Metallic seat assembly for valves

Details Metallic seat assembly for valves Metallic seat assembly for valves

1979-09-19

1981-10-06

Weakley, Harold W.

Valves and valve actuation

With means to increase head and seat contact pressure

Seat pressed to valve

251174, 251306, 251315, F16K 2500

Patent

active

042931169

ABSTRACT:
A valve seat assembly adapted to fit within an annular groove in a butterfly valve body. The seat assembly includes a pair of opposed metal seat rings generally L-shaped in cross section with overlapping outer legs seated and anchored in the bottom of the groove. The seat rings have flexible free inner end portions extending radially inwardly of the groove terminating at outwardly curled arcuate ends which contact the sealing surface of the valve disc and extend laterally of the groove in spaced relation to and over the adjacent valve body. A resilient soft seal is mounted between the metal seat rings and the sides of the metal seal rings are corrugated to grip and retain the soft seal in place. The end portions of each metal ring have a relatively long free length and are easily flexed laterally and radially outwardly of the valve body by contact with the outer periphery of the disc when the disc is moved to a closed position to maintain sealing contact with the disc without requiring a high operating torque.

REFERENCES:
patent: 2783106 (1957-02-01), Barnhart

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