Maintenance and installation principles of pneumatic control valves
Pneumatic control valves are now widely used, and there are many varieties of sub-doors, but we need to be prepared during the application process. Let's take a look at the protection and device principles of pneumatic control valves together with Xinming Automation!
Pneumatic control valve malfunctions during use will cause great harm to the normal and stable operation of the system. Therefore, it is required to protect the control valve and reduce the incidence of control valve malfunctions.
1. Passive protection of pneumatic control valve
When a problem occurs in the pneumatic control valve, the control valve should be overhauled to find out the cause of the problem and repair it in time.
2. Preventive protection of pneumatic control valve
Regularly clean the regulating valve, adhere to the sanitation of the regulating valve and the integrity and durability of each component, flush the pipeline regularly, pay attention to obstructions and garbage in the pipeline, and check the fixed connections of the regulating valve regularly to ensure the components The anti-corrosion performance and good lubricity.
When installing the pneumatic control valve, the hard pull and hard bend phenomenon in the device are reduced, the pressure is reduced, and the deformation is reduced. Adhere to the distance between the regulating valve and the compressor to reduce vibration from the source of vibration. It is necessary to inspect the regulating valve regularly, pay close attention to the operation of the regulating valve, check whether the packing is leaking, and add lubricating oil to the packing regularly.
3. Predictive protection of pneumatic control valve
Obtain the operating information of the regulating valve through smart meters or other diagnostic equipment, and strengthen the regulating quality and diagnostic function of the regulating valve. Through the diagnosis of the intelligent instrument or other diagnosis equipment, the problems of the regulating valve can be found in time, and the treatment measures can be found in time for protection. Increase the development and application of intelligent valve positioners.
Principles of Pneumatic Control Valve Device
(1) The position of the pneumatic control valve device must be at a certain height from the ground, and a certain space must be left above and below the valve to facilitate the disassembly and repair of the valve. Regarding the regulating valve equipped with a pneumatic valve positioner and a hand wheel, it is necessary to ensure convenient operation, observation and adjustment.
(2) The regulating valve should be installed on a horizontal pipeline and vertical to the pipeline up and down. Generally, it should be supported under the valve to ensure stability. Regarding special occasions, when the horizontal installation of the regulating valve is required on a vertical pipeline, the regulating valve should also be supported (except for the small-diameter regulating valve). When installing, avoid adding additional stress to the regulating valve).
(3) The working environment temperature of the regulating valve should be (-30～+60) relative humidity not more than 95% 95%, relative humidity not more than 95%
(4) There should be straight pipe sections in the front and rear positions of the regulating valve, with a length not less than 10 times the pipe diameter (10D), to avoid that the straight pipe section of the valve is too short and affects the flow characteristics.
