1.The media is dirty or there is external impurities entering. If so, the solid particle polluter will crash the minimum pressure valve violently and make the parts have a damage. 

2.The gas-liquid separator in the air compressor has a failure. This will have an crash on the minimum pressure valve. The minimum pressure valve can not accelerate normally because of  bearing the extra crash. The major performance is that there is abnormal sound during the work.

3.there is too much lubricating oil in the cylinder. The excess lubricating oil forms the oil sticky in the minimum pressure valve. This will result in the valve block’s fracture  because of the delayed close or open.

4.The generating set resonant vibration、misoperation、environmental factors and other reasons  will also have an impact on the service life of the minimum pressure valve.