The importance of the control valve selection is mainly manifested in where

Control valve as the terminal device in process control, the people of the importance of it, compared with the past has updated. The stand or fall of pneumatic control valve applied, in addition to product quality, the user is correct installation, use, maintenance, calculation, selection is very important to correctly. Pneumatic control valve is the actuator in automatic control system, its application quality direct response on system control quality. System due to on the selection of calculation error, starting and stopping, some even can't putting-in-service proactively, so for the user and the system design personnel should know the importance of the valve at the scene, must cause enough attention to the pneumatic control valve selection. Control valve selection principle of 1, according to the process conditions, select the appropriate structural form and material 2, according to the characteristics of the process object, choose the flow characteristic of control valve 3, according to the process operating parameters, select the appropriate control valve diameter size 4, according to the requirement of the process, select the desired auxiliary equipment 5, the reasonable choice of actuators. The response speed of the actuator should be able to meet the process