Development process of regulating valve

1920s: The original regulating valve for steady 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 the new type of regulating valve was further produced. Diaphragm valves , pneumatic angle seat valves , butterfly valves , ball valves , etc. 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%.

In the 1990s: the focus of the 1990s was on the research, improvement, and improvement of reliability and special difficult products. By the end of the 1990s, the tenth structure of the product - a full-featured ultra-light valve - was introduced. Its outstanding feature is the breakthrough in reliability, function and weight. Functional breakthrough - the only full-featured product, so that a product can be replaced by a number of functionally incomplete products, simplifying the selection, simplifying use, and simplifying the variety.