Chemical valves are an important accessory for fluid control on industrial pipelines. Facing the various industrial conditions and the wide variety of valve conditions, you should choose the right valve for the pipeline system. You should understand the performance of the valve. The steps and basis for selecting the valve should follow the principle of selecting valves for petroleum and chemical industries.
    Chemical valves are not only suitable for a wide range of applications, but also have a large amount of use. Of course, chemical valves are more demanding than ordinary valves. The valves used in chemical valves are generally easy to corrode, simple chlor-alkali industry, to large petrochemical enterprises, there are high temperature, high pressure, corrosion resistance, wear resistance, temperature and pressure difference. For this kind of dangerous valve, it should be strictly in accordance with chemical standards during the selection and use. Taichen Company is a professional chemical valve manufacturer, which is manufactured in strict accordance with the standards of the Ministry of Chemical Industry.
    Chemical valve selection principle:
    In the chemical industry, valves with straight-flow valves are generally used, and their flow resistance is small. Valves for cut-off and open media are usually selected. Valves with easy to adjust flow are used as control flow. Plug valves and ball valves are more suitable for commutating and shunting. The slide of the closure member along the sealing surface with a wiping action is suitable for media with suspended particles. Common chemical valves include ball valves , gate valves , globe valves , safety valves , plug valves , check valves , etc. The chemical medium mainly contains chemical substances and contains a lot of acid and alkali corrosion media. The ceramics of Taichen manufacturers mainly dominates 304L and 316. The common medium selects 304 as the leading material, and the combination of various chemical substances uses alloy steel or Fluorine-lined valve.
    The role of chemical valve types:
    Open and close type: cut or communicate the flow of fluid in the pipe;
    Adjustment type: adjust the flow rate and flow rate in the pipe;
    Throttle type: causes a large pressure drop after passing the fluid through the valve;
    Other types: a. Automatic opening and closing b. Maintain a certain pressure c. Block steam drainage.
    Precautions before using chemical valves:
    Have inner and outer surfaces of the valve body ①trachoma, cracks and other defects;
    2 Whether the valve seat and the valve body are firmly connected, whether the valve core and the valve seat are in agreement, and whether the sealing surface has defects;
    3 Whether the connection between the valve stem and the valve core is flexible and reliable, whether the valve stem is bent or not, and whether the thread is damaged;
    Steel flange chemical standard:
    Ministry of Chemical Industry Engineering Construction Technical Specification [ HGJ44-HGJ68-1999 ]
    Ministry of Chemical Industry Standards; European System [ HG20592-HG20605-1997 ]
    Ministry of Chemical Industry Standards; European System [ HG20613-HG20623-1997 ]
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