Fluid handling – Destructible or deformable element controlled – Heat destructible or fusible
Patent
1978-05-30
1980-09-02
Cline, William R.
Fluid handling
Destructible or deformable element controlled
Heat destructible or fusible
251173, 251174, 251306, F16K 1226
Patent
active
042201721
ABSTRACT:
Disclosed is a butterfly valve comprising sealing means for a movable valve member in the form of a resilient high temperature destructible sealing ring and a resilient high temperature indestructible seating ring, both of which are normally preloaded into radial sealing engagement with the movable valve member. The high temperature destructible seating ring is the primary seal and the high temperature indestructible seating ring being a backup seal in one direction of flow and the high temperature indestructible seating ring is the primary seal in the opposite direction of flow. Upon destruction of the high temperature destructible seating ring, the high temperature indestructible seating ring is so retained and configured to provide bidirectional seating.
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DuPont Bulletin T-13, 3/1970, "Properties, Processing and Applications of Teflon Fiber".
Cline William R.
Litton Industrial Products Inc.
Ribando Brian L.
Spiegel H. Jay
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