The pneumatic ball valve of the filling machine has the characteristics of small unbalanced force, good dynamic stability, small pressure drop loss, high adjustment accuracy, low noise, air defense, etc. Compared with P series straight through single seat regulating valve, it can accept higher differential pressure, and has a wider use temperature scale than G series cage type single seat regulating valve. Pneumatic and electric actuators can be used according to the requirements of working conditions. The whole machine is stable, flexible, adjustable, and easy to protect. It can be used to control fluids under different working conditions and get used to various severe working conditions. It is widely used in petroleum, chemical industry, electric power, textile, paper making and other professions, especially in the operation occasions where the pressure difference before and after the valve is large and the leakage requirement is not very high.

Therefore, unlike the existing technology, the utility model is not installed on the valve plate with soft and hard multi-layer sealing rings, but directly installed on the valve body. Adding an adjusting ring between the pressing plate and the valve seat is a very ideal two-way hard sealing mode. It can replace gate valve, globe valve and ball valve. Butterfly valve is suitable for flow regulation. Since the pressure loss of butterfly valve in the pipeline is relatively large, about three times that of gate valve, when selecting butterfly valve, the impact of pressure loss on the pipeline system should be fully considered, and the solidity of butterfly plate to withstand pipeline medium pressure when closing should also be considered. In addition, consideration must be given to the limits of the operating temperature of the resilient seat material at high temperatures.