The ball valve (ball valve), the opening and closing (ball) is driven by the stem and revolves around the axis of the ball valve. It can also be used for the regulation and control of fluid. The hard sealing V ball valve has strong shearing force between its V core and the metal valve seat of hardfacing hard alloy. It is especially suitable for medium containing fibers and tiny solid particles. Switch and multi way valve in the pipeline not only can flow, and flow diversion, flexible control of the medium, but also to turn off any channel to the other two channels. This type of valve should generally be installed horizontally in the pipe.
The ball valve came into being in 1950s. With the rapid development of science and technology, the improvement of production technology and product structure has rapidly developed into a main valve type in just 40 years. In the developed countries in the west, the use of ball valves is increasing year by year.
In China, ball valves are widely used in petroleum refining, long-distance pipeline, chemical industry, papermaking, pharmaceutical, water conservancy, power, municipal, steel and other industries, and play a decisive role in the national economy. It has 90 degrees of rotation, the cock body is a ball, with a circular hole or passage through its axis.
The ball valve is mainly used for cutting, distributing and changing the direction of flow in the pipeline. It only needs to rotate 90 degree operation and small moment of rotation to close. The ball valve is the most suitable for the switch, the use of the shut-off valve, the V ball valve. Besides the attention to the pipeline parameters, the electric valve should pay special attention to its environmental conditions. Because the electric device in the electric valve is an electromechanical device, its usage state is greatly influenced by its usage environment.