Industry new

Brief introduction to the development history of ball valve

The development of the ball valve on the historical track is as follows:
The advent of the ball valve was after the Second World War. Although its invention dates back to the early 20th century, this structural patent failed to complete its commercialization steps due to limitations of the material industry and the mechanical processing industry.
Until 1943, DuPont of the United States invented a polymer material polyvinyl fluoride (PTFE) plastic, which has sufficient tensile and compressive strength, certain elastoplasticity, good self-lubricating properties, and excellent Corrosion resistance, very suitable as a sealing material, can obtain a very reliable sealing effect. On the other hand, due to the advancement of the ball and the ball mill, the ball with high roundness and surface finish can be processed as the opening and closing member of the ball valve.
In this way, a new type of full-diameter, 90° angular-stroke valve enters the valve market, which has attracted widespread attention and gradually replaced traditional valve product shut-off valves, gate valves, plug valves and butterfly valves, and has continuously expanded its application fields. From small diameter to large diameter, from low pressure to high pressure, from normal temperature to high temperature to low temperature.
At present, the maximum diameter of the ball valve has been developed to 60in, the highest pressure level is 4500 pounds, the lowest temperature can reach liquid hydrogen temperature -25 ° C, the highest temperature can reach 850-900 ° C, suitable for various media and gas-solid, liquid - Solid two-phase flow has become the most promising type of valve.

PREVIOUS：Application advantages of intelligent valve pNEXT：What fields can be applied to pneumatic compo