Self-closing valve fitting

Details Self-closing valve fitting Self-closing valve fitting

1986-03-13

1987-06-30

Nilson, Robert G.

Valves and valve actuation

Fluid actuated or retarded

Compulsory cut-off after flow period

251 25, F16K 2104

Patent

active

046764771

ABSTRACT:
A self-closing valve fitting comprises a housing which bounds an internal space and includes a water inlet and a water outlet communicating with the internal space and a valve seat situated between the water inlet and the water outlet. A valve piston is received in the internal space for movement toward and away from the valve seat and for attendant cooperation with the valve seat. The valve piston delimits in the internal space, at a side thereof which faces away from the valve seat, a relief chamber. An actuation valve is arranged in the valve piston between the relief chamber and the water outlet and forms a part of an arrangement for self-retention of the fitting during a delayed opening movement of the valve piston. A deaeration member is arranged in the relief chamber and forms at a region of a jacket wall of the housing which circumferentially bounds the relief chamber at least one small flow-through passage which leads to the actuation valve. The deaeration member provides for a deaeration of the relief chamber even when the self-closing valve fitting is installed in a horizontal orientation.

REFERENCES:
patent: 2719538 (1955-10-01), Cole
patent: 2758811 (1956-08-01), Peterson
patent: 4577829 (1986-03-01), Strangfeld

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