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A Duplex Needle Valve is a finely crafted flow control device that expertly manages fluid flow, especially in high-pressure and corrosive environments. Made from duplex stainless steel, these valves blend the robust qualities of ferritic steels with the impressive corrosion resistance of austenitic steels. This combination makes them highly resistant to pitting, stress corrosion cracking, and erosion, ensuring they perform reliably over time, even in harsh conditions. With their exceptional durability, these valves provide strong mechanical strength, leak-tight sealing, and dependable operation, making them perfect for industries that demand precise flow regulation, efficiency, and safety in critical applications.
Typically, Duplex Needle Valves are composed of chromium, nickel, molybdenum, and nitrogen, which give them remarkable strength and resistance to corrosion caused by chlorides. The duplex structure enhances their toughness, hardness, and fatigue resistance compared to standard stainless steels. On a mechanical level, these valves boast high tensile strength, durability, and wear resistance, allowing them to handle high-pressure situations while maintaining precise flow control. Thanks to their excellent weldability, toughness, and fabrication characteristics, Duplex Needle Valves are a trusted option for challenging environments that require both strength and resistance to corrosion.
| VALVES SIZE | 6 MM TO 50 MM and 1/8″ TO 2″ |
| STANDARD | ASME B 16.10, BS1414/API 600, ASME B 16.5, BS EN 12266-1/API 598, ASME B 16.34, ASTM A890 4A, ASME B 16.25 |
| CONNECTION | TUBE END, THREADED, SOCKET WELD, BUTT WELD, FLANGED, WELD NIPPLE, SAE |
| THREAD | METRIC, BSPP, NPT, JIC, BSPT, UNF |
| FUNCTION | 2 , 5 , 4 , 3 WAY, |
| MATERIAL OF SEAL RING | PVDF, DELRIN, GRAPHITE, PTFE, PEEK, |
| PRESSURE RATING | 15000 , 3000, 1500 , 10000, 6000 , 20000 PSI |
| TEMPERATURE OF MEDIA | (-120* C – 500*C ) AS LIKE PRESSURE RANGE |
| STANDARD | DIN , ISO , API , ANSI , AWWA , ASME , MSS |
| MEDIA | AIR, CHEMICAL, GAS, WATER, STEAM, HOT WATER , HYDRAULIC OIL, COLD WATER, SEA WATER |
| TYPE OF BODY | BAR STOCK |
| EQUIVALENT BRANDS | OLIVER VALVES, PARKER, SWAGELOK, HAMLET, DK-LOK, HOKE |
| PACKING DETAILS | WOODEN PALLET, BOX PACKING |
| ELEMENT | DUPLEX 31803 | DUPLEX 2205 |
|---|---|---|
| NI | 4.50 – 6.50 | 4.50 – 6.50 |
| C | 0.030 max | 0.030 max |
| N | 0.14 – 0.20 | 0.08 – 0.20 |
| P | 0.030 max | 0.030 max |
| MN | 2.00 max | 2.00 max |
| CR | 22.0 – 23.0 | 21.0 – 23.0 |
| S | 0.020 max | 0.20 max |
| MO | 3.0 – 3.5 | 2.50 – 3.50 |
| SI | 1.00 max | 1.00 max |
| FE | 63.72 min | 63.54 min |
| Grade | % Elongation | YS (MPa) | Hardness(BHN) | UTS (MPa) |
| 31803 | 25 min. | 450 min. | 293 max. | 620 min. |
| 2205 | 25 min. | 450 min. | 293 max. | 655 min. |
At Chanathip Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Needle Valve in Bangkok, Thailand, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Thailand, allowing us to maintain a vast inventory of over 16,000 tons of premium-quality materials readily available in stock. We are dedicated to delivering superior products and services, ensuring reliability and excellence for our global clientele.
Contact us to get a quick quote for your requirement.
These valves find their place in various industries, including oil and gas, chemical and petrochemical processing, marine engineering, water treatment, and power generation. They are especially well-suited for offshore platforms, refineries, and desalination plants, where they frequently encounter aggressive chemicals and seawater. In instrumentation systems, they play a crucial role in precise flow regulation, sampling lines, and hydraulic control systems. Their ability to endure high pressure, corrosive fluids, and extreme conditions makes them a reliable choice for demanding applications.
