Regulator is the development process of the development of the regulating valve since the 20th century since the initial seven, eighty years of history, has produced the ten kinds of valve products, self-reliance type valve and positioner, etc, its development process is as follows:

s: the stability of the original pressure with the regulator. :

30 s to & other; V” Type gap two-seater and single-seat valves as representative products.

40 s: a locator, regulator further produce new varieties, pneumatic Angle seat valve, diaphragm valve, butterfly valve, ball valve, etc.

s: ball valves get bigger promotion use, three-way Industrial Valves to replace two single-block valve input system.

in the '60 s: the home has a complete series of products. Now we are in a large number of use single-seat valve, two-seat valve, Angle seat valve, three-way valve, diaphragm Industrial Valves, butterfly valve, ball valve, seven kinds of products is still in the 60 s level of products. At this time, the overseas started to launch the 8 kinds of structure regulator & ndash; — Sleeve valve.

in the 70 s, and a new structure of products & ndash; — The advent of eccentric rotating valve ( 9 kinds of the structure of the regulator) 。 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, early 80 s, due to the reform and opening up, China's successful introduction of a petrochemical plant and control valve technology, 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, the regulator is Japan's Cv3000 and small regulator, 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 regulator and a 30% drop in height, the weight of the flow coefficient increased by 30%.

: in the 90 s to 90 s in reliability, special difficult products is the focus of the research, improvement and improve. By the 90 s, 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 and simplified.

There are a wide variety of which are scientifically tested to have positive effects on the ability to resilient valve. cast iron gate valve gate valve is one of them.
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