Butterfly type control valve

Details Butterfly type control valve Butterfly type control valve

1994-11-23

1996-01-02

Fox, John C.

Valves and valve actuation

Rotary valves

Butterfly

251127, F16K 122

Patent

active

054801230

ABSTRACT:
The present invention relates to a butterfly type control valve.
This valve (30) comprises a body (31) defining a housing (32) for a mobile plug (13), rotating about an axis (14). The housing (32) is extended by an inlet channel (15) and an outlet channel (16), thus defining a connection passage between the inlet channel and the outlet channel. The effective cross section of this passage and therefore the flow rate of the fluid flowing through the valve are controlled according to the angular position of the plug (13). Furthermore, this valve comprises an element which generates a drop in pressure (18) provided with several calibrated passages (19) with a small diameter, located between the inlet channel (15) and a part of the housing, in a peripheral area of said housing (32).
The valve makes it possible to reduce cavitation, noise and wear and tear of the valve by creating a considerable drop in pressure when the valve is slightly open, whilst allowing a greater control range.

REFERENCES:
patent: 2010694 (1935-08-01), Jones
patent: 3234966 (1966-02-01), Klose
patent: 3238955 (1966-03-01), Lassiter, Jr.
patent: 4271866 (1981-06-01), Bey

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