Main features of valve
The main characteristics of valve itself is compact, reliable sealing, simple structure, easy maintenance, regular spherical surface and seal in the closed state, the media can not easily be eroded, easy operation and maintenance for water, solvents, acids, and natural gas and other general work media, but also for working conditions of media, such as oxygen, hydrogen peroxide, methane and ethylene, etc., in various sectors has been widely used. Ball valve can be the whole, it can be modular.
Ball has simple structure, good sealing performance, but also in a certain range of nominal diameter smaller, light weight, less material consumption, installation of small size, and the drive torque is small, easy to operate, easy to open and close fast in recent Over the past decade one of the fastest-growing varieties of valves. Ball cock evolved from its opening and closing parts as a sphere, the use of the sphere around the stem axis 90 ° rotation to achieve the purpose of opening and closing. Valve in the pipe is mainly used for cutting, distribution and changing the direction of media flow, designed in a V-shaped opening of the ball also has good flow regulation.
Especially in the United States, Japan, Germany, France, Italy, Spain, Britain and other industrialized countries, the ball valve is widely used, the use of the variety and quantity continues to expand, and to high temperature, high pressure, big mouth, high tightness, long-life, excellent performance and a regulating valve multi-direction, its reliability, and other performance indicators have reached a higher level, and has been partially replaced by gate valves, globe valves, throttle valves. With the ball advances in technology, in the foreseeable short time, especially in the oil and gas pipelines, oil refining and nuclear industry on a cracker will have a wider application. In addition, other industry in the medium and large-caliber, low pressure area will also become the leading ball valve types.