Classification and development history of pneumatic valves together

Pneumatic control valve is used to adjust in the field of industrial automation process control medium flow rate, pressure, temperature, liquid level, etc. The process parameters. According to the control signal of the automation system, the automatic pneumatic control valve opening, so as to realize the medium flow rate, pressure, temperature and liquid level of the regulation. The development of pneumatic control valve since the 20th century initial has been eighty years of history, has produced the ten kinds of pneumatic control valve products, self-reliance type valve and positioner, etc. Classification: 1. Pneumatic membrane pneumatic regulator is 2. Cylinder type pneumatic control valve 3. Tee pneumatic - valve 4. Angle of pneumatic control valve 5. Fluorine-butterfly pneumatic - valve 6. Self-reliance type pneumatic control valve development: 20 s: the stability of the original pneumatic control valve with pressure. S: with v-notch two-seater and single-seat valves for on behalf of the advent of v-type regulating ball valve products. 40 s: a locator, pneumatic control valve further produce new varieties, diaphragm valve, Angle valve, butterfly valve, ball valve, etc. Get bigger promotion use 50 s: ball valve, three-way valve to replace two single-block valve input system. In the '60 s: the series of improvements were made in China for the said goods design and standardization, standardization, domestic only has a complete series of products. Now we are in the extensive use of the single seat valve, two-seater valve, Angle valve, three-way valve, diaphragm valve, butterfly valve, ball valve, seven kinds of products is still in the 60 s level of products. At this time, foreigners start launched 8 kinds of pneumatic - valve structure & ndash; — Sleeve valve. In the 70 s: a new structure of products & ndash; — The advent of eccentric rotating valve ( 9 kinds structure of the pneumatic control valve) 。 This time the sleeve valve is widely used in foreign countries. In the late 70 s, domestic joint sleeve valve is designed, make China has its own sleeve valve products. : in the 80 s during the reform and opening up, China's successful introduction of the technology of petrochemical device and pneumatic control valve, make the sleeve valve, eccentric rotary valve is used widely, especially the sleeve valve, replace single, two-seat valves, its use is more and more widely. Another significant progress in the late 80 s, pneumatic control valve is Japan's Cv3000 and small pneumatic control valve, they are in terms of structure, change the single spring pneumatic diaphragm actuator to more spring loaded diaphragm actuator, valve structure is improved, and not change. Its outstanding characteristic is to make the weight of the pneumatic control valve and a 30% drop in height, the flow coefficient increased by 30%. Pneumatic control valve of the 90 s, 90 s focus is on reliability, special difficult products research, improvement and improve. In the 90 s, by the shenyang company launched the first ten kinds of structure of products & ndash; — A fully functional ultra light valve. Its outstanding characteristic is in reliability, function, and weight. The breakthrough of function & ndash; — The only products with full function, therefore, can be made of a product instead of numerous products of function is not complete, make the selection and use of simplification, varieties of simplified; In the breakthrough of weight & ndash; — Than the leading product single-seat valves, two-seat valves, the sleeve valve light 70 ~ 80%, are less than pure small valve 40 ~ 50%; The reliability of the breakthrough & ndash; — Solve the unreliability factors such as traditional pneumatic control valve, such as the reliability of the seal, the reliability of positioning, the reliability of action, etc. The arrival of the products, and make China's pneumatic - valve technology and application level has reached the advanced level, in the late ninety s; It was a great breakthrough of pneumatic control valve; Especially electronic fully functional ultra light valve, will become the mainstream of the pneumatic control valve in the 21st century.