Origin and development of valves
Valves are devices used to control fluid flow , pressure and flow direction , and are control components in the pipeline delivery system .The controlled fluid may be a liquid , gas , gas - liquid mixture , or a solid - liquid mixture .The control function of the valve is achieved by the driving mechanism or fluid to drive the opening , slide , swing or swing motion to change the size of the flow passage area .
Val ves are widely used , from the simplest stop valves to various valves used in extremely complex self - control systems .Val ves are closely related to people's daily life , such as tap pipes and pressure relief valves for LPG stoves are all valves .Val ves are also indispensable components of various machinery such as internal combustion engines , steam engines , compres sors , pumps , pneumatic drives , hydraulic drive vehicles , ships and vehicles .
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Birth of the valve
The Application of the Val ve in the Industry
In 1769 Wat t invented the steam engine to enter the mechanical industry , with large use of plug valves , safety valves , check valves and butterfly valves .
From the 18 th to 19 th centuries , the rapid promotion of steam engines in mining , smelting , textile , machinery manufacturing was increasing in the number and quality of valves .The cutting valve with th read ed valve rod and the wedge gate valve with trapezoidal th read ed valve rod are a major breakthrough in the development of valves . The emergence of these two types of valves not only met the requirements of valve pressure and temperature in various industries at that time , but also initially met the requirements of flow regulation .Since then , the rise of electricity , oil , chemical , shipbuilding industries , various high school pressure valves have developed rapidly .
's After World War II , the old plug and butterfly valves gained new applications due to the development of various special materials , including polymer ic materials , lubricating materials , stainless steel and cobalt - based hard alloy , with ball and diaphragm valves evolving from the plug .The variety of stop valves , gate valves and other valves and improved quality .The valve manufacturing industry has gradually become an important department of the machinery industry .
Development of the internal valve industry
Since the 1 9 7 0 s , with the expansion of industrial production scale , some large petrochemical enterprises have also introduced some control valves , which has pointed out the development direction for domestic control valve manufacturers .
In the 1 9 8 0 s , with the implementation of China's reform and opening up policy , the manufacturing technology and product quality of valves had been rapidly improved , various types of sleeve valves and eccentric rotary valves were produced , and the fine small regulating valves were developed .
In the 1 9 9 0 s , it was an era of rapid economic development . At the same time , China's regulating valve industry also began to introduce and digest foreign advanced technologies , filling the gap of some special industrial control , improved the level of China's regulating valve industry , and shortened the gap with foreign countries .
With the development of modern nuclear , petrochemical , electronics and space industries , and the development of automatic process control and remote fluid delivery , it promotes the development of modern low temperature , vacuum , nuclear industry valves and various regulating valves .Increasing applications of valve drives for long - distance control and program control .
From ancient times to the present , the valves have witnessed the changes of The Times . At the same time , The Times have also witnessed the development process of the valves from less to more , from simple to complex , and from shallow to deep .
's Nowadays , there are about 6 , 0 0 0 large valve enterprises in China , and small valve enterprises are countless , while stunt valve group is a modern , diversified and professional valve enterprise integrating research and development , production and sales , with two major production bases in Wenzhou and Shanghai
