Forecast and analysis of the development prospect of well-known pneumatic wafer type rubber lined butterfly valve industry? The pneumatic ball valve is mainly used in the flow pipeline for quick cutting off, distributing and changing the medium. The structure of pneumatic ball valve mainly has two types of structures: O type and V type ball core. The O type ball valve core is a floating precision casting, with the same diameter as the pipeline port, which is mainly used as a cut-off switch; The other is V-shaped ball core, which adopts a fixed structure, with V-shaped notch on the ball core. After the positioner is installed on the actuator, the proportion of fiber and granular media can be adjusted.
Pneumatic butterfly valve mainly refers to a spiral bellows; The other is annular bellows.
4. Spiral corrugated pipe is a pipe shaped shell with spirally arranged corrugations. There is a spiral rising angle between two adjacent corrugations, and all corrugations can be connected through a spiral line.
5. The annular bellows is a tubular shell with closed circular corrugations. The waves are connected in series with circular corrugations. The annular corrugated pipe is formed by seamless pipe or welding. Due to the limitation of processing method, the length of single tube is usually shorter than that of spiral bellows. The advantages of annular bellows are good elasticity and small rigidity.
