Servo butterfly valve and vane

Details Servo butterfly valve and vane Servo butterfly valve and vane

1974-04-02

1976-07-27

Schwadron, Martin P.

Fluid handling

Systems

Sequentially progressive opening or closing of plural valves

251305, F16K 122

Patent

active

039714144

ABSTRACT:
The butterfly valve vane is constructed with a main vane portion and a movable servo tab. The servo tab is controlled to open relative to the main vane portion in order to define an auxiliary flow path so that the flow forces acting on the vane create a substantially zero closing moment. The servo tab can be moved by a linkage means integrally connected with the control shaft on which the vane is mounted or can be moved by a separate actuator.

REFERENCES:
patent: 1014328 (1912-01-01), Podlesak
patent: 1568410 (1926-01-01), Minter
patent: 1852918 (1932-04-01), Chandler et al.
patent: 2271390 (1942-01-01), Dodson
patent: 2796082 (1957-06-01), Green et al.
patent: 3070345 (1962-12-01), Knecht
patent: 3147768 (1964-09-01), Kennedy

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