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1. Aging or damage of sealing components
The seals inside the pneumatic actuator (such as O-rings, gaskets, etc.) are prone to aging, wear, or deformation after long-term use, leading to gas leakage.
2. Loose connection parts
If the screws at the connection points of pipeline joints, cylinder heads, or flanges are loose or not tightly connected, air leakage may occur.
3. Scratches inside the cylinder
Scratches or wear on the internal surface of the cylinder can damage the sealing and cause compressed air to leak from the damaged area.
4. Valve or pipeline issues
There may be leaks in the external pipeline interface or valve itself, which may be mistaken as actuator leakage.
2、 Measures to prevent leakage of double acting pneumatic actuators
1. Choose good sealing components
*Choose wear-resistant and high-temperature resistant sealing materials, such as nitrile rubber (NBR), fluororubber (FKM), etc., to adapt to different working environments.
*Regularly inspect the seals and replace them promptly if aging or wear is found.
2. Ensure that the connection parts are securely fastened
*Regularly inspect the various connection parts of the actuator, such as the cylinder head, pipeline joints, and flanges, to ensure that screws or nuts are not loose.
*Use anti loosening glue or anti loosening gaskets during installation to increase the stability of the connection.
3. Protect the interior of the cylinder
*Use good lubricating oil to maintain internal lubrication of the cylinder and reduce friction between the piston and the cylinder.
*To prevent impurities from entering the cylinder, regularly clean the filter and dryer in the compressed air system to prevent solid particles from damaging the cylinder surface.
4. Regularly inspect the pneumatic system
*Use soapy water to test the sealing of the air circuit interface. Quickly locate the leak point by applying soapy water to observe for the formation of bubbles.
*Check for any cracks or looseness in the external pipelines and valves, and promptly repair them.
5. Install leak prevention devices
*Add pressure relief valves or one-way valves at key parts of the actuator to prevent air backflow and leakage.
*If the working environment has high humidity, it is recommended to install a drain valve to reduce the entry of moisture into the cylinder and prevent corrosion.
3、 Daily maintenance suggestions for double acting pneumatic actuators
1. Regularly check the sealing performance
Regularly conduct comprehensive inspections of seals and interfaces every month, and promptly replace worn or aging components.
2. Clean the compressed air system
The use of air containing moisture and impurities is an important cause of cylinder failure. Air dryers and filters should be equipped to ensure the quality of compressed air.
3. Lubricate on time
Regularly add an appropriate amount of lubricating oil to the interior of the cylinder to maintain smooth movement of the cylinder and piston, and extend the life of the seals.
4. Record and maintain history
Develop a detailed equipment maintenance plan, record the time and operational status of component replacement, and anticipate potential issues in advance.
4、 Summary
The key to preventing air leakage in double acting pneumatic actuators lies in proper use and timely maintenance. By selecting good sealing components, regularly inspecting connection parts, protecting the interior of the cylinder, cleaning the air system, and other measures, the risk of air leakage can be significantly reduced, and the service life of the equipment can be extended.
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