Electric valve is a product of automatic control valve. It can not only realize the switching function, but also realize the valve position adjustment function. The stroke of electric actuator can be divided into 90 ° angle stroke and straight stroke. Special requirements can also meet the full stroke of 180 °, 270 ° and 360 °. The angle stroke electric actuator is used with the angle stroke valve to realize the 90 ° internal rotation of the valve to control the on-off of pipeline fluid; The straight stroke electric actuator is used with the straight stroke valve to realize the up and down action of the valve plate and control the on-off of pipeline fluid.