Questions regarding valves
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Dear teachers, when replacing a valve’s actuator and positioner, what parameters need to be determined?
Since the valve operation parameters and connection dimensions vary from one unit to another, when replacing the actuator, it is necessary to provide the actuator supplier with: the valve’s model specifications, manufacturer, and operating conditions； Model specifications of existing actuators, parameters such as opening and closing torque, and connection plate specifications
Check what type of valve it is. If it’s a ball valve, the connection dimensions and torque values are required. For gate valves and stop valves, the connection interfaces for domestic actuators – those from Chongqing Chuanyi – differ from those of the Yangzhou series; it’s necessary to consider the specific circumstances. For any technical questions, you can contact me via WeChat at 15858010560
It is necessary to know what type of valve it is, its diameter, the pressure before and after the valve, the flow rate, and whether feedback is required
If it is a rotary valve, it is necessary to know the torque as well as the connection dimensions between the valve stem and the actuator. For a linear stroke valve, it is necessary to know the output of the actuator mechanism as well as the connection dimensions.
The connection plates of actuators generally have the same dimensions, and intelligent positioners all come equipped with automatic function testing capabilities
In terms of technical parameters, the thrust and stroke of the original cylinder are required, as well as whether there is a handwheel. If thrust parameters are not available, then the medium-related parameters must be provided: inlet pressure, outlet pressure, temperature, and flow rate. Structurally, it is necessary to consider the flange dimensions, the valve stem thread dimensions, and the length to which the valve stem extends.