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Valve is the control component of the delivery system of fluid.What’s New? Buys of etching machine Come out in Zaporozhye. It has a lot of functions such as blocking, regulating, diverting, preventing reflux and so on. There are a number of types of valves, ranging from the simplest to the most complicated. Actually, valve is used to control the flow of all kinds of liquids such as water, mud, oil and air and steam etc.
Valve comes into being with the appearance of the pipeline. It has been about 4000 years since people began to use valve. In China, the ancient people once used the cork valve in the bamboo pipes when they were taking brine from the salt well. In 1800 BC, ancient Egyptians turned to something like valve to control the distribution of water when they were building the large-scale water structure in order to prevent the Nile flooding. As a matter of fact, they are just the prototype of the valve. Precisely, the application of a large number of industrial valves was after Watt had invented the steam engine. And in the early 20th century, more valves are produces. They are made of all kinds of materials like steel, iron, forged steel.
People classify the valves into different categories according to the different criteria. According to the functions, there are block valve, check valve, safety valve, regulating valve, diverter valve and exhaust valve. And according to the nominal pressure, the valves can be vacuum one, low pressure one, middle pressure one, high pressure one and excess high pressure one. And with operating temperature, we have superlow temperature valve, cryogenic valve, room temperature valve, high temperature valve. By driving way, automatic valve, driving valve including motorized valve, pneumatic valve and oil controlled valve, and hand operated valve belong to this classification. By structure, we own ball valve, plug valve, butterfly valve and so on. In a word, there are so many kinds of valves that we can not list all of them.
Nowadays, a variety of valves are widely applied in our daily life. They are playing a very important role. With them, people can connect or disconnect the media in the pipes; regulate and control the flow and pressure of the media in the pipelines; change the direction of the media and prevent the media in the pipes from returning. In addition, it can be used to separate media or direct and regulate the fluid levels. In a word, it is the switch in the delivery system of fluid.Take a Look at the Merits and Disadvantages of etching machine supplier.