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The Working Principle Of Cast Steel Ball Valve
- Jun 01, 2017 -

A ball valve driven by a stem and pivoted about the axis of the stem. Mainly used for cutting off or connected to the pipeline in the medium, can also be used for fluid regulation and control, which hard sealed V-ball valve V-shaped core and surfacing carbide alloy metal seat between the strong shear Cutting force, especially for fiber, micro-solid particles and other media. Cast steel ball valve is generally divided into handle cast steel ball valve, pneumatic cast steel ball valve, electric cast steel ball valve, cast iron ball valve, stainless steel ball valve, copper ball valve.

Cast steel ball valve in the 20th century, 50 years, with the rapid development of science and technology, production technology and product structure of the continuous improvement in a short period of 40 years, has rapidly developed into a major valve class. In the western countries of industrial countries, the use of ball valves is increasing year by year, in China, the ball valve is widely used in oil refining, long-distance pipeline, chemical, paper, pharmaceutical, water, electricity, municipal, steel and other industries, In the national economy occupies a pivotal position. The ball valve only need to rotate 90 degrees of operation and a small turning torque can be closed tight. The fully equal body cavity provides a very small, straight passage for the medium. It is generally believed that the ball valve is most suitable for direct opening and closing use, but the recent development of the ball valve has been designed so that it has a throttle and control the flow of use. The main features of the ball valve itself is compact, easy to operate and repair, suitable for water, solvents, acids and natural gas and other general working medium, but also for poor working conditions of the media, such as oxygen hydrogen peroxide, methane and ethylene. Ball valve body can be the whole, it can be modular.

Cast steel ball valve works by rotating the valve to make the valve open or closed. Ball valve switch light, small size, can be made into a large caliber, sealed and reliable, simple structure, easy maintenance, sealing surface and the spherical often closed state, not easily eroded by the media, in various industries have been widely used.

Ball valves and plug valves are of the same type of valve, only its closure is a sphere, the sphere around the center of the valve body to rotate to achieve the opening, closing a valve.

Implementation of standards

1), product standards

<< API6D Pipeline Ball Valve >> 2008 Standard

<< API607 ball valve anti - static standard >> - 2005

"Universal valve flanges and butt welded steel ball valves" GB / T12237-89

"Iron and copper ball valves" GB / T 15185-1994

"Steel valves are generally required" GB / T 12224-2005

"Drinking water transmission and distribution equipment and protective materials, safety evaluation criteria" GB / T 17219-1998