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Metal seated butterfly valve is that both sides of the seal are made of metal material or other hard materials. This seal has relatively poor sealing performance, but is resistant to high temperatures, abrasion and mechanical properties. Metal seated is often combined of such as: steel + steel, steel + copper, steel + graphite, steel + alloy steel. The steel here may also be cast iron, c...
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Valves are control components in fluid transfer systems, with a variety of different functions such as stopping, regulating, diverting, preventing backflow, stabilizing pressure or overflowing pressure relief. Therefore, it can be used in many fields and has a wide range of uses. It can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, slurr...
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1. Application of Knife Gate Valve 1. Mining, iron and steel industry: used for coal, slag slurry, etc; 2. Purification device: used for waste water, mud, dirt and clarified water with suspended solids; 3. Paper industry: used for pulp and feed water mixture of any concentration; 4. Ash removal of power station: used for ash slurry. 2. Performance of Knife Gate Valve 1. Local and remote control, r...
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Today, Dervos takes you to know which components of soft seal gate valve are prone to leakage and how to prevent and remedy it well. 1.Leakage at Gate Valve Connection First, we should check whether the connecting bolts between gate valves are tightened, ensure that the sealing gasket ring in it is fully combined with the flange sealing groove surface. Secondly, if leakage has occurred, please do ...
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What are the main reasons for the damage of the sealing surface of the high-pressure ball valve during its use? Let Dervos introduce it to you! 1. Mechanical Damage During the opening and closing process, the sealing surface will be scratched, bumped, squeezed and other damages. The atoms between the two sealing surfaces penetrate each other under the action of high pressure, resulting in ad...
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Full welded ball valve is a typical narrow gap submerged arc welding product, which involves the knowledge of materials, welding technology, automatic development of welding equipment and design of pipeline ball valve. The valve seat of full welded ball valve is composed of carbonized Teflon sealing ring and butterfly spring, so it has strong adaptability to pressure and temperature changes. Appli...
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