Motor operated valve (MOV) is an ordinary ball
valve or any other valve that operated by an electric actuator. In general, the
MOV is used as isolation valves for equipment which requires regular access. The
MOV is also used on any valve that the total energy required to open or close
the valve manually is large. No specific reason regarding why MOV is used except
from ease of operation point of view.
The typical MOV construction consist of electric
motor actuator, gear box, and the valve it self. First of all, the motor is
rotated by applied an AC voltage to it. The motor rotation then transferred
through a gear mechanism to the output thrust part. The output thrust is then
transferred to the gear mechanism in the gear box to rotate the valve
stem.
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