Butterfly valve protector

Details Butterfly valve protector Butterfly valve protector

1983-12-07

1985-07-09

Schwadron, Martin P.

Valves and valve actuation

With material guide or restrictor

251305, 137246, F16K 122

Patent

active

045277710

ABSTRACT:
A valve comprising a valve body, a butterfly valve element pivotally mounted within the body and a guard closely adjacent the upstream edge of the valve element in the open position. The guard protects the upstream edge of the valve element from the fluid stream passing through the valve. The guard may also be used for injecting a purging material or a sealant onto the edge of the valve element, for carrying a seal and for providing an impedance to the fluid stream to reduce the fluid forces acting on the stream which tend to move the valve element toward the closed position. The guard is carried by a removable guard mounting ring.

REFERENCES:
patent: 1383482 (1921-07-01), Popp
patent: 1824168 (1931-09-01), Orton
patent: 3256897 (1966-06-01), Carlton
patent: 3426581 (1969-02-01), Briggs
patent: 3958595 (1976-05-01), Al et al.
patent: 4295632 (1981-10-01), Engelke
patent: 4318422 (1982-03-01), Nakanishi et al.
Posi-Seal International, Inc., Brochure No. PSI-160-011.

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