Production of steam pneumatic diaphragm regulating valve

Steam pneumatic diaphragm regulating valveWATER

The development of pneumatic diaphragm regulating valves has a history of 80 years since the beginning of the 20th century, and has produced ten major categories of regulating valve products, including self operated valves and positioners. The development history of regulating valves and control valves is as follows:

In the 1920s, primitive regulating valves for stable pressure were introduced.

In the 1930s, V-type regulating ball valves were introduced, represented by double seat valves and single seat valves with "V" - shaped notches.

In the 1940s, positioners emerged and new varieties of regulating valves were further developed, including diaphragm valves, angle valves, butterfly valves, ball valves, etc.

In the 1950s, ball valves were widely promoted and used, and three-way valves replaced two single seat valves in the system.

In the 1960s, it was only after a series of improved designs, standardization, and normalization of the above-mentioned products in China that a complete series of products were developed. The seven products we still use in large quantities, including single seat valves, double seat valves, angle valves, three-way valves, diaphragm valves, butterfly valves, and ball valves, are still at the level of the 1960s. At this time, foreign countries began to introduce the eighth type of structural regulating valve - sleeve valve.

In the 1970s, another new structure of product - eccentric rotary valve was introduced (the ninth category of regulating valve varieties). During this period, sleeve valves were widely used abroad. In the late 1970s, China jointly designed sleeve valves, giving China its own series of sleeve valve products.

In the 1980s, during the reform and opening up period, China successfully introduced petrochemical equipment and regulating valve technology, which promoted the use of sleeve valves and eccentric rotary valves, especially sleeve valves, which had the potential to replace single and double seat valves and became increasingly widely used. In the late 1980s, another major development in regulating valves was Japan's Cv3000 and compact regulating valves. In terms of structure, they changed the single spring pneumatic diaphragm actuator to a multi spring diaphragm actuator, and the valve structure was only improved, not changed. Its prominent feature is to reduce the weight and height of the regulating valve by 30%, and increase the flow coefficient by 30%.

In the 1990s, the focus of regulating valves was on reliability and the development, improvement, and enhancement of special and difficult products. In the late 1990s, Hualin Company launched its tenth structural product - a fully functional ultra light valve. Its outstanding features are breakthroughs in reliability, functionality, and weight. Breakthrough in functionality - a product with full functionality, therefore, a single product can replace many products with incomplete functionality, simplifying selection, use, and variety; Breakthrough in weight -70-80% lighter than leading products such as single seat valves, double seat valves, and sleeve valves, and 40-50% lighter than precision small valves; Breakthrough in reliability - solves various unreliable factors such as sealing reliability, positioning reliability, and action reliability of traditional regulating valves. The introduction of this product has brought China's regulating valve technology and application level to the level of the late 1990s; It is a major breakthrough in regulating valves; Especially electronic fully functional ultra lightweight valves will become the mainstream of regulating valves in the next century.