High temperature ball valve

Details High temperature ball valve High temperature ball valve

1979-09-19

1981-09-01

Schwadron, Martin P.

Fluid handling

Destructible or deformable element controlled

Heat destructible or fusible

13724622, 251174, 251315, F16K 2500, F16K 522

Patent

active

042866146

ABSTRACT:
A ball valve includes a metal valve seat (36) carrying a relatively soft insert (40) which seals against a ported ball member (22). A packing ring (72) surrounding the seat is compressed between a spring loaded metal wedge (84) and a metal backup ring (66) to provide a seal between the seat and valve body. If the soft seals are destroyed by fire, the metal seat is pressed against the ball member to provide a metal-to-metal seal. Additional metal-to-metal seals are provided between the seat and valve body by the metal wedge and backup ring.

REFERENCES:
patent: 3174495 (1965-03-01), Anderson et al.
patent: 3315697 (1967-04-01), Oliver
patent: 3346234 (1967-10-01), Allen
patent: 3392743 (1968-07-01), Pennington
patent: 3421733 (1969-01-01), Stewart, Jr.
patent: 3575198 (1971-04-01), Ellis
patent: 3752178 (1973-08-01), Grove et al.
patent: 3760833 (1973-09-01), Kemp et al.
patent: 3990465 (1976-11-01), Allen
patent: 4108196 (1978-08-01), Calvert
patent: 4160460 (1979-07-01), Kemp

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