This Quarter-Turn Electric Actuator is combination of a Multi-Turn Electric Actuator(HK/HKM Series) with Part-Turn gearbox. It can reach the torque around 300,000Nm. Normally used for big size/high pressure Ball Valve,Butterfly Valve and other Quarter-Turn Valve or Damper. And because of our Multi-Turn Electric Actuator(HK/HKM Seris) can reach ExdⅡCT4. So,it’s also applied in somewhere need ExdⅡCT4 explosion proof.