Testing a solenoid of a directional control valve
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United States of America Patent
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Nov 28, 2017
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N/A
app pub date -
Feb 17, 2012
filing date -
Feb 18, 2011
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Abstract
A method of testing a solenoid of a directional control valve in a subsea hydrocarbon production system, the solenoid having a coil and an armature for operating the valve and the coil being energized by a drive voltage across it, the method comprises removing or reducing the drive voltage and sensing current through the coil to produce an indication of movement of the armature.
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