Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1980-06-06
1981-06-23
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
137503, 1375147, 13753331, F16K 1506
Patent
active
042744342
ABSTRACT:
An automatic check valve, particularly adapted for use in installations where it is desired to have the valve close automatically when a rupture occurs on the supply side of a high-pressure pipe system. The valve element for the check valve, which is adapted to move toward or away from an annular valve seat formed in a valve body between inlet and outlet ports, has a cone portion, preferably a truncated cone portion, which extends through the opening formed by the valve seat in the valve cody. This truncated cone portion, which reduces the cross-sectional area presented to fluid flow through the valve as it closes upon the occurrence of a rupture, results in a damping action which prevents shocks to the piping system as the valve closes upon the occurrence of a rupture. An additional damping piston is connected to the valve element to assist in the damping action as the valve closes. The valve automatically closes in the absence of fluid flow therethrough without the use of springs or the like and will readily open with only a slight pressure differential between its inlet and outlet ports.
REFERENCES:
patent: 558034 (1896-04-01), Brown
patent: 931532 (1909-08-01), Wainwright
patent: 965052 (1910-07-01), Wainwright
patent: 1029600 (1912-06-01), Foster
patent: 1322938 (1919-11-01), Parker
patent: 1684987 (1928-09-01), Hazard
patent: 2568026 (1951-09-01), Pigott
patent: 3219056 (1965-11-01), Dyson
patent: 3598145 (1971-08-01), Wolfson
Murray Thomas H.
Nilson Robert G.
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