Chemical valve selection principle

Chemical valves Overview: Chemical valves are an important accessory for fluid control in industrial pipelines. Faced with complex industrial systems and a wide variety of valve operating conditions, you want to choose the right valve for the pipe system and you should understand the performance of the valve , Two should choose the steps and basis for choosing the valve, three should follow the principle of choosing the valve of petroleum and chemical industry. Chemical valve is not only applicable to a wide range, but also the amount of more, of course, chemical valves than the average valve to be higher. Chemical valves generally use the media are relatively easy to corrosion, a simple chlor-alkali industry, to large-scale petrochemical enterprises, there are high temperature, high pressure, corrosion resistance, wear resistance, great temperature pressure difference. The face of such a higher risk of the valve, the selection and use of the process should be strictly in accordance with the implementation of chemical standards. Taichen company is a professional manufacturer of chemical valves, manufactured in strict accordance with the Ministry of Chemical Industry standards. Chemical valve selection principle: The chemical industry generally chooses the flow channel as a straight-through valve, the flow resistance is small, usually choose as the cut-off and open media valve, easy to regulate the flow of the valve as a control flow, plug and ball valve more applicable In the diverting shunt, the sliding member along the sealing surface sliding with a wiper valve is most suitable for medium with suspended particles. Common chemical valves are ball valves, gate valves, globe valves, safety valves, plug valves, check valves and so on. Chemical valve with the mainstream of chemical substances, including acid-base corrosion of a wide range of media, the main chemical manufacturers in Taiwan Chen led 304L and 316-based materials, 304 as the common medium as the leading material, a variety of chemicals with corrosive fluid alloy steel or Lined fluorine valve. Chemical type of valve role: Opening and closing type: cut off or communicate the flow of fluid within the tube; Regulation type: regulate the flow of the tube, the flow rate; Throttle: the fluid through the valve after a great pressure drop; Other types: a. b. to maintain a certain pressure c. steam drainage. Chemical valve before use Note: ① the valve body inside and outside the surface with or without blisters, cracks and other defects; ② seat and valve body is solid, the valve plug and valve seat is consistent, sealing surface without defects; ③ stem and valve core The connection is flexible and reliable, the valve stem is bent, the thread is damaged or not; Steel Flange Chemical Standards: Chemical Engineering Construction Technical Specifications 【HGJ44-HGJ68-1999】 Ministry of Chemical Industry standards; European system 【HG20592-HG20605-1997】 Chemical Department standard; European system 【HG20613-HG20623-1997】

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