Fluid handling – Line condition change responsive valves – Bi-directional flow valves
Patent
1996-12-19
1999-06-22
Ferensic, Denise L.
Fluid handling
Line condition change responsive valves
Bi-directional flow valves
13753325, 13753329, F16K 1726
Patent
active
059133309
ABSTRACT:
A non-sticking, field replaceable valve seat and pallet assembly for use in a pressure vacuum relief valve. The valve seat is adapted for positioning within a valve orifice inside the valve housing. The valve seat has three guide vanes spaced around and radiating inwardly from an inner wall of the valve seat, the guide vanes each having a tip. The pallet includes a pallet disc for sealingly engaging the valve seat and a cylindrical guide stem, a lower portion of which extends below the pallet disc for riding between the tips of the guide vanes. Both the valve seat and the lower portion of the guide stem are located "inside" the process where they are less apt to freeze. The distance between adjacent guide vane tips is less than the diameter of the guide stem; thus, the guide stem is prevented from moving out from between the guide vanes. The design minimizes the area of surface contact between the guide stem and the tips of the guide vanes, thus reducing potential sticking locations, allowing for smooth valve stroke during operation and reducing valve wear and flutter.
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Photograph of current systems described on p. 2 of Specifications.
Jones George Donald
Linden Glenn Scott
Enardo Manufacturing Company
Farid Ramyar
Ferensic Denise L.
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