1、 Determine the output torque of the electric actuator based on the required torque of the valve

The torque required for valve opening and closing determines the output torque chosen for electric actuators. Generally, it is proposed by the user or selected by the valve manufacturer. As an actuator manufacturer, they are only responsible for the output torque of the actuator. The torque required for normal valve opening and closing is determined by factors such as valve diameter and working pressure, but there are differences in processing accuracy and assembly process among valve manufacturers, So the torque required for valves of the same specification produced by different manufacturers also varies, even for valves of the same specification produced by the same valve manufacturer. When selecting the type, selecting too small a torque for the actuator can cause the valve to not open and close normally. Therefore, it is necessary to choose a reasonable torque range for the electric actuator.

2、 Determine electrical parameters based on the selected electric actuator

Due to the differences in electrical parameters among different actuator manufacturers, it is generally necessary to determine their electrical parameters during design and selection, mainly including motor power, rated current, secondary control circuit voltage, etc. Negligence in this regard often leads to mismatched parameters between the control system and the electric actuator, resulting in faults such as tripping during operation, fuse blowing, and thermal overload relay protection tripping.