There are two types of pneumatic ball valve structures. One is the O-ring, which is a floating precision casting with the same diameter of the flow port and pipe, and 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?

Problems in stainless steel pneumatic butterfly valve industry
1. The price cost is increasing day by day. As the most important raw material of stainless steel pneumatic butterfly valve consumption, steel has entered a period of low profit with open and transparent prices. The rising steel prices will promote the consumption cost of stainless steel pneumatic butterfly valves;
2. The brand of stainless steel pneumatic butterfly valve industry in China is poor, and the competitiveness in the international market is weak. Due to the low industrial concentration, backward technology and low price competition, there is no "famous brand" in the international sense in such a huge Chinese stainless steel pneumatic butterfly valve market;
3. The fierce competition has eliminated small and medium-sized stainless steel pneumatic butterfly valve enterprises from time to time.
4. The R&D strength is weak and the capital investment is insufficient. China's technological progress is still in the 1980s abroad. Although a large number of advanced technologies and consumer lines have been introduced, the digestion and absorption of technology lacks the basic support of software and hardware.
5. Brain drain of theoretical application technology. At present, although many colleges and universities in China are engaged in scientific research, and many theoretical discussions and patent papers are of a high degree, they are not closely separated from consumption theory, and the ability to transform theory into waste products is poor.