... water or seawater with lever/worm gear box/electric actuator. DN50-DN4500, PN6/10/16/25, available material ... rate and which can be used in metallurgy, chemical, electrical, municipal engineering, pipeline engineering etc. Appropriate medium: Water, ... ~90° ; 6. Besides worm gear and level, electrical actuator, pneumatic actuator, hydraulic actuator can be used either; 7. Better flow characteristics, ...