What is a ball valve, functions and classifications of ball valves

Product introduction

Ball valve (ball valve) came out in the 50s of the 20th century, with the rapid development of science and technology, the continuous improvement of production technology and product structure, in just 40 years, has rapidly developed into a major valve. In the western industrially developed countries, the use of ball valves is rising year by year.

In China, ball valves are widely used in petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmaceutical, water conservancy, electric power, municipal, steel and other industries, and occupy a pivotal position in the national economy. It has an action of rotating 90 degrees, the stopcock is a sphere, and there are round through-holes or channels through its axis.

The ball valve is mainly used in the pipeline to cut, distribute and change the flow direction of the medium, it only needs to rotate 90 degrees of operation and a small turning torque to close tightly. Ball valve is most suitable for switching, shut-off valve, V-shaped ball valve. In addition to paying attention to pipeline parameters, electric valves should also pay special attention to the environmental conditions of their use, because the electric device in the electric valve is an electromechanical equipment, and its use state is greatly affected by its use environment. Under normal conditions, electric ball valves and butterfly valves should be used in the following environments.

peculiarity

1. Wear-resistant; Since the spool of the hard-sealed ball valve is alloy steel spray welded,

The sealing ring is alloy steel overlay welded, so the hard seal ball valve will not produce much wear when opening and closing. (It has a hardness factor of 65-70):

Second, the sealing performance is good; Since the sealing of the hard sealing ball valve is manually ground, it can not be used until the valve core and the sealing ring are completely matched. So his sealing performance is reliable.

Third, the switch is light; Since the bottom of the sealing ring of the hard-sealed ball valve adopts a spring to make the sealing ring and the spool hug tightly, the switch is very light when the external force exceeds the preload of the spring.

4. Long service life: It has been widely used in petroleum, chemical, power generation, papermaking, atomic energy, aviation, rockets and other departments, as well as people's daily life.