How to choose a reasonable regulating valve product?

Control valve is the industrial process control system in the end of the implementation of components, industrial processes in continuous production of automatic control systems generally need to use control valves to control the process of production of a variety of process parameters, to achieve the pressure, temperature, flow and level of the fluid and other parameters of the adjustment, usually called the industrial process automation of the production of the "hands and feet".
The quality of its application is directly reflected in the system's regulatory quality. As a process control in the end of the executive element, people have a deeper understanding of its importance than in the past. Regulating valve application of good or bad, in addition to product quality and whether the user is the correct installation, use and maintenance, the correct calculation of the selection is very important. As a result of calculation and selection errors, resulting in unstable operation of the system, and some even can not be put into use in many cases. Therefore, users and system designers should fully recognize the importance of control valves in the field, and must pay enough attention to the selection of control valves.

Principles of regulating valve selection：

1,According to the process conditions, select the appropriate structural form and material.

2,According to the characteristics of the process object, select the flow characteristics of the control valve.

3,According to the process operating parameters, select the appropriate control valve caliber size.

4,According to the requirements of the process, select the required auxiliary devices.

5,Reasonable selection of actuators. The response speed of the actuator should be able to meet the requirements of the process on the control of the travel time: the selected control valve actuator should be able to meet the requirements of the valve stroke and the process on the leakage level. In some occasions, such as the selection of pressure control valves (including venting valves), should consider the actual possible differential pressure for appropriate amplification, that is, the actuator is required to provide a larger force. Otherwise, may be when the process of abnormal conditions, the actual pressure difference between the front and rear of the control valve is large, will not be able to close or open the danger.