A method of evaluating degradations throughout a MOV (i.e. motor operated valve) by establishing specific interrelationships between a power related parameter from the MOV motor (being, for an AC motor, preferably the motor load; and being, for a DC motor, preferably motor torque or motor torque factor)...http://www.google.com/patents/US5239874?utm_source=gb-gplus-sharePatent US5239874 - Method of monitoring the condition of a motor operated valve system
