The three piece pneumatic ball valve is composed of a pneumatic actuator and a three piece ball valve. The pneumatic actuator of the steam control valve is relatively fast and does not require workers to do it themselves, which saves human resources and time to a large extent. Pneumatic three piece ball valve is widely used in water, solvent, natural gas and other general working media, but also for media with poor working conditions, such as oxygen, hydrogen peroxide, methane and ethylene.

Method 4: adding filler method; Usually, the number of sealing gaskets is simply increased in the form of double-layer or multi-layer mixed packing. For example, three gaskets are increased to five gaskets to improve the sealing performance of the valve stem. However, the leakage prevention effect of pneumatic control valve is not very obvious.