What Causes Air Leakage in A Pneumatic Solenoid Valve, And How To Solve It

Sep 01, 2025

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The reasons for the leakage of the Pneumatic Solenoid Valve of the air compressor

1. When the air compressor is in continuous operation, if the body temperature is too high or the indoor temperature is too high, the solenoid valve coil may burn out or the wire may break.

2. When the solenoid valve of the air compressor is frequently started and stopped, it will cause damage to the internal pilot head.

Solutions for air compressor motor solenoid valve leakage:

1. The solenoid valve should be replaced in a timely manner, and measures for indoor cooling should be taken.

2. The pilot head or solenoid valve should be replaced in a timely manner.

3. First, release the gas inside the air compressor's air storage tank and set the pressure to zero. Then, unscrew the corresponding hexagonal cover of the check valve and check if there are any iron filings stuck on the internal valve core. If so, remove the iron filings in time. Wipe the surface of the valve core with alcohol and reinstall it.

The reasons for the leakage of the magnetic pulse valve

1. The magnetic pulse valve is leaking air, and the diaphragm is damaged.

Solution: Close the valve of the pulse valve air distribution bag, open the pulse valve for inspection. If the diaphragm is damaged, it can be replaced.

2. There are impurities such as rust and welding slag between the gasket of the diaphragm and the end face of the air outlet, and the two cannot fit tightly, resulting in air leakage of the electromagnetic pulse valve.

Solution: Open the pulse valve and thoroughly remove any debris.

Note: During the installation of the pulse bag filter, first ventilate to clear the debris in the compressed air pipeline, and then install the pulse valve and the air distribution bag. This can effectively prevent the pulse valve from leaking due to blockage by debris.

3. For submerged pulse valves, if there is a leak in the jet pipe of the air tank, it will cause compressed air to directly enter the jet pipe and leak without passing through the pulse valve.

Solution: Just have a professional repair or replace the spray pipe in a timely manner.

What causes air leakage in an electromagnetic valve and how to solve it

The reasons for air leakage in the solenoid valve muffler

After the pneumatic solenoid valve, there is always a pneumatic actuator, such as a pneumatic cylinder, etc. The gas input into the solenoid valve is discharged through the cylinder and the valve's exhaust port. Here, to reduce noise, a muffler is installed. Intermittent exhaust, according to the frequency during operation, is a normal phenomenon. If the pneumatic system is not working or is constantly venting, there are the following situations:

The sealing ring on the piston ring in the pneumatic cylinder is worn or damaged, or broken, causing the intake chamber of the cylinder to "cross-flow" into the exhaust chamber (without separating the two chambers), and the gas continuously flows out of the other chamber; that is, the muffler is constantly leaking air.

2. There are problems with installation and electrical control. This situation can also occur if the air inlet and outlet ports of the solenoid valve are connected in reverse (generally, P is the air inlet and A or B is the air outlet). Another issue is the abnormal opening of the control circuit. For instance, the actuator controlled by the solenoid valve is a pneumatic vacuum generator unit. Before it starts working, the circuit keeps it in an open state to evacuate the air, and the exhaust is continuous.

3. Internal faults of the solenoid valve prevent the valve core from moving completely in place, causing the air intake port inside the valve to "mix" with the exhaust port and be discharged from the muffler. However, in this case, the cylinder often cannot work normally.

 

Above is what causes air leakage in a Pneumatic Solenoid Valve, and how to solve it. To learn more related information are available https://www.joosungauto.com/.

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