Clapper seal for dry pipe valve
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United States of America Patent
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-
Aug 8, 1989
Grant Date -
N/A
app pub date -
Sep 14, 1988
filing date -
Sep 14, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A clapper seal for a dry pipe valve wherein a disc-shaped, resilient, compressible sealing gasket is secured to the clapper valve body by an annular, metallic washer. The washer is disposed between inner and outer sealing rings or beads formed on the underside of the gasket. The sealing rings are generally circular and cross-section, thereby minimizing surface contact with the air and water ring seats. The axial thickness and radial dimension of the washer are such that the washer contacts the air and water rings creating a metal-to-metal seal, and preventing further deformation of the sealing rings, upon over-compression or long-term compressive set of the gasket.
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