With the rapid development of the coal industry, China's coal seam mining technology has reached the international advanced level, pneumatic hard seal ball valves are one of the indispensable high-volume components in the hydraulic system of coal mine. The performance of the pneumatic hard seal ball valve directly affects the performance of the entire hydraulic system of mining equipment, the pneumatic hard seal ball valve is used with good performance, and can repair the fault. Failure will directly affect the action of the switching valve and regulating valve. Yizhong valve reminds us that the common fault is the pneumatic hard seal ball valve does not move. Troubleshooting should be carried out from the following aspects:

NO1：burnt out coil

The wiring of the pneumatic hard seal ball valve can be removed and measured with a multimeter. Pneumatic hard seal ball valve if there is an open circuit, the coil will burn out, due to the coil moisture, resulting in magnetic leakage, resulting in excessive coil current and damage, therefore, to prevent rainwater from entering the pneumatic hard seal ball valve, spring is too hard, lateral force is too large, the coil turns are too small, insufficient suction will damage the coil, in case of emergency, you can normally operate the manual button on the coil to open the valve.

NO2 :Slide valve sleeve stuck

Pneumatic hard seal ball valve slide valve sleeve and spool clearance is small. It is usually assembled as a whole. When there are mechanical impurities or smooth oil is too little, it is easy to jam, you can poke the steel wire through the small hole to make it pop back, the solution is to remove the pneumatic hard seal ball valve, take out the spool and spool sleeve, clean it with water, make the spool lubricated in the spool sleeve.

NO3:leak air or gas

Air leakage will result in insufficient pressure and will cause difficulty in opening and closing the pneumatic hard seal ball valve. This is due to damage to the gasket or wear of the slide valve, causing multiple chambers to run out of air. When the pneumatic hard seal ball valve of the switching system malfunctions, it should be repaired at the appropriate time when the pneumatic hard seal ball valve is disconnected from the power supply. If the repair is not good within the switching gap, you can stop the switching system and calmly carry out the repair.

    Coil burnout, slide valve sleeve jamming, and air leakage are the three most common failures of pneumatic hard seal ball valves. Through the above introduction, if you encounter these three situations, you can quickly repair the pneumatic hard seal ball valve. Of course, if you encounter other difficult problems, you should find a reputable pneumatic hard seal ball valve repair manufacturer to repair, to ensure that the fault can be successfully repaired.