Many people do not know the relevant knowledge of fluorine-lined butterfly valves, which will bring some trouble to the use of fluorine-lined butterfly valves. The following small series will take you to understand the relevant knowledge of fluorine-lined butterfly valve. Due to the limitation of structure and sealing material of fluorine-lined butterfly valve, it is not suitable for high temperature and high pressure pipeline system. The general working temperature is below 300℃, and the nominal pressure is below PN40. The butterfly valve can be opened or closed only by rotating 90°. Compared with the gate valve
, the butterfly valve has a relatively large pressure loss, so it is suitable for the pipeline system where the pressure loss requirements are not strict. Therefore, the butterfly valve should be selected in the occasions where the opening and closing requirements are fast. Since the structure length of the butterfly valve is relatively short, and it can be made into a large diameter, the butterfly valve should be selected in the case of short structure length or large diameter valve (such as DN1000 or more). It is suitable to use double eccentric butterfly valves that are sealed to metal wires in the pipelines, which are suitable for urban heating, steam supply, water supply and gas, oil, acid and alkali pipelines as adjustment and interception devices. In addition to being used as a program control valve for a large-scale pressure swing adsorption (PSA) gas separation device, the metal-to-metal surface sealing triple eccentric butterfly valve can also be widely used in petroleum, petrochemical, chemical, metallurgy, electric power and other fields. Good alternative. When throttling adjustment under special working conditions, or requiring strict sealing, or serious wear, low temperature (cryogenic) and other working conditions, butterfly valves need to be specially designed for triple eccentricity or double eccentricity with specially designed metal sealing belt adjustment device. Butterfly valve. The structure length and overall height of the butterfly valve are small, the opening and closing speed is fast, and it has good fluid control characteristics. The structure principle of the butterfly valve is suitable for making large-diameter valves. When the butterfly valve is required to be used for flow control, it is important to correctly select the size and type of the butterfly valve so that it can work properly and effectively for flow regulation. Because the pressure loss of the butterfly valve in the pipeline is relatively large, about three times that of the gate valve, when selecting the butterfly valve, the influence of the pipeline system by the pressure loss should be fully considered, and the firmness of the butterfly plate to withstand the pressure of the pipeline medium should also be considered when it is closed. sex. In addition, the operating temperature limitations of the elastomeric seat material at elevated temperatures must also be considered.
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