Regulating valve growth since the beginning of the 20th century has been 80 years of history, has bred ten categories of regulating valve products, independent valve and positioner, regulating valve and control valve on the process as follows:

May 20: The original control valve for steady pressure was introduced.
 
30 May: To "V" notch of the two-seat valve and single seat valve as the representative product of the V-shaped ball valve.
 
40 years: The emergence of positioner, new varieties of regulating valves are further bred, the appearance of estranged valves, Angle valves, butterfly valves, ball valves, etc.

Ball valves were widely used, and three-way valves replaced two single-seat valves into the system.
 
June 60: A complete series of products was produced in China only after a series of innovation plans, scales and examples were carried out for the above products. Now we are still in the use of a large number of single-seat valve, two-seat valve, Angle valve, three-way valve, barrier valve, butterfly valve, ball valve seven products are still 60 years of the product. At this time, overseas began to launch the eighth kind of layout control valve - sleeve valve.
 
July 70: Another product of a new layout, the preferred rotary valve (the ninth category of the layout of the regulator variety). This period of the sleeve valve is widely used overseas. At the end of 1970, Domestic Unity planned sleeve valves, which made China have its own product line of sleeve valves.
 
1980: During the period of innovation and opening up, China Lecheng introduced the stone dressing device and regulating valve skills, so that the sleeve valve and preferential rotary valve have been popularized and utilized. In particular, the sleeve valve has the potential to replace the single and double seat valve, and it is used more and more widely. At the end of 80 years, regulating valve and a large hope this Cv3000 and fine small regulating valve, they in layout, the single spring pneumatic film implementation mechanism to multi-spring film implementation mechanism, valve layout is just innovation, not change. Its outstanding characteristic is to make the weight and height of the control valve fall 30%, the flow coefficient progress 30%.

90 years: 90 years of control valve focus on reliability, especially difficult products, innovation, progress. By the end of 1990, Waring had introduced a tenth layout, the all-function ultralight valve. It is characterized by a breakthrough in reliability, efficiency and weight. Efficiency breakthrough - the only product with full efficacy, therefore, can be replaced by a product on the extensive effect of the product is not complete, so that the selection of simplified, simplified use, simplified varieties; Breakthrough in weight - than the leading product of single-seat valve, two-seat valve, sleeve valve 70 ~ 80% light, than fine small valve also 40 ~ 50% light; Reliability breakthrough - for the traditional control valve and other factors, such as sealing reliability, positioning reliability, reliability of action. The advent of the product, so that China's control valve skills and application degree reached the end of the 90 years of the ancestral level; It is a huge breakthrough on the replacement valve; In particular, electronic super light valve with full effect will become the mainstream of regulating valves in the coming century.