Valve system with adjustable seating force

Details Valve system with adjustable seating force Valve system with adjustable seating force

1987-05-14

1989-08-01

Rosenthal, Arnold

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251175, 251 31, F16K 31122

Patent

active

048528501

ABSTRACT:
A steam bypass valve system for a steam turbine. The system provides a supplemental hydraulic seating force to a fast acting bypass valve after the valve plug is positioned against the valve seat with a spring force. The system also provides for quick hydraulic relief in order to retain the fast opening characteristics of a single acting hydraulic valve.

REFERENCES:
patent: 1721324 (1929-07-01), Wilson
patent: 2707378 (1955-05-01), Ryan
patent: 3656707 (1972-04-01), Marotta
patent: 3684236 (1972-08-01), Lewis
patent: 3814375 (1974-06-01), Grotloh
patent: 3858844 (1975-01-01), Lewis et al.
patent: 3892382 (1975-07-01), Dresner
patent: 4019712 (1977-04-01), Martin
patent: 4070000 (1978-01-01), Prescott
patent: 4552330 (1985-11-01), Grothloh
patent: 4589627 (1986-05-01), Grotloh

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