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Common faults of pneumatic control valve pneumatic system


Release time:

2022-11-30

Wuxi Xinming automatic control valve industry co., ltd. tells you the common faults of pneumatic control valve pneumatic system Poor quality of the pneumatic control valve is a common pneumatic system failure. Analysis of effects and failures caused by moisture Moisture is formed when the compressor sucks wet air and cools. The moisture of the steam regulating valve causes the components of the pneumatic device to rust and affect the action of the pneumatic components. The effects of moisture are as follows. 1. Pipelines. Cause rust inside the pipeline; pipeline corrosion, resulting in air leakage, container rupture; the bottom of the pipeline stagnant moisture caused by insufficient air flow, increased pressure loss. 2. Components. Rust in the pipeline accelerates the blockage of the filter mesh, causing the filter to fail to work. Rust inside the tube enters the valve, causing poor action and air leakage. Parts that affect pneumatic components, causing poor conversion, air leakage and unstable action; Water droplets invade the valve body, causing poor action; Water droplets enter the components to prevent smooth operation; Water droplets flush lubricating oil, causing poor lubrication and valve failure, the operation of the actuator is unstable; the water droplets in the valve cause insufficient flow and increased pressure loss; the water hammer phenomenon causes component damage. 3. The environment. The discharge water from the exhaust port will pollute the environment. The fault treatment method that can be used for the fault caused by the moisture of the electric control valve is water removal, that is, the compressor outlet temperature drops to make the water contained in the water drop and exclude it. To this end, coolers and separators should be installed and installed after the compressor, and air filters should be installed at the compressor. The horizontal pipe has a certain slope, and the drain valve is installed at the low end. Outlet mount dryer. The water removal measures that can be used are as follows. a. Adsorption water removal method: adsorbing water with materials with strong adsorption capacity, such as silica gel, aluminum gel and molecular sieve, etc. B. Pressure dehumidification method: increase the pressure to reduce the volume and reduce the temperature, thereby precipitating water droplets. c. Mechanical water removal: water removal by mechanical blocking, cyclone separation, etc. D. freezing and water removal: use refrigeration equipment to cool the air to the dew point below, so that water vapor condensation into water precipitation. Analysis of Influence and Failure Caused by Oil The compressor lubricating oil is mixed into the compressed air in the form of oil mist, and the pneumatic control valve is sent out with the compressed air under heat, which is the reason why the compressed air contains oil. The effect of the oil content is as follows. 1. Sealing ring deformation. The sealing ring shrinks, the air leakage valve fails to act, and the output force of the actuator is insufficient; the sealing ring bubbles and swells, the friction force increases, the valve cannot act or the output force of the actuator is insufficient; the sealing ring hardens, the friction surface is worn, and the air leakage increases. Increase; friction increases, the valve and the actuator are not acting properly. 2. The environment. Industrial raw materials chemicals directly contact the air places to change the nature of raw materials chemicals; Industrial furnaces and other places in direct contact with flame cause fire hazard; Metering instruments using air fail due to nozzle blockage; It is required to avoid oil environment extremely. Due to the leakage of oil from the sealing part of valves and actuators, environmental pollution is caused by oil removal filter. For example, with a centrifugal filter in addition to oil mist particles, with activated carbon adsorption or with a porous filter in addition to oil. The above is the content of our company today, if you have any advice, please call our company!

Common faults of pneumatic control valve pneumatic system

Wuxi Xinming automatic control valve industry co., ltd tells youGasDynamic regulating valveCommon faults of pneumatic system
Pneumatic control valvePoor quality of the air supply is a common pneumatic system failure.
Analysis of effects and failures caused by moisture
Moisture is formed when the compressor sucks wet air and cools. The moisture of the steam regulating valve causes the components of the pneumatic device to rust and affect the action of the pneumatic components. The effects of moisture are as follows.
1. Pipelines. Cause rust inside the pipeline; pipeline corrosion, resulting in air leakage, container rupture; the bottom of the pipeline stagnant moisture caused by insufficient air flow, increased pressure loss.
2. Components. Rust in the pipeline accelerates the blockage of the filter mesh, causing the filter to fail to work. Rust inside the tube enters the valve, causing poor action and air leakage. Parts that affect pneumatic components, causing poor conversion, air leakage and unstable action; Water droplets invade the valve body, causing poor action; Water droplets enter the components to prevent smooth operation; Water droplets flush lubricating oil, causing poor lubrication and valve failure, the operation of the actuator is unstable; the water droplets in the valve cause insufficient flow and increased pressure loss; the water hammer phenomenon causes component damage.





3. The environment. The discharge water from the exhaust port will pollute the environment. The fault treatment method that can be used for the fault caused by the moisture of the electric control valve is water removal, that is, the compressor outlet temperature drops to make the water contained in the water drop and exclude it. To this end, coolers and separators should be installed and installed after the compressor, and air filters should be installed at the compressor. The horizontal pipe has a certain slope, and the drain valve is installed at the low end. Outlet mount dryer. The water removal measures that can be used are as follows.
a. Adsorption water removal method: adsorbing water with materials with strong adsorption capacity, such as silica gel, aluminum gel and molecular sieve, etc.
B. Pressure dehumidification method: increase the pressure to reduce the volume and reduce the temperature, thereby precipitating water droplets.
c. Mechanical water removal: water removal by mechanical blocking, cyclone separation, etc.
D. freezing and water removal: use refrigeration equipment to cool the air to the dew point below, so that water vapor condensation into water precipitation.
Analysis of Influence and Failure Caused by Oil






The compressor lubricating oil is mixed into the compressed air in the form of oil mist, and the pneumatic control valve is sent out with the compressed air under heat, which is the reason why the compressed air contains oil. The effect of the oil content is as follows.
1. Sealing ring deformation. The sealing ring shrinks, the air leakage valve fails to act, and the output force of the actuator is insufficient; the sealing ring bubbles and swells, the friction force increases, the valve cannot act or the output force of the actuator is insufficient; the sealing ring hardens, the friction surface is worn, and the air leakage increases. Increase; friction increases, the valve and the actuator are not acting properly.
2. The environment. Industrial raw materials chemicals directly contact the air places to change the nature of raw materials chemicals; Industrial furnaces and other places in direct contact with flame cause fire hazard; Metering instruments using air fail due to nozzle blockage; It is required to avoid oil environment extremely. Due to the leakage of oil from the sealing part of valves and actuators, environmental pollution is caused by oil removal filter. For example, with a centrifugal filter in addition to oil mist particles, with activated carbon adsorption or with a porous filter in addition to oil.


The above is the content of our company today, if you have any advice, please call our company!