The small-sized pneumatic O-type ball valve is manufactured by the introduction of Japanese technology 301K O-type ball valve with 63000RA series of small-angle trip pneumatic actuator. It uses compressed air as the driving force, and the club drives the ball to rotate 90 degrees to realize full-open and full-close action. Seat forms: T, F, C type. Its supporting the use of accessories are air filter valve, limit switch, solenoid valve. One of the main role of air filter valve is: stable pressure, filter impurities in the air and water vapor. The valve is often used for a certain time failure is leakage. Here's a brief introduction of the common fault of the ball valve and the corresponding maintenance methods. Pneumatic O-type ball valve leak, the common are the following: 1. Leakage of the upper and lower cylinder, which is due to the actuator and the seal of the cylinder due to the frequent activities of its implementing agencies did not achieve the sealing effect. 2. Leakage of the exhaust hole of the cylinder, which is due to the aging of the sealing ring at the seal between the two moving parts inside the cylinder and the cylinder. 3. Leakage of the solenoid valve on the cylinder may be due to overpressure in the pressure relief valve. 4. In addition to the above three cases, there is another case may also make the cylinder leakage, that is, the spring in the cylinder damage, due to the force is not in place, which may also cause the switch is not in place. Corresponding pneumatic O-ball valve leakage solution: 1. Replace the seal of the actuator. 2. Replace the seal at the cylinder. 3. The pressure regulator valve is adjusted to 3-5 kg, or the lower part of the solenoid valve open the aeration action several times, and sometimes may also be replaced solenoid valve. 4. Replace the spring in the cylinder. To solve the problem of cylinder leakage must be based on the actual situation to consider, for example, the valve is open, or off the air. For gas-open valve, first of all, you can close the hand valve at both ends, and then let the central control to open the valve, the first connection at the connecting piece open, and then the gas source cut off, this time the pressure relief valve gas Off, pay attention to when the executing agency will turn 90 ℃, after the last change must pay attention to the implementing agency moved back to its original position.