What should be paid attention to when purchasing valve electric device
The electrical parameters are determined according to the selected valve electric device. Because the electrical parameters of different valve electric device manufacturers are different, generally the electrical parameters need to be determined when designing and selecting, mainly including motor power, rated current, secondary control loop voltage, etc. It is often negligent in this regard, and as a result, the mismatch between the control system and the valve electric device parameters causes the faults such as air-open tripping, fuse blowing, and thermal overload relay protection tripping during work.
Valve electric device failure analysis and troubleshooting table
The output torque of the valve electric device is determined according to the torque required by the valve. The torque required to open and close the valve determines the output torque of the valve electric device. Generally, it is proposed by the user or selected by the valve manufacturer. As an actuator manufacturer, only the The output torque of the actuator is responsible. The torque required for the normal opening and closing of the valve is determined by the valve diameter, working pressure and other factors. However, due to the difference in processing accuracy and assembly technology of valve manufacturers, the torque required by valves of the same specifications from different manufacturers There are also differences. Even the torque of valves of the same specification produced by the same valve manufacturer is also different. When the torque of the actuator is selected too small, the valve cannot be opened and closed normally. Therefore, the valve electric device must choose a fair torque range. .