A needle valve is a valve used for precise control of fluid flow. Its specifications typically include key parameters such as nominal diameter, pressure rating, connection type, and material. Needle valves have a wide range of nominal diameters, commonly including DN8, DN10, DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, and DN100. Pressure ratings are typically 16 kg, 25 kg, and 40 kg, suitable for various working environments. Connection types include welding, threaded connections, and flanges, and materials include stainless steel, carbon steel, and brass. Needle valves are widely used in industries such as petroleum, chemical, power, and metallurgy to control the flow and pressure of gases and liquids. When selecting a needle valve, it is necessary to choose the appropriate model based on specific operating conditions, such as the properties of the medium, temperature, and pressure. Furthermore, the sealing performance, corrosion resistance, and service life of the needle valve are also important factors to consider.
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