These are quarter turn gear actuators, suitable for ball valves, butterfly valves, plug valves and Rotary valve etc. The housing  is  precisely casting, with  fresh pattern and nice appearance. It transmitted by worm gear and worm, with self-locking function. Tapered roller bearing and thrust ball  bearing combination makes the transmission more flexible and efficient. Max-torque of actuators matches with connecting flange standard, stem diameter and install height are all  international standard. The connectting flange adapts to ISO.5211 makes it easy working with valves. Protection grade can be IP65, IP67, IP68 and Immersion mode according to customers requirements.