Clapper seal for dry pipe valve

Details Clapper seal for dry pipe valve Clapper seal for dry pipe valve

1988-09-14

1989-08-08

Fox, John

Fluid handling

Line condition change responsive valves

Direct response valves

137527, 251316, F16K 1503

Patent

active

048543420

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.

REFERENCES:
patent: 3058487 (1962-10-01), Helling et al.
patent: 3295547 (1967-01-01), Scaramucci
patent: 4090529 (1978-05-01), Schuller et al.

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