1.Determine electrical parameters based on the selected electric actuator
Due to the differences in electrical parameters among different electric 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 results in mismatched parameters between the control system and the electric actuator, causing faults such as air trip, fuse melting, and thermal overload relay protection tripping during operation.
2.Determine the output torque of the electric actuator based on the torque required by the valve
The torque required for valve opening and closing determines the output torque of the electric actuator, which is generally proposed by the user or selected by the valve manufacturer. As the 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 size and working pressure. However, due to differences in processing accuracy and assembly technology among valve manufacturers, the torque required for valves of the same specification produced by different manufacturers also varies. Even valves of the same specification produced by the same valve manufacturer may have different torques. If the torque selected for the actuator is too small, it will cause the valve to be unable to open and close normally. Therefore, electric actuators must choose a reasonable torque range.
