Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1996-03-12
1998-03-03
Ferensic, Denise L.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
13750513, 137244, 251 50, F16K 3112
Patent
active
057224544
ABSTRACT:
A fluid flow device has a body which includes an inlet and an outlet with a valve seat therebetween. A valve stem having a valve member thereon is mounted in the body, and the valve member is operably connected to a diaphragm which separates a region within the body into a pair of separate pressure chambers. A fluid passage is formed in the body communicating one pressure chamber with upstream pressure in the inlet, while the other pressure chamber communicates with downstream pressure in the outlet. A pressure differential between the chambers will normally hold the valve member in an open position against the action of a biasing means, until the pressure differential reaches a predetermined amount, whereby the valve member is slowly closed until fluid flow through the device is stopped. The valve seat and valve member do not form a perfectly tight seal so as to allow some leakage thereby allowing restricted fluid flow into the downstream side of the device and any system connected thereto, to prevent the system from being emptied.
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Smith Robert P.
Stedman Hubert Q.
Farid Ramyar
Ferensic Denise L.
O'Neill James G.
Q-Fuse LLC
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