The electric actuator may be classified as such two ranges as controllable and simple type, both are completely identical in mechanical structure of which quarter turn output valve electric actuator is composed multi-turn type as the basic one in combination with worm gear and worm reducer. Main difference between two ranges lies in electric part. Controllable type is provided with electric control box which is equipped with AC contator and master control board therein, electric end may be operated when three-phase 380VAC power is suplied. Simple type is only provided with wiring terminal disc and can not be operaed unless AC contactor is added externally.

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