What is a valve?

The valve is the control component of the fluid delivery system. Its main functions are: connecting or cutting off the fluid path; regulating and throttling; preventing backflow; regulating pressure, releasing excess pressure, and draining liquid and blocking steam. How well these functions are implemented determines the performance of the system to a large extent.

What are the valve materials and driving methods?

In recent years, due to the needs of petroleum, chemical industry, power stations, metallurgy, ships, nuclear energy, aerospace, etc., higher requirements have been put forward for valves, prompting people to research and produce high-parameter valves, whose operating temperatures range from ultra-low temperature -269°C to high temperature 1200℃, even as high as 3400℃; the working pressure ranges from ultra-vacuum 1.33×10-8Pa to ultra-high pressure 1460MPa; the nominal size of the valve is DN1~6000, even up to DN9750; the material of the valve has developed from cast iron, carbon steel, stainless steel, to titanium Alloy steel, etc., as well as high-strength corrosion-resistant steel-low temperature steel, heat-resistant steel and lining valves of various composite materials; valve driving methods have developed from manual to electric, pneumatic, hydraulic to program control, numerical control, remote control, etc. The processing technology of valves ranges from ordinary machine tools to CNC machine tools, and even production lines and automatic assembly lines. In order to facilitate production, installation, and replacement, valve varieties and specifications are developing in the direction of standardization, generalization, and serialization.

What are the applications of valves?

With the development of modern science and technology, valves are increasingly used in industry, construction, agriculture, national defense, scientific research and people's lives, and have become indispensable general mechanical products in various fields of human activities. The demand for valves continues to grow with the development of the national economy. A modern petrochemical plant requires about 10,000 valves of various types, and a modern residential building also requires several thousand valves. Valves are used a lot and are opened and closed frequently. Valves often cause running, popping, dripping and leaking due to improper use or poor product quality. As a result, accidents such as fires, explosions, poisoning, and burns occur from time to time, causing heavy losses to the country and people's lives and property. Therefore, it is very important to design and manufacture high-quality valves, select valves reasonably, and use and maintain valves correctly.