Fluid handling – With cleaner – lubrication added to fluid or liquid sealing... – Cleaning or steam sterilizing
Patent
1989-06-20
1990-07-03
Walton, George L.
Fluid handling
With cleaner, lubrication added to fluid or liquid sealing...
Cleaning or steam sterilizing
137240, 251328, 251329, F16K 302, F16K 3316, B08B 902
Patent
active
049382500
ABSTRACT:
A knife gate valve for regulating particular material flow in a pneumatic or vacuum covering system. An actuated, reciprocative gate is mounted within the valve housing on guide bars which define the path of gate movement between open and closed positions. The guide bars seal the side edges of the gate and the adjacent portion of the lower gate surface. A seal plate is loaded by a pair of o-rings to seal against the top gate surface. Transverse seals are accessible for cleaning or replacement through releasable side seal assemblies. Fluid ports allow the transverse seals to be lubricated in place or air purged. The guide bars are cleaned by the gate during closure with the opposed gate surfaces being cleaned by the seal plate and an underlying wiper bar during gate movement. The cleaning actions cooperate with dynamic loading of the various seals to assure a proper seal about the gate upon closure.
REFERENCES:
patent: 2550984 (1951-05-01), Ferguson
patent: 2669416 (1954-02-01), Hilton
patent: 2982295 (1961-05-01), Williams
patent: 2982513 (1961-05-01), Krummel
patent: 3000608 (1961-09-01), Williams
patent: 3945606 (1976-03-01), McDonald
patent: 4201365 (1980-05-01), Paptzun et al.
patent: 4221307 (1980-09-01), Peterson
patent: 4257447 (1981-03-01), Clarkson
patent: 4383546 (1983-05-01), Walters, Jr.
patent: 4773627 (1988-09-01), King et al.
Salina Vortex Corp.
Walton George L.
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