What is the development of the stainless steel ball valve?

In people's daily life, stainless steel ball valves will appear, but when did it start?

As early as the 1880s, the lack of proper sealing material in the United States limited the development of stainless steel ball valves, making it a formal industrial product. It was not until the 1950s that the emergence of elastic sealing materials such as PTFE caused a turn for its production and development; and because of the development of the machine tool industry, the processing technology of spheres was improved, and the dimensional accuracy required by the spheres could be achieved. Surface roughness.

At present, the largest nominal diameter has reached 3050mrn, a 4 billiard valve provided by a pumping station, used as a shut-off valve for the turbine outlet, the design pressure is 4.8MPa. The maximum working pressure of the ball valve has reached 72 MPa, and the corresponding temperature is up to 1000C.

Stainless steel ball valves are widely used not only in general industrial pipes, but also widely used in petroleum, chemical, power generation, aviation, rocket, paper, atomic energy and other sectors, and are widely used in liquid oxygen and liquid hydrogen pipelines in the nuclear industry and aerospace industry. use.

It is characterized by corrosion resistance, light weight and low cost. It is used more and more widely in waterways and chemical pipelines. The 6-inch plastic ball valve has high strength, excellent temperature and corrosion resistance, and the applicable temperature is less than 250 degrees.

Large diameter oil (or natural gas) lines are an important aspect of ball valve applications. Nominal diameter range: 600-1400mm, working pressure is usually 8.0MPa, in order to ensure safety, some manufacturers are in accordance with the characteristics of the use of pipeline ball valves and the natural conditions of the external ball, and the bending test and weathering resistance are comprehensive. Tests, tests to prevent fire spread, emergency cut-off tests, etc.