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The high pressure ball valve has the action of rotating 90 degrees, the cock body is a sphere, and there is a circular through hole or channel passing through its axis. The ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. It only needs to be rotated 90 degrees and a small torque can be closed tightly. The ball valve is most suitable for use as a switch and shut-off valve, but the recent development has designed the ball valve to make it have the purpose of throttling and controlling the flow, such as the V-shaped ball valve.
The main features of the high-pressure ball valve are its compact structure, reliable sealing, simple structure and convenient maintenance. Working medium, but also suitable for Chinese Accumulator Supplier medium with harsh working conditions, such as oxygen, hydrogen peroxide, methane and ethylene, etc., and are widely used in various industries. The ball valve body can be integral or combined.
Ball valves are divided into: floating ball valve, fixed ball valve, orbital ball valve, V-shaped ball valve, three-way ball valve, stainless steel ball valve, forged steel ball valve, ash discharge ball valve, anti-sulfur ball valve, three-way ball valve, pneumatic ball valve, electric ball valve, ferrule Ball valve, welded ball valve.
According to the shell/body material classification, ball valves can be divided into:
1. Metal material valve: such as carbon steel valve, alloy steel valve, stainless steel valve, cast iron valve, titanium alloy valve, Monel valve, copper alloy valve, aluminum alloy valve, lead alloy valve, etc.
2. Metal valve body lining valves: such as rubber-lined valves, fluorine-lined valves, lead-lined valves, plastic-lined valves, and enamel-lined valves.
3. Non-metallic material valve: such as ceramic valve, glass valve, plastic valve.
According to the connection method, it can be divided into: threaded ball valve, flange ball valve and plate ball valve.
There are many domestic manufacturers of ball valves, and most of the connection sizes are not uniform.
It is a general class based on GB/T 12221-2005 "Structural Length of Metal Valves".
Most domestic ball valve manufacturers are designed and produced according to this standard. However, this standard is not perfect, and the specifications are incomplete. The maximum nominal diameter of floating ball valve is DN1200, and the maximum nominal diameter of fixed ball valve is DN2000. According to the valve specifications produced by the factory and the information available, the minimum nominal diameter of the floating ball valve is DN6, and the minimum nominal diameter of the fixed ball valve is DN50. After research, the connection dimensions of various manufacturers are not uniform. In order to have a unified standard, users can exchange the same specifications during selection and installation. Make revisions. It is recommended that design institutes and users select according to the standard, and the ball valve manufacturer designs and manufactures according to the standard.
1. The fluid resistance is small, and the full-bore ball valve basically has no flow resistance.
2. Simple structure, small size and light weight.
3. Tight and reliable. It has two sealing surfaces, and the sealing surface materials of the ball valve are widely used in various plastics, which have good sealing performance and can achieve complete sealing. It has also been widely used in vacuum systems.
4. Easy to operate, open and close quickly, just rotate 90° from fully open to fully closed, which is convenient for long-distance control.
5. It is easy to maintain, the ball valve has a simple structure, the sealing ring is generally movable, and it is more convenient to disassemble and replace.
6. When fully open or fully closed, the sealing surfaces of the ball and the valve seat are isolated from the medium, and the sealing surface of the valve will not be eroded when the medium passes through.
7. Wide range of applications, diameters ranging from small to several millimeters, large to several meters, and can be applied from high vacuum to high pressure.
8. Since the ball valve has wiping properties during the opening and closing process, it can be used in media with suspended solid particles.
