Pneumatic operated valve stroke timing

Details Pneumatic operated valve stroke timing Pneumatic operated valve stroke timing

1993-05-28

1994-07-19

Rivell, John

Fluid handling

Processes

Cleaning, repairing, or assembling

137552, 137554, 137557, 251 3001, 73168, F16K 3700

Patent

active

053299566

ABSTRACT:
A non-intrusive method for timing the full operational motion of a valve plug (26) in an electrically actuated, pneumatically operated valve (10). An actuation signal is sent to the valve actuator (54). A coil of wire (68) around the valve actuator solenoid (56), an accelerometer (70) on the solenoid slug (64), or a connection to a permanent pressure sensor (72), non-intrusively senses arrival of the actuation signal at the valve. The time measuring equipment (12) begins timing when the actuation signal is sensed. A laser valve motion sensor (74) then non-intrusively senses when the valve plug reaches a limit of motion. The time measuring equipment ends timing when the valve plug reaches a limit of motion. The time measuring equipment then records the elapsed time from the sensing of the arrival of actuation signal to the final limit of motion of the valve plug.

REFERENCES:
patent: 4059960 (1977-11-01), Osborne
patent: 4523286 (1985-06-01), Koga et al.
patent: 4617960 (1986-10-01), More
patent: 4712071 (1987-12-01), Charbonneau et al.
patent: 5193568 (1993-03-01), Eissenberg et al.

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