Ball valve is evolved from the plug valve, its opening and closing part is a ball, using the ball to rotate 90 degrees around the axis of the valve stem to achieve the purpose of opening and closing
What is the role of the ball valve
Ball valve in the pipeline is mainly used to cut off, distribute and change the direction of the flow of the medium, designed into the V-shaped opening ball valve also has a good flow regulation function.
Ball valves can be integral or combined. The main characteristics of the ball valve are its compact structure, reliable sealing, simple structure, convenient maintenance, sealing surface and spherical surface are often in a closed state, not easy to be corroded by the medium, easy to operate and maintain, suitable for water, solvents, acids and natural gas and other general working media, but also suitable for poor working conditions of the medium, such as oxygen, hydrogen peroxide, methane and ethylene, etc. It is widely used in various industries. Especially in the industrial developed countries, the use of ball valves is very wide, the variety and number of use is still continuing to expand, and to high temperature, high pressure, large caliber, high tightness, long life, excellent adjustment performance and a valve multi-function direction, its reliability and other performance indicators have reached a high level, and has partially replaced gate valves, globe valves, regulating valves.
With the technological progress of ball valves, it will be more widely used in the foreseeable short time, especially in oil and gas pipelines, oil refining cracking units and the nuclear industry. In addition, in other industries of large and medium-sized caliber, medium and low pressure fields, ball valves will also become one of the leading valve types.
Parameter level of ball valve
1, nominal pressure or pressure level: PN1.0-32.0MPa, ANSI CLASS 150-900, JIS10-20K
2, nominal diameter or caliber: DN6-900, NPS 1/4~36
3, connection mode: flange, butt welding, thread, socket welding, etc
4, applicable temperature: -196℃~540℃
5, driving mode: manual, worm gear transmission, pneumatic, electric, hydraulic, gas-liquid linkage, electro-hydraulic linkage
6, valve body material: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8(304), CF3(304L), CF8M(316), CF3M(316L), Ti. Choose different materials, can be used for water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea and other media.