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Ball valves are divided into: floating ball valve, fixed ball valve, track ball valve, V ball valve, three-way ball valve, stainless steel ball valve, forged steel ball valve, ash 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, the ball valve can be divided into shared by Stainless Steel Hollow Ball Manufacturer:
1. Metal material valves: such as carbon steel valves, alloy steel valves, stainless steel valves, cast iron valves, titanium alloy valves, Monel valves, copper alloy valves, aluminum alloy valves, lead alloy valves, etc.
2. Metal valve body lining valve: such as rubber-lined valve, lining fluorine valve, lining lead valve, lining plastic valve, lining enamel valve.
3. Non-metallic material valves: such as ceramic valves, glass valves, plastic valves.
According to the connection method, it can be divided into: thread ball valve, flange ball valve and plate ball valve.
There are many manufacturers of ball valves in China, and the connection sizes are mostly not uniform.
General class based on GB/T 12221-2005 "metal valve structure length".
Most domestic ball valve manufacturers are designed and produced according to this standard. However, this standard is not perfect, the specifications are not complete, the maximum nominal diameter of the floating ball valve is DN1200, and the maximum nominal diameter of the fixed ball valve is DN2000. According to the specifications of the valves produced by the factory and the information obtained, the nominal diameter of the floating ball valve is DN6, and the nominal diameter of the fixed ball valve is DN50. According to the research, the connection size of each manufacturer is not uniform. In order to have a unified standard, the user can exchange the same specifications during the selection and installation. It is recommended that the National General Machinery Research Institute GB/T 12221-2005 "Metal Valve Structure Length" Make revisions. It is recommended that the design institute and users choose according to the standard, and the ball valve manufacturer designs and manufactures according to the standard.
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