Position detector for clapper of non-return valve

Details Position detector for clapper of non-return valve Position detector for clapper of non-return valve

1987-11-16

1988-10-18

Rivell, John

Fluid handling

With indicator, register, recorder, alarm or inspection means

Position or extent of motion indicator

324207, 34087031, 1375278, F16K 3700

Patent

active

047779799

ABSTRACT:
A non-return valve for a steam turbine steam line includes a housing and a clapper swingably mounted in the housing for angular movement between open and closed positions. A metal proximity detector is mounted on the interior surface of the cover for the valve access opening and adjacent the open position of the valve. Movement of the clapper away from its open position results in a signal providing an indication that the valve clapper is away from its open position.

REFERENCES:
patent: 3017621 (1962-01-01), Taborsky
patent: 3857277 (1974-12-01), Moore
patent: 3859619 (1975-01-01), Ishihara et al.
patent: 3896280 (1975-07-01), Blake
patent: 4316145 (1982-02-01), Tann
patent: 4353523 (1982-10-01), Palti
patent: 4468559 (1984-08-01), Hurst et al.
patent: 4569365 (1986-02-01), Namand et al.
patent: 4600034 (1986-07-01), Ko
patent: 4618824 (1986-10-01), Magee et al.
patent: 4639668 (1987-01-01), Petit et al.

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