Pneumatic O-ring ball valve structure:
A ball with a middle through hole is installed inside the valve body, and a through hole with a diameter equal to the pipe diameter is opened on the ball. The ball can rotate in the seal seat, and there is a ring elastomer on both sides of the pipe direction to achieve sealing. By rotating the ball 90 °, the direction of the through hole can be changed, thus realizing the opening and closing of the ball valve. The valve core (ball) is spherical. From the structural point of view, the ball valve seat is embedded on the valve body side valve seat when sealing. The relative moving parts are all made of self-lubricating materials with very small friction coefficient, so the operating torque is small. In addition, the long-term sealing of sealing grease makes the operation more flexible. It is generally used for two position regulation, and the flow characteristic is quick opening.

Precautions for welding of pneumatic butterfly valve
In today's life, composite pipe is a kind of common construction material, which is often used in the welding process. In the welding process, it is required to take corresponding measures to stop welding, so that the pneumatic butterfly valve can be used normally in the operation process, to prevent the damage of welding spots, and to prevent the phenomenon that the pneumatic butterfly valve cannot be used normally
In the welding process, we only need to control the key points of welding to achieve the best welding effect. In the welding process, it is mainly used for the welding of argon arc welding motors, and completes the high-frequency and motor through pulse installation. The use of this motor can improve the efficiency of composite pipes
During the welding process, the two ends of the clad pipe need to be worn so that it can be welded normally during operation. Due to the damage of the joint point during the welding process, it cannot be used normally
Low voltage and low current are required during welding to improve the welding effect after welding, prevent damage during welding and improve the integrity of welding scar
After welding, it is required to stop polishing the solder joints to improve the integrity of the solder joints. During the grinding process, many methods can be used for grinding. Depending on the location, the polishing effect is different, and it is required to stop polishing according to the location
In the process of welding pneumatic butterfly valves, the main method is to stop welding by using the above method, which can improve the welding effect and prevent the damage caused by incomplete welding points during operation