The forging forming of the large diameter stop valve body was realized on small and medium-sized equipment, and the energy-saving and labor-saving characteristics of the shear extrusion forming process were verified. The body of large stop valve can be integrally forged on existing domestic equipment. In addition. The forging forming of tee pipe and other large branch parts can be studied by using the shear extrusion technology.

1、 Features of pneumatic pneumatic ball valve
1. Simple structure, small size and light weight.
2. The fluid resistance is small, and its resistance coefficient is equal to that of pipe sections with the same length.
3. It is easy to operate and can be opened and closed quickly. It only needs to rotate 90 ° from full opening to full closing, which is convenient for remote control.
4. Tight and reliable, the sealing surface material of pneumatic ball valve is widely used in plastic, with good sealing performance. It has also been widely used in vacuum systems.
5. It is easy to maintain, the pneumatic pneumatic ball valve is simple in structure, the sealing ring is generally movable, and it is easy to remove and replace.
6. When the valve is fully opened or closed, the sealing surfaces of the ball and valve seat are isolated from the medium. When the medium passes through, it will not cause erosion of the sealing surface of the pneumatic ball valve.
7. It has a wide range of applications, ranging from a few millimeters to several meters in diameter, from high vacuum to high pressure.
8. Because the power source of pneumatic pneumatic ball valve is gas, generally 0.2-0.8MPa, which is relatively safe. If the pneumatic pneumatic ball valve leaks, compared with the hydraulic and electric valves, the gas can be discharged directly, which does not pollute the environment and has high safety.
9. Compared with manual and turbine rotating pneumatic ball valves, pneumatic pneumatic ball valves can be configured with large caliber. Manual and turbine rotating pneumatic ball valves are generally below DN300 caliber, and pneumatic pneumatic ball valves can reach DN1200 caliber. As the pneumatic pneumatic ball valve is widely used in petroleum, chemical industry, power generation, paper making, atomic energy, aviation, rocket and other departments, as well as people's daily life. It has become the work of many experts and scholars to accelerate the research on pneumatic pneumatic ball valves. It is believed that pneumatic pneumatic ball valves will become more satisfactory products in the future.