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Common Fault Judgment and Treatment of Pneumatic Ball Valve


Release time:

2021-08-02

Pneumatic ball valve is powered by compressed air, soPneumatic ball valveIn the process of application, air leakage is often present. take a look at below pneumatic ball valve air leakage way what are the bar.

Common Fault Judgment and Treatment of Pneumatic Ball Valve

Pneumatic ball valve is powered by compressed air, soPneumatic ball valveIn the process of application, air leakage is often present. take a look at below pneumatic ball valve air leakage way what are the bar.
1. check the air source processing equipment, check whether the filter, pressure reducing valve and oil mist device are normal, and observe whether the pressure is 3-8kg; the signal line of the pneumatic ball valve consists of a pair of control signal lines and a pair of reaction signal lines. When the PLC gives a signal to the valve, the signal is converted in the positioner of the regulating valve, and the valve stem action is controlled by the air source pressure. The stroke of the valve stem transmits the opening of the valve through the reaction signal of the regulating valve. If the pneumatic valve does not respond to the signal, perhaps the line is in addition to the problem, use a multimeter to check the signal line connected to the electricity. For example, check whether each contact has voltage, whether the line connection is correct, whether the signal line is damaged, whether the signal line is loose, etc.
2. observe whether the pneumatic actuator leaks, especially at the joint of the valve stem and the two end caps;
1. The cylinder exhaust hole leaks because the two movable parts inside the cylinder and the sealing ring of the cylinder body are aging.
2. The upper and lower parts of the cylinder are leaking because of the frequent activities of the sealing ring between the actuator and the cylinder and the actuator without reaching the sealing effect.
3. The solenoid valve on the cylinder leaks, perhaps because the pressure relief valve is too high.
4. The tension spring in the cylinder is damaged, the forming force is not in place, and then the cylinder leaks.
3. check whether the solenoid valve is working properly and whether there is air leakage;
4. check whether the locator is working properly, with or without air leakage; pneumatic ball valve can not be closed to zero, there may be two reasons. First, it is actually closed to zero, but the response indication is not available. This should be a signal problem and can be handled by adjusting the positioner. Second, it is true that it is not tightly closed. The big one may be that the valve sealing gasket is damaged, or that the valve stem joint is blocked by rolling. This kind of problem needs to remove the valve body and contact the pneumatic valve manufacturer to replace the sealing gasket and add lubricating oil to the rolling place to make it work normally.