The Moog Valve Checker is a portable test instrument intended for in field checking of the complete range of Moog proportional and servovalves. It is connected “in line” between the plant electronics and the valve so checking of the valve is made without removing it from the plant, so that hydraulic and electronic problems can be isolated.

The Checker operates in two modes:“Checker” and “Plant”. In “Checker” mode, commands to the valve come from the Checker and the valve spool and pressure signals are monitored on the Checker.The “Plant” command is disconnected and the spool and/or pressure signals are not connected back to the plant electronics. In “Plant” mode, the Checker is a monitor with the plant electronics commanding the valve and the spool and/or pressure signals passing back to the plant and also available for monitoring on the Checker.

Internal power is derived from the plant supply line to the valve or from an external 24 V supply that connects to a front panel connector on the checker.

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