Diaphragm valve

Details Diaphragm valve Diaphragm valve

1989-09-18

1990-11-06

Walton, George L.

Valves and valve actuation

Limit stop

Adjustable

251229, 251245, 251331, F16K 716, F16K 3160, F16K 5100

Patent

active

049680030

ABSTRACT:
A diaphragm valve includes alternative actuator structures. The first actuator arrangement includes an adjustable nut received on a bonnet portion of the valve for adjusting the stroke of an actuating stem. According to a first alternative arrangement, a sleeve is interposed between a biasing spring and an actuating member to limit the closing force imposed on the diaphragm. A stop defined on the bonnet limits axial movement of the actuating stem so that the spring eventually imposes the entire closing force on the diaphragm. In yet another embodiment, actuating pressure is reduced through incorporationh of a dual pistion actuator arrangement.

REFERENCES:
patent: 1990635 (1935-02-01), Buttner
patent: 2805040 (1957-09-01), Voss
patent: 2855176 (1958-10-01), Boteler
patent: 3434694 (1969-03-01), Skinner
patent: 3982729 (1976-09-01), Tricini
patent: 4014514 (1977-03-01), Priese et al.
patent: 4505451 (1985-03-01), Jonas

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