Ball valve seat seal

Details Ball valve seat seal Ball valve seat seal

2005-11-29

2005-11-29

Fox, John (Department: 3753)

Valves and valve actuation

Rotary valves

Ball valve

C251S315050

Reexamination Certificate

active

06969047

ABSTRACT:
A ball valve includes a body having a passageway there through with a ball member disposed in the passageway and mounted for selective rotation between valve open and valve closed positions to control fluid flow. A pair of flange grooves are provided in the body on opposite sides of the ball, each flange groove extending radially from the passageway. A pair of seat rings are disposed in the passageway on opposite sides of the ball. Each seat ring has a first sealing surface in contact with an outer surface of the ball and a radially extending annular flange or tab received in an associated one of the flange grooves. The seat design further includes a pair of annular flange seals each disposed in a respective one of the flange grooves. The seat configuration achieves a cantilever effect to improve the temperature and pressure cycling performance of the valve.

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