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Maintenance and installation principle of pneumatic control valve


Release time:

2021-07-27

Pneumatic control valveAt present, it is widely used, and there are many varieties of different doors, but we need to be prepared in the process of application. Let's take a look at the protection and device principles of pneumatic regulating valve with Xinming automatic control!

Maintenance and installation principle of pneumatic control valve

Pneumatic control valveAt present, it is widely used, and there are many varieties of different doors, but we need to be prepared in the process of application. Let's take a look at the protection and device principles of pneumatic regulating valve with Xinming automatic control!
Pneumatic control valve in the use of the process of the occurrence of problems, will be the normal and stable operation of the system to produce great harm, thus requiring the protection of the control valve, the incidence of the decline in the control valve.
1. Passive protection of pneumatic control valve
When the pneumatic control valve has a problem, the control valve should be overhauled to find out the cause of the problem and repair it in time.
2. Pneumatic control valve preventive protection
Regulating valve for regular cleaning, adhere to the health of the valve and the integrity and durability of all components, regular flushing of the pipeline, pay attention to the blockage and garbage in the pipeline, the fixed parts of the regulating valve for regular inspection, to ensure that the anti-corrosion performance of the components good lubrication.
Pneumatic control valve in the device, the reduction of the device in the hard bending phenomenon, drop pressure and reduce deformation. Adhere to the interval between the regulating valve and the compressor, and reduce the vibration from the vibration source. To regularly inspect the control valve, close attention to the operation of the control valve, check whether the filler leaks, and add lubricating oil to the filler regularly.
3, pneumatic control valve speculative protection
Through the intelligent instrument or other diagnosis equipment to obtain the operation information of the control valve, strengthen the control valve adjustment quality and diagnosis function. Through the diagnosis of intelligent instruments or other diagnostic 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 positioner.
Principle of pneumatic control valve device
(1) The position of the pneumatic control valve device is required to have a certain height from the ground, and a certain space should be left up and down the valve for disassembly and repair of the valve. Regarding control valves equipped with pneumatic valve positioners and handwheels, it is necessary to ensure convenient operation, observation and adjustment.
(2) the control valve should be mounted on the horizontal pipe, and up and down with the pipe vertical, generally to be supported under the valve, to ensure a solid. On special occasions, when the control valve is required to be horizontally mounted on a vertical pipeline, the control valve should also be supported (except for small-diameter control valves). When the device, to avoid to the control valve to bring additional stress).
(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) before and after the control valve should have a straight pipe section, the length of not less than 10 times the pipe diameter (10D), in order to avoid the valve straight pipe section is too short and affect the flow characteristics.