Main steam isolation check valve

Details Main steam isolation check valve Main steam isolation check valve

1974-12-02

1976-08-03

Rosenthal, Arnold

Valves and valve actuation

Lost motion between actuator and valve

Check valve with external opening and closing means

251 83, 251298, 1375274, F16K 1518

Patent

active

039725049

ABSTRACT:
A valve arrangement having a disc which is tapered in cross section from the center to the periphery so that upon impact closure with the seat, deformation of the disc will absorb impact energy. The valve arrangement can consist of two check valves in back-to-back relation, the valve discs being swingable relative to the seats therefor, one of the valves being held in an open position and released upon abnormal conditions so that it can close.

REFERENCES:
patent: 152844 (1874-07-01), Johnston
patent: 2312290 (1943-02-01), Smith et al.
patent: 2496898 (1950-02-01), Thompson et al.
patent: 2504006 (1950-04-01), Davis
patent: 2717001 (1955-09-01), Perrault
patent: 3062232 (1962-11-01), McGay
patent: 3106220 (1963-10-01), Hose
patent: 3334858 (1967-08-01), Hay
patent: 3364944 (1968-01-01), McGay
patent: 3883111 (1975-05-01), Jourdan

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