The J23W external thread needle valve with welded tube is a small-bore instrument valve featuring male thread connections and a pre-fabricated welded tube end. It is operated by rotating the handwheel to drive the stem and needle-type disc for precise opening and closing. Its sealing surface is directly machined from the valve body material (“W” type), forming a metal-to-metal hard seal. One end features a standard male thread (such as M20×1.5, G1/2, NPT1/2), while the other end has a pre-fabricated welded tube for direct butt welding to the process pipeline, creating a permanent, zero-leakage sealing structure. This valve is primarily used for root isolation of pressure gauges and transmitters, pipeline sampling, flow regulation, and draining/venting, especially in high-temperature, high-pressure, vibrating applications, or critical occasions requiring absolute sealing, ensuring safe and reliable operation of measurement systems.

Product Drawing of J23W Male Threaded Needle Valve with Weld End

1.Composite male thread + welded connection: One end features a male thread for easy instrument connection; the other end has a pre-fabricated welded tube for direct butt welding to the process pipeline, creating a permanent, zero-leakage seal.

2.Specifically for high-temperature and high-pressure applications: Welded connection eliminates potential leakage risks of threaded connections, making it ideal for harsh conditions involving high temperature, high pressure, and severe vibration.

3.Needle-type disc for precise regulation: The needle disc cooperates with the seat to enable precise adjustment and control of small flow rates with excellent regulation performance.

4.Metal-to-metal hard seal for reliability: Sealing surfaces are directly machined from stainless steel, forming a wear-resistant metal-to-metal hard seal with long service life.

5.All-stainless steel corrosion resistance: Body and main components are made of 304/316 stainless steel, providing excellent corrosion resistance for various corrosive media.

6.High-pressure design: Robust body structure withstands high working pressures, suitable for high-pressure applications.

7.Reliable stem sealing: Multi-layer packing or PTFE sealing with gland prevents external leakage.

8.Compact structure for flexible installation: Small size suits space-limited installations, while the composite connection offers installation flexibility.

Structure Diagram of J23W Male Threaded Needle Valve with Weld End

Component name and material

Performance Specification Sheet

J23W Male Threaded Needle Valve with Weld End Outline Drawing

Outline dimension table