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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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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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In the process of using the valve, we will encounter various working conditions, such as high temperature and low temperature. In this case, how should we choose the valve? 1. High Temperature Conditions When selecting valves, it is necessary to consider using shell materials and internals materials with high temperature strength, such as austenitic stainless steel valve and bidirectional sta...
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The biggest difference between the ball valve and the butterfly valve is that the opening and closing parts of the butterfly valve are a plate, while the ball valve is a ball. Characteristics of Butterfly Valve: 1. Simple structure, low consumption and low cost, but poor tightness and bearing capacity; 2. Quick opening and closing, small flow resistance; 3. It is suitable for making large diameter...
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Butterfly valve is a common valve that can be used for regulating performance, and it is widely used in today's valve applications. The most common fault of butterfly valve in use is that the sealing surface is easy to leak. What measures should we take to prevent the butterfly valve from leaking? 1. Ensure the clearance between the sealing surfaces. Since the sealing between the rubber seal ring ...
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