HKC ET-S/C Series pneumatic actuator is a heavy duty scotch yoke actual that consisted of symmetrical and canted type and offer complete modular system. By appling to double acting and spring return configuration, our compact ET-S/C series can be suited for torque output of any valve such as ball, butterfly, plug valves and other quarter turn mechanism. ET-S/C series are also designed to use with Hydraulic override, Limit switches, Solenoid valve and Positioner by built-in air tubing at the factory.