The development of the regulating valve

The development of the regulating valve

The development of regulating valves has been seven or eighty years since the beginning of the 20th century. Ten major types of regulating valve products, self-operated valves and positioners have been produced. The development process is as follows:

1920s: The original regulating valve for stable pressure was introduced.

In the 1930s, a two-seat valve and a single-seat valve with a "V" notch were introduced.

In the 1940s, the positioner appeared, and a new type of regulating valve was further produced. Diaphragm valves, pneumatic angle seat valves, butterfly valves, ball valves, and the like appeared.

In the 1950s: the ball valve was greatly promoted and used, and the three-way valve replaced the two single-seat valves into the system.

60's: There is a complete series of products in China. Now we are still using a large number of single seat valves, double seat valves, angle seat valves, three-way valves, diaphragm valves, butterfly valves, ball valves, seven products are still the level of the sixties. At this time, foreign countries began to introduce the eighth structural regulating valve - the sleeve valve.

70's: Another new structure of the product - the eccentric rotary valve came out (the ninth type of structure of the control valve variety). The sleeve valve has been widely used abroad during this period. In the late 1970s, the domestic joint design of the sleeve valve enabled China to have its own series of sleeve valves.

In the 1980s: In the early 1980s, due to reform and opening up, China successfully introduced petrochemical plants and regulating valve technology, which made the sleeve valve and eccentric rotary valve popularized, especially the sleeve valve, which greatly replaced the trend of single and double seat valves. It is used more and more widely. In the late 1980s, another major advancement of the regulating valve was the Japanese Cv3000 and the fine-sized regulating valve. In terms of structure, the single-spring pneumatic diaphragm actuator was changed to a multi-spring diaphragm actuator. The structure of the valve was only improved, not changed. . Its outstanding feature is to reduce the weight and height of the regulating valve by 30% and the flow coefficient by 30%.