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ST0045LB

Needle Valve

The integrated welded double needle valve is primarily used in gas dispensing devices, serving as an instrument root valve or process valve.

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    Parameter

    ○ Port type: MTB butt welding (MTS socket welding, ferrule, UBM loop welding, thread, etc.)

    ○ Operating temperature: -20℃~520℃

    ○ Pressure environment: 6000PSI, with a maximum of 10000psi (689bar)

    ○ Diameter: BW3/4" (1/8"-2", 3mm-50mm)

    ○ Drive mode: straight handle, handwheel

    ○ Material: 304, 316, 321, Hastelloy, Monel


    Performance

    ○ One-piece forged design

    ○ Dual valve stem design: upper valve stem with threaded hardening and lower valve stem with surface hardening

    ○ Isolate the lower valve stem thread lubricant from the system medium

    ○ Linear, rather than non-rotating, helical movement of the lower valve stem prevents wear and damage to the valve seat and tip, reducing the total friction area between the packing and the lower valve stem

    ○ Safety back seat seal in fully opened position

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


    Application

    The integrated welded double needle valve is primarily used in gas dispensing devices, serving as an instrument root valve or process valve. This valve features a dual-valve design, with one valve body controlling two flow paths and equipped with short tubes at both ends. The valve body and the short tubes at both ends are forged as a single unit, eliminating welding points. It adopts a two-section structure with an upper threaded valve stem and a lower valve stem with inverted sealing, providing excellent packing sealing and allowing for lightweight switching.

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