valve body with a housing having a cylindrical flow passage Valve body with a housing having a cylindrical flow passage

1988-09-16

1990-01-09

Fox, John

Valves and valve actuation

With means to increase head and seat contact pressure

Seat pressed to valve

251175, 251190, G16K 2500

Patent

active

048922870

ABSTRACT:
A valve piston (1) is axially movably arranged in a valve housing (8) having a cylindrical flow passage. A circumferential groove (2) of the piston (1) carries a sealing ring (3) for separating a high pressure side (H) from a low pressure side (L) of the valve. The sealing ring (3) has a cross-sectionally trapezoid shaped portion (4) of which the narrow side (3a) may be pressed tightly to seal against the inner valve seat surface (8') of the housing (8). At least one spring ring (7) is arranged to radially outwardly bias the sealing ring (3) for sealing against the valve seat surface (8').

REFERENCES:
patent: 3497177 (1970-02-01), Hulsey
patent: 3504884 (1970-04-01), Mokveld
patent: 3612483 (1971-10-01), Pool
patent: 4508315 (1985-04-01), Livorsi et al.

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