Butterfly valve

Details Butterfly valve Butterfly valve

1977-10-31

1979-09-11

Weakley, Harold W.

Valves and valve actuation

With means to increase head and seat contact pressure

With positive reduction

251163, F16K 2500

Patent

active

041672631

ABSTRACT:
Butterfly valve comprising a body and a valve seat arranged therein, on which a valve member is supported. The valve member comprises an operating rod and the assembly of valve member and operating rod has a fixed pivot point at the bottom of the body. The operating rod can be moved by means of pins movable in grooves and slots in such a manner that when the valve is opened the valve member first pivots about the pivot point to lift the valve member from the seat and subsequently rotates about the pivot point to fully open the valve.

REFERENCES:
patent: 2076841 (1937-04-01), Heggem
patent: 3033513 (1962-05-01), Valliez
patent: 3046802 (1962-07-01), Cupedo
patent: 3854696 (1974-12-01), Keyes

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