What are the occasion for the stainless steel ball valves?

Through the previous article, we learned the basics of stainless steel ball valves, but do you know the application of stainless steel ball valves? Let's take a look.

Introduction of stainless steel ball valve

The stainless steel ball valve came out in the 1950s. With the rapid development of science and technology, the continuous improvement of production technology and product structure, in just 40 years, it has rapidly developed into a major valve category. In the developed western countries, the use of ball valves is increasing year by year.

In China, ball valves are widely used in petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmaceuticals, water conservancy, electric power, municipal administration, steel and other industries, and occupy a pivotal position in the national economy. It has the action of rotating 90 degrees, the cock body is a sphere, and has a circular through hole or channel through its axis.

The ball valve is mainly used to cut, distribute and change the flow direction of the medium in the pipeline. It only needs to be rotated by 90 degrees and can be closed tightly with a small torque. Ball valve is most suitable for on / off valve, V-type ball valve.

Application of stainless steel ball valve

Because ball valves usually use rubber, nylon, and polytetrafluoroethylene as the seat seal material, its temperature is limited by the seat seal material. The cut-off effect of the ball valve is completed by the metal ball pressed against the plastic valve seat under the action of the medium. Under certain contact pressure of the valve seat seal, elastic and plastic deformation occurs in some areas. This deformation can compensate the manufacturing precision and surface roughness of the ball and ensure the sealing performance of the ball valve.

And because the valve seat sealing ring of ball valve is usually made of plastic, so when choosing the structure and performance of the ball valve, we must consider the fire resistance and fire resistance of the ball valve, especially in petroleum, chemical, metallurgy and other sectors, in flammable and explosive media In the equipment and piping systems, ball valves should be used, and more attention should be paid to fire resistance and fire prevention.

Generally, in two-position adjustment, strict sealing performance, mud, wear, necking passage, rapid opening and closing action (1/4 turn opening and closing), high pressure cutoff (large pressure difference), low noise, cavitation and gasification, Ball valves are recommended for piping systems that leak to the atmosphere with a small amount of operating torque and low fluid resistance.

Ball valves are also suitable for piping systems of light construction, low pressure cut-off, and corrosive media. Ball valves can also be used in cryogenic installations and piping systems. In the oxygen piping system of the metallurgical industry, a ball valve that is strictly degreased is used. When oil pipelines and gas pipelines need to be buried underground, full-diameter welded ball valves are required.

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