Home > Product > Needle valve > Needle Valve Types Materials > Duplex & Super Duplex Needle Valve Manufacturer in India
Superior Strength. Unmatched Corrosion Resistance. Made for the Harshest Systems.
At Perfect Engineers, we manufacture and export Duplex and Super Duplex Needle Valves engineered to withstand extreme pressure, chloride-rich environments, and aggressive chemical exposure. Crafted from Duplex S31803 and Super Duplex S32750/S32760, these valves are ideal for offshore rigs, desalination plants, chemical processing, and marine environments.
Our valves deliver leak-proof, high-strength, precision control—even in the world’s most demanding operating conditions.
Duplex needle valves are made from duplex stainless steels, combining austenitic and ferritic microstructures for higher strength and improved stress corrosion cracking resistance.
Super Duplex valves take this further with greater molybdenum and chromium content, offering even better resistance to pitting, crevice corrosion, and erosion in chloride-bearing environments.
Perfect for seawater systems, high-pressure gas skids, subsea manifolds, and oil & gas production lines.
| Parameter | Specification |
|---|---|
| Body Material | Duplex S31803 / Super Duplex S32750/S32760 |
| Pressure Rating | Up to 10,000 PSI |
| Temperature Range | -50°C to +350°C |
| Seat Options | PTFE, PEEK, Graphite, Metal-to-Metal |
| Valve Types | Straight, Angle, Bar Stock, Forged, Block & Bleed |
| End Connections | BSP/NPT, Flanged, Compression, SW/BW |
| Certifications | ISO 9001, EN 10204 3.1, IBR, Third-Party |
| Property | Duplex S31803 | Super Duplex S32750/S32760 |
|---|---|---|
| Chromium Content | ~22% | ~25% |
| Pitting Resistance Equivalent (PREN) | 34–36 | 40+ |
| Yield Strength | 2x that of SS 316 | Even higher |
| Corrosion Resistance | Very High | Extremely High |
| Ideal For | Industrial & marine use | Offshore & subsea critical use |
+91-9004860491
www.perfectqrc.com
Yes, available in ASME, ANSI, and DIN flanges with gasket surface finish and full material traceability.
All valves undergo hydrostatic and pneumatic tests, with EN 10204 3.1 MTC, IBR, and optional third-party inspection.
Typically 2–4 weeks, depending on size and configuration. Urgent orders can be fast-tracked.
Yes, we support custom configurations for instrumentation, control panels, and field installations.
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