Common Faults And Treatment Methods Of Pneumatic Actuators

Pneumatic actuators may have some faults during long-term use. The following is an introduction to common faults of pneumatic actuators and their treatment methods, hoping to help everyone.
1. Actuator does not move
1. Air source failure: If the air source pressure is insufficient or interrupted, the actuator will not move. First check the air source pressure to ensure that it is within the normal range. If there is a problem, adjust or replace the air source equipment.
2. Solenoid valve failure: Damage to the solenoid valve or abnormal control signal will also cause the actuator to not move. Test the working status of the solenoid valve, replace the solenoid valve if necessary, and check the integrity of the control signal.
3. Pipeline blockage: Blockage or leakage of the air source pipeline will hinder the smooth flow of air. The pipeline should be checked and cleaned, and the problematic pipeline should be repaired or replaced.
4. Internal fault of the actuator: internal mechanical parts are worn or stuck. Disassemble the actuator, check and repair or replace damaged parts.
2. Slow or weak movement
1. Insufficient air source pressure: The air source pressure is lower than the working requirements of the actuator, which will cause slow or weak movement. The air source pressure should be adjusted to meet the required range of the actuator.
2. Poor lubrication: Lack of lubrication will increase friction. According to the manufacturer's recommendations, properly lubricate the inside of the actuator.
3. Air leakage: There is a leak in the air system, resulting in insufficient pressure. Check the air system, find and repair the leak.
4. Piston seal damage: Damage to the seal ring causes gas leakage. Check and replace the piston seal.
III. Unstable or jittery action
1. Air source fluctuation: Unstable air source pressure will cause unstable actuator action. Ensure that the air source pressure is stable and install voltage stabilizing equipment if necessary.
2. Control signal interference: The solenoid valve or control system signal is interfered with. Check and ensure that the control signal is not interfered with, and install shielding equipment if necessary.
3. Internal wear of the actuator: Wear of internal mechanical parts causes unstable action. Disassemble the actuator, check and replace the worn parts.
IV. Actuator leakage
1. Loose joints: Loose or damaged joints of the air source pipeline will cause leakage. Check and tighten all joints, and replace damaged joints if necessary.
2. Aging of the seal ring: Aging or damage of the seal ring is a common cause of air leakage. Check and replace the aged or damaged seal ring.
3. Damage to the actuator housing: Cracks or damage to the housing can cause air leakage. Check the housing and repair or replace the cracked or damaged parts.
5. The actuator cannot return to its original position
1. Damage to the spring: Damage or failure of the return spring will hinder the return of the actuator. Check the spring and replace it if necessary.
2. Internal jamming: The internal mechanical parts are jammed. Disassemble the actuator, check and clean the jammed parts to ensure that it operates normally.
3. Continuous control signal: The control system continuously outputs signals and the actuator cannot return to its original position. Check the control system to ensure that the signal is normal and will not be continuously output.