Rotary gate valve gasket and process for its manufacture

Details Rotary gate valve gasket and process for its manufacture Rotary gate valve gasket and process for its manufacture

1985-06-24

1987-01-27

Schwadron, Martin P.

Valves and valve actuation

With means to increase head and seat contact pressure

Seat pressed to valve

251306, F16K 2500

Patent

active

046389768

ABSTRACT:
A gasket for a rotary gate valve is made from a material that can be utilized only after sintering, such as a fluorocarbon polymer, and comprises a ring-shaped solid portion 15 surrounded by a coaxial, annular flange 16 for anchoring the gasket within the valve body. A closed chamber 23 is provided in the solid portion of the gasket and houses an elastic ring 28. In manufacturing the gasket an annular ring is formed comprising the solid portion 15, an axial groove 23, an axial tab 29, and a radial tab 30. The elastic ring 28 is then inserted in the axial groove, and the tabs 29 and 30 are pressed together to form the annular flange 16 and fully enclose the ring 28.

REFERENCES:
patent: 3734457 (1973-05-01), Roos
patent: 4120482 (1978-10-01), Cox
patent: 4176675 (1979-12-01), Liberman
patent: 4289296 (1981-09-01), Krause
patent: 4396199 (1983-08-01), Boyd et al.
patent: 4398695 (1983-08-01), Torche

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