Knife gate valve

Details Knife gate valve Knife gate valve

1990-03-13

1991-05-14

Rosenthal, Arnold

Fluid handling

Removable valve head and seat unit

251326, 251327, 251329, F16K 302

Patent

active

050147307

ABSTRACT:
A knife gate valve wherein the seat for sealing against the knife gate is provided on a separate removable/replaceable carrier portion mounted to the body of the valve. The seat may be a metal rim for metal-to-metal sealing or it may carry a resilient seal. Removable, seat carrying carriers can be provided on both sides of the knife gate for bi-directional control of the slurry flow. The seats may include seals that are sandwiched between the body and the carriers to insure against dislodgement. The seals may include a two-part seal with a non-exposed resilient seal that is urged by a resilient O-ring into bubble tight sealing against the knife gate.

REFERENCES:
patent: 4112969 (1978-09-01), Still
patent: 4201365 (1980-05-01), Paptzun et al.
patent: 4603864 (1986-08-01), Raftis
patent: 4773627 (1988-09-01), King et al.
patent: 4798365 (1989-01-01), Mayhew

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