Safety trip valve for steam or gas turbines with means to assure

Details Safety trip valve for steam or gas turbines with means to assure Safety trip valve for steam or gas turbines with means to assure

1975-06-19

1976-10-26

Rosenthal, Arnold

Fluid handling

Systems

Sequentially progressive opening or closing of plural valves

251 25, F16K 31143

Patent

active

039878180

ABSTRACT:
A safety trip valve for interrupting the flow of working fluid to fluid operated machinery is actuated to closed position by unbalanced forces produced thereon by the pressure of the working fluid on occurrence of adverse operating conditions. After closure of the trip valve, pressure force unbalance is maintained by a pressure responsive transfer valve assembly in the trip valve which prevents sudden automatic opening of the trip valve when the adverse operation condition is corrected. A mechanical positioner in operative association with the transfer valve allows the working fluid to produce a net force in the opening direction, which causes the trip valve to follow the mechanical positioner as it is moved by the operator from closed to open position.

REFERENCES:
patent: 338771 (1886-03-01), Page
patent: 2016460 (1935-10-01), Sorensen
patent: 2307628 (1943-01-01), Ludeman
patent: 2734712 (1956-02-01), Fraser
patent: 3712578 (1973-01-01), Dawson

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