What is a valve? I think it can't be strange for us. It is a basic part in many different areas.
Valve is a kind of control component in the fluid delivery system, with the functions of closing,
regulation, diversion, countercurrent prevention, voltage regulation, shunt, etc. Valves used in
the fluid control system, from the simple stop valves
valves used in the highly complex automatic control system, can be divided in
many different types and specifications. The valve can be used to control the flow of air,
water, steam, a variety of corrosive media, mud, oil, metal and radioactive liquid media and other types of fluid.
With the development of modern science and technology, the application of valves has become widespread in industry,
construction, agriculture, national defense, scientific research and other aspects of people's living.
Now it has become the general and indispensable machinery product in all areas of human activities.
There have been nearly 4,000 years of human using the valves. In ancient China,
when people absorbed salt brine from the salt well to make salt, the cork valve was used in a bamboo pipe.
In the year of 1800 BC, the ancient Egyptians have already adopted a similar wooden cock to control the flow
distribution when building the large-scale water conservancy to prevent Nile flooding.
These are the prototype of the valve. A large number of applications for industrial valves was started soon
after the invention of steam engine by Watt. In the early twentieth century, there have been steel, cast iron,
forged steel and forged welded structure valves.
There are many classification methods of valves, while they are mainly classified according to their different roles
in the pipelines. General valves used in industrial and civil engineering can be divided into 11 categories,
which include gate valves, globe valves, plug valves, ball valves, butterfly valves, diaphragm valves, check valves,
throttle valves, safety valves, pressure reducing valves and steam traps. According to their different types
and different application requirements, there are different properties of valves including seals, strength,
conditioning, circulation, open and close, etc. In the design and selection of valves, in addition to considering
the basic parameters and performance, the fluid properties also need to be considered, including the fluid
phasestate (gas, liquid or solid particles), corrosive ability, viscosity, toxicity, flammable and explosive feature,
valuable degree and radioactivity and so on.
Sealing performance and strength properties are the most basic and the most important performance of all valves.
Valve manufacturing industry plays a very important role in the national economic development as an important part
of preparing manufacturing. So, where can find these useful valves
How to find valves with high qualities? Try to search some information on the Internet, like Google, etc.
dedicated to introduce China qualified products, suppliers and manufacturers to global buyers,
and also help global buyers to find much more China qualified products, suppliers and manufacturers.
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