5 Conclusion High temperature and high pressure metal seat pneumatic ball valve is an energy saving and consumption reducing product that we focus on organizing and developing. After the product is applied locally, there is still much room for promotion. In addition to the advantages of R&D conditions, there is also an important advantage, that is, its convenient industrial test conditions can be repeatedly tested on the operating unit. At present, a large amount of data has been obtained, and a small number of samples have begun to conduct experiments. The experiment shows that the project can be used for the ultra supercritical steam turbine generator unit boiler, steam turbine body and pipeline drainage system, reaching the same level as imported products from western countries, and can replace imported products, with huge energy saving value.

1、 Features of pull rod welded pneumatic ball valve
1. The valve body structure is integrally welded, without external leakage.
2. The valve seat is composed of PTFE sealing ring and spring, which has strong adaptability to pressure and temperature changes, and will not produce any leakage within the scope of use.
3. The anti leakage structure of the valve rod, the bottom of the valve rod has one PTFE self sealing gasket and one O-ring, and the top is composed of two O-ring and two PTFE gaskets to ensure no leakage.
4. The valve body is made of the same material as the pipeline, so there will be no uneven stress, nor will it be squeezed and deformed due to earthquake and when the vehicle passes the ground.
5. The valve body is light and easy to keep warm.
6. The directly buried pneumatic ball valve can be directly buried underground, instead of building a high atmospheric dynamic ball valve well, it only needs to set a small shallow well on the ground, which greatly saves construction costs and project time.
7. The length of the valve body and the height of the valve stem can be adjusted according to the construction and design requirements of the pipeline. The pull rod welded pneumatic ball valve is a very competitive product both in terms of performance characteristics and function value. Because the pull rod welded pneumatic ball valve can be directly buried underground, it does not need to build a high air operated ball valve well to reduce project cost, and it can also avoid personal injury when operating the pneumatic ball valve. The welded pneumatic ball valve can operate reliably for a long time, Under the condition of normal operation of pneumatic ball valve, the warranty period is 20 years. Maybe its development will be more unexpected in the future.