Device for monitoring the valve lift of a diaphragm valve

Details Device for monitoring the valve lift of a diaphragm valve Device for monitoring the valve lift of a diaphragm valve

1995-09-21

1997-11-11

Rivell, John

Fluid handling

With indicator, register, recorder, alarm or inspection means

Position or extent of motion indicator

137559, 200 6186, F16K 3700

Patent

active

056853360

ABSTRACT:
Device for monitoring the valve lift of a pneumatically or hydraulically driven valve, the valve body of which is actuated by a pressure spindle (16), specificelly a diaphragm valve where a drive spindle (20) and pressure spindle (16) are effectively connected. Two trip cams (38, 40) separated by the distance (a) are mounted on the drive spindle (20) to activate two limit switches (34,35) that act as position indicators for the two valve positions, whereby one trip cam (38, 40) is assigned to one limit switch (34, 35). The automatic positioning of the trip cams (38, 40) during the initial actuation of the valve is accomplished by a crossbar (36) that acts as a driver and is located between trip cams (38, 40). The trip cams (38,40) are mounted on drive spindle (20) by moveable clamps.

REFERENCES:
patent: 2973009 (1961-02-01), Kazyaka
patent: 3189700 (1965-06-01), Eidson
patent: 3367365 (1968-02-01), Stevens
patent: 3390943 (1968-07-01), Myers
patent: 3416566 (1968-12-01), Anderson
patent: 3789875 (1974-02-01), McGee
patent: 3949963 (1976-04-01), Aoki
patent: 4353390 (1982-10-01), Karpenko
patent: 4858937 (1989-08-01), Fairlie-Clarke et al.

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