Diagnostic apparatus and method for fluid control valves

Details Diagnostic apparatus and method for fluid control valves Diagnostic apparatus and method for fluid control valves

1990-04-10

1990-12-11

Cuchlinski, Jr., William A.

Measuring and testing

Blower, pump, and hydraulic equipment

7386232, 1374875, 364558, G01M 1900, F16K 3700, G01L 500

Patent

active

049761447

ABSTRACT:
Apparatus and method for diagnostically testing and determining the operating condition of a pneumatically operated valve. A diagnostic controller is connected to a valve actuator assembly so that diaphragm pressure and valve plug movement among other inputs can be sensed while the valve actuator assembly is stroked through a test operation cycle. The sensor output signals are then used in selected graphical plots to provide information which can be analyzed to indicate the condition of the valve in such areas as spring adjustment, stroking time, valve travel, stem friction, seat load, and positioner and transducer calibration.

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