Method and apparatus for remote monitoring of valves and valve o

Details Method and apparatus for remote monitoring of valves and valve o Method and apparatus for remote monitoring of valves and valve o

1986-04-04

1989-05-23

Cuchlinski, Jr., William A.

Measuring and testing

Blower, pump, and hydraulic equipment

7386228, G01M 1900

Patent

active

048318736

ABSTRACT:
A method and apparatus for providing a previously unattainable yet desirable function of monitoring at a remote location and/or in a remote (non-intrusive) manner the condition of a valve operator to signal a need for more thorough inspection and for possible maintenance of the valve or valve operator; the method and apparatus including the relating of power parameters such as motor power and motor power factor to the valve operator stem load, setting up a control value for the power parameter based on a maximum allowable operator thrust depletion; and periodically monitoring actual power parameter values at a remote location for comparison to the control value.

REFERENCES:
patent: 4029122 (1977-06-01), Jaegtnes
patent: 4123009 (1978-10-01), Kilpinen
patent: 4321529 (1982-03-01), Simmonds et al.
patent: 4333118 (1982-06-01), Comstedt
patent: 4542649 (1985-09-01), Charbonneau et al.
patent: 4551808 (1985-11-01), Smith et al.
patent: 4570903 (1986-02-01), Crass
Square D-Class 8430 Type G Load Converter Relays-Instruction Sheet 63080-003-01, Nov., 1983.
Square D-Product Data-Bulletin M-629 Load Monitoring For Three Phase Induction Motors-Apr., 1984.
Square D-Product News-Control Products-Load Detector and Load Converter Relays Type V and G-IC-277, Class 8430, Nov. 1983.

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