Valve seat insert

Details Valve seat insert Valve seat insert

1977-03-07

1978-09-19

Weakley, Harold W.

Valves and valve actuation

Rotary valves

Butterfly

251307, 251173, F16K 122

Patent

active

041148568

ABSTRACT:
A valve seat insert is disclosed which is useful in a butterfly valve of the type disclosed and claimed in U.S. Pat. No. 3,608,861. In such valves, disc and sealing ring contact pressure is enhanced by fluid pressure in the fluid line regardless of the direction of fluid pressure. The valve seat mechanism provides a fulcrum to control deflection of the seat ring when the seat is pressurized from the stem side, and also, by means of an insert with a locking ridge, limits undesirable inward radial movement of the seat ring.

REFERENCES:
patent: 3144040 (1964-08-01), White
patent: 3552407 (1971-01-01), Hirano
patent: 3608861 (1971-09-01), Helman
patent: 3650508 (1972-03-01), Kosmala
patent: 3658292 (1972-04-01), Takigawa
patent: 3774880 (1973-11-01), Crookham
patent: 3986699 (1976-10-01), Wucik
patent: 4005848 (1975-02-01), Eggleston

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