The main faults of the pneumatic valve are poor operation and leakage, which are mainly caused by such factors as condensate, dust, rust, poor lubrication, unqualified seal products, etc. in the compressed air. How to eliminate the fault phenomenon in the sealing element of pneumatic valve, Baivalve tells you to list various troubleshooting methods according to different fault causes as follows.

What are the reasons why the valve seals cannot be reversed?
1. Poor lubrication, large sliding resistance and starting friction;
2. The movement and compression of the sealing element are large, or the sealing element expands and deforms;
3. Dust or oil stain is stuck on the valve seat;
4. The spring seals are damaged or stuck;
5. The area of control piston is small, and the operating force is low;

[Exclusion method]
1. Improve the lubrication degree;
2. Properly reduce the compression of the seal;
3. Remove dust and oil stain;
4. Reassemble or replace the spring;
5. Increase the piston area or operating force.

What is the cause of leakage at the valve sealing position?
1. Seal compression is too small or damaged;
2. The valve rod or valve seat is damaged;
3. The casting has shrinkage cavity;
4. Damaged buffer seal

[Exclusion method]
1. Increase the compression amount appropriately, and replace the seal products;
2. Replace the valve stem and valve seat;
3. Replace the casting;
4. Replace the seals;

What causes the vibration inside the valve seal?
1. Low pressure;
2. Low voltage;

[Exclusion method]
1. Increase the pilot operating pressure;
2. Increase the power supply voltage or change the coil parameters.