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

1987-09-03

1989-09-26

Cuchlinski, Jr., William A.

Measuring and testing

Blower, pump, and hydraulic equipment

364550, G10M 1900

Patent

active

048691020

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 output power (motor load) of the valve operator motor to the valve operator stem load, setting up a threshold 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 threshold 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 et al.
patent: 4542649 (1985-09-01), Charbonneau et al.
patent: 4570903 (1986-02-01), Crass
Square D Company of Milwaukee, WI., Product Information Package Consisting of (a) Instruction Sheet for Class 8430 Type G Load Converter Relays, Nov. 83; (b) Bulletin M-629-Product Data-Sub.: Load Monitoring for Three Phase Induction Motors Using Class 8430 Type V Load Detector & Type G Converter, 1984; (c) Product News Control Products IC-2777, Class 8430, Nov. 1983.
Advertisement by Movats Incorporated entitled "Verifying Motor Operated Valve Operability from Motor Control Center", Jul. 1986.

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