It is mainly used in the series of gear box damper, butterfly valve, ball valve plug valve 90° on-off condition, its size can be customized according to the use of site base. Output torque from 300Nm to 400000Nm, the directory provides only 9 of the base of the conventional connection size, flexible product design, easy to install, supporting the ball type hinge reasonable. Speed ratio gear box according to the opening time of the scene, the electrical input torque and the speed of loading was adjusted to select the input Dianzhuangyou so many choices, the input torque of different speed and different combination to use reasonable site conditions.