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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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As a component used to realize the on-off and flow control of pipeline system, butterfly valve has been widely used in many fields such as petroleum, chemical industry, metallurgy, hydropower and so on. There is an advanced butterfly valve: three eccentric metal hard seal butterfly valve. The valve body and the valve seat are connected components, the sealing surface of the valve seat is overlaid ...
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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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Soft seal gate valves are usually used as industrial valves. The deformation compensation function is generated by the overall rubber coating of the gate, which achieves good sealing effect, overcomes the problems of poor sealing, water leakage and rust of general gate valves, saves installation space more effectively. Advantages of Soft Seal Gate Valve: (1) Low fluid resistance The medium c...
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The valve body, bonnet and wedge (disc) are the main parts of the valve, which directly bear the medium pressure. The materials used must comply with the provisions of "pressure and temperature rating of the valve". Common materials are as follows: 1. Grey Cast Iron Grey cast iron is suitable for water, steam, air, gas and oil media with nominal pressure PN ≤ 1.0MPa and temperature between -...
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After selecting a suitable valve, it is necessary to install, maintain and operate it correctly, so as to give full play to its efficiency. The quality of valve installation directly affects its use, so it must be paid attention to carefully. 1. Direction Many valves have directionality, such as globe valve, throttle valve, pressure relief valve, check valve, etc. If installed reversely, it will a...
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