J23W Male Threaded Needle Valve with Weld End
manufacturer: Kaiweixi Valve Group Co., Ltd
Eml: Merry@kaiweixi.com
Tel: +86 (577) 67038872
Mob: +86 18157711652（WeChat Same Account）
product drawing
J23W Male Threaded Needle Valve with Weld Ends
Overview
The J23W Male Threaded Needle Valve with Weld End 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.
Features:
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.
Dimensions & constructral diagram
J23W Male Threaded Needle Valve with Weld End constructral diagram
Parts List
| Model | Stem & Bonnet | Stem & Disc | Packing |
|---|---|---|---|
| J21/3W-16P | Chrome-nickel stainless steel | Chrome-nickel stainless steel | PTFE, Flexible graphite |
| J21/3W-160 | / | Chrome stainless steel | PTFE, Flexible graphite |
| J21/3W-40 | High-quality carbon steel | Chrome stainless steel | PTFE, Flexible graphite |
Performance Specification Sheet
| Model | Nominal Pressure | Test Pressure (MPa) | Working Pressure | Working Temperature | Applicable Medium | |
|---|---|---|---|---|---|---|
| (MPa) | Casing (liquid) | Seal (gas) | (MPa) | (°C) | ||
| J23W-16 | 1.6 | 2.4 | 0.6 | 1.6 | P≤540°C | Liquefied petroleum gas, water, acid, steam, oil products, etc. |
| J23W40P | 4.0 | 6.0 | 0.6 | 4.0 | ||
| J23W-160 | 16.0 | 24.4 | 17.6 | 16.0 | ||
| J13W-320P | 32.0 | 48.0 | 35.2 | 32.0 | C≤425°C | |
Outline dimension table
| Nominal Diameter DN (mm) | Dimension | Weight (kg) | ||||||
|---|---|---|---|---|---|---|---|---|
| D0 | D1 | D2 | L | H1 | H2 | M | ||
| 6 | 65 | 14 | 6 | 140 | 96 | 106 | 20×1.5 | 0.9 |
| 10 | 80 | 18 | 10 | 160 | 115 | 125 | 24×1.5 | 1.18 |
| 15 | 100 | 22 | 15 | 180 | 122 | 132 | 30×2 | 2.0 |
| 20 | 110 | 28 | 18 | 220 | 156 | 166 | 30×2 | 3.5 |
| 25 | 140 | 33 | 22 | 230 | 169 | 180 | 39×2 | 4.3 |
