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ST008NBW

Needle Valve

Welding high-pressure needle valves for power plants are designed specifically for thermal power generation, nuclear power, and supercritical units

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    Parameter

    ○ PTFE: Operating temperature -65 ℉ -450 ℉ (-53 ℃ -232 ℃)

    ○ Graphite: Operating temperature -65 ℉ -1200 ℉ (-54 ℃ -648 ℃)

    ○ Nominal diameter: SW1/2 "(1/4"~1 ", 6mm~28mm);

    ○ Port form: SW socket welding (OD sleeve, BW butt welding, UBM sleeve welding, thread, etc.)

    ○ Valve body material: 316 stainless steel, alloy 400, 20, C-276, and titanium

    ○ Working pressure: 6000PSIG (413bar)~10000PSIG (689bar)


    Performance

    ○ The harsh working conditions combined with the valve cap needle valve can be applied to various harsh working conditions such as high temperature, high pressure, and high erosion.

    ○ The design of the packing bolt allows for packing adjustment in the open position;

    ○ The threads of the valve stem and valve stem nut are rolled, greatly improving the thread cycle life;

    ○ Lubrication of the valve stem thread can isolate the system medium, and the valve seat plays a sealing role after the fully open position is safe;

    ○ Non rotating spherical valve tip with replaceable adjustable and V-shaped valve heads.

    ○ Valves can be installed on panels;

    ○ The double high lock bolts ensure a durable and stable connection of the handle;

    ○ The handle comes in multiple colors to choose from;

    ○ Each valve undergoes a sealing test before leaving the factory, and a sealing test is conducted at 1.5 times the rated working pressure with a water pressure of 5%.


    Application

    The welding high-pressure needle valve used in power plants is specially designed for thermal power generation, nuclear power, and supercritical units. It adopts a fully welded structure to eliminate the risk of external leakage and is suitable for media such as high-temperature and high-pressure steam, feedwater, and thermal oil; The valve body is mostly made of chromium molybdenum alloy steel (such as WC6, WC9) or stainless steel forged as a whole, with a pressure resistance of PN160-PN640 and a temperature resistance of up to 570 ℃; The precision needle valve core, combined with a hard sealing structure, ensures long-term stable operation and precise flow regulation, meeting the strict requirements of power station systems for safety, reliability, and long service life.

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