Duplex Steel Instrumentation Ball Valves Manufacturer and Supplier
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The Duplex Stainless Steel Instrumentation Ball Valves are quarter turn compact valves that provide reliable shut off and isolation of flows in high pressure instrumentation. The valves are commonly made using the duplex 2205 stainless steel (UNS S31803 / S32205), which comes with high mechanical strength and resistance to chloride pitting corrosion, crevice corrosion and stress corrosion cracking. They are available in size ranging from 1/8” to 1” with NPT, BSPP, BSPT and twin ferrule compression connections. With PEEK seats, the valves are rated up to 6000 psig (414 bar) at room temperature. Aashish Metals is a trusted manufacturer and supplier of these valves with EN 10204 3.1, PMI and hydrostatic test certificates for offshore, desalination, chemical and power plants instrumentation applications.
Technical data
Specifications of Duplex Steel Instrumentation Ball Valves
| Specification Parameter | Technical Details & Standard Options |
|---|---|
| Product Name | Duplex Steel Instrumentation Ball Valve (high pressure mini and multi port) |
| Material Grades | Wrought / Barstock: Duplex 2205 (UNS S31803 / UNS S32205 / F60 / 1.4462 / ASTM A276 / ASTM A479) Casting Grade: ASTM A890 Grade 4A (CD3MN / J92205) |
| Size Range | 1/8" to 1" (1.1/2" available on request; refer to dimensional tables for standard stocked sizes) |
| Pressure Ratings | Working Pressure: 2500, 3000, and 6000 psig (172, 206, and 414 bar) |
| Temperature Limits | -29°C to 200°C with PEEK seats, up to 180°C with PTFE / TFM (see rating table) |
| Flow Coefficient (Cv) | 1.2 to 16.2 (size dependent, see dimension chart) |
| Seat & Seal Materials | Soft Seats: PTFE, PPL (Polyphenylene), PEEK, PVDF Stem Packing: PPL, Soft Graphite (Graphite Gland Packing) |
| Leakage Class | Soft Seat: Zero Leakage (100% Rate A per API 598) Hard / Metal Seat: Leakage class per ASME FCI 70-2 (class specified on request) |
| End Connections | Single Ferrule Compression, Double / Twin Ferrule Compression, Threaded (Female / Male NPT, BSPP / G-Thread, ISO 6149), Flanged Options (SAE C.61 / C.62 4-Bolt, Split, Combo Split Flange) |
| Valve Functions | 2-Way, 3-Way (L-Port / T-Port Diverter), 4-Way, 5-Way (Normally Open / Normally Closed) |
| Operation Types | Manual (Lever / Lockable T-Handle), Pneumatic Actuator, Electric Actuator |
| Design & Manufacturing Standards | ASME B16.34, BS 1868, ASME B16.10, ASME B16.5, ISO / DIN / SMS / JIS |
| Testing & Quality Assurance | Shell and seat test per API 598 / ISO 5208, PMI, visual inspection per MSS SP-55 |
| Thread & Fitting Standards | ANSI/ASME B1.20.1 (NPT), ANSI B16.11 (Socket Weld / Threaded), ISO 228-1 (BSPP) |
| Special Certifications | NACE MR0175 / ISO 15156 Compliant (Sour Service), API 607 Fire-Safe Certified |
| Interchangeability | Dimensionally compatible with common twin ferrule tube fittings (confirm tube OD and wall before ordering) |
| Applications & Media | Oil, Gas, Water, Chemical Processing, Desalination, Offshore Topside, Brine, Petrochemical |
| Port of Dispatch | Mumbai, India |
Chemical Compositions of Duplex Steel Instrumentation Ball Valves
| Element | UNS S31803 | UNS S32205 |
|---|---|---|
| Carbon (C) | 0.030 max | 0.030 max |
| Manganese (Mn) | 2.00 max | 2.00 max |
| Silicon (Si) | 1.00 max | 1.00 max |
| Phosphorus (P) | 0.030 max | 0.030 max |
| Sulfur (S) | 0.020 max | 0.020 max |
| Chromium (Cr) | 21.0 to 23.0 | 22.0 to 23.0 |
| Nickel (Ni) | 4.5 to 6.5 | 4.5 to 6.5 |
| Molybdenum (Mo) | 2.5 to 3.5 | 3.0 to 3.5 |
| Nitrogen (N) | 0.08 to 0.20 | 0.14 to 0.20 |
| Iron (Fe) | Balance | Balance |
Mechanical and Physical Properties of Duplex Steel Instrumentation Ball Valves
| Property | UNS S31803 | UNS S32205 |
|---|---|---|
| Tensile Strength, min. | 620 MPa (90 ksi) | 655 MPa (95 ksi) |
| Yield Strength (0.2% offset), min. | 450 MPa (65 ksi) | 450 MPa (65 ksi) |
| Elongation in 2 in. (50 mm), min. | 25% | 25% |
| Hardness, max. | 290 HBW (Brinell) / 31 HRC (Rockwell C) | 290 HBW (Brinell) / 31 HRC (Rockwell C) |
| Density | 7.8 g/cm³ (0.282 lb/in³) | 7.8 g/cm³ (0.282 lb/in³) |
Pressure and Temperature Rating of Duplex Steel Instrumentation Ball Valves
| Valve Size | Seat Material | Working Pressure @ -29°C to 38°C (-20°F to 100°F) | Working Pressure @ 150°C (302°F) | Working Pressure @ Max. Rated Temp. | Max. Temperature Limit |
|---|---|---|---|---|---|
| 1/4" to 1/2" | PEEK | 6000 psig (414 bar) | 4800 psig (331 bar) | 2500 psig (172 bar) | 200°C (392°F) |
| 1/4" to 1/2" | PTFE / TFM | 1500 psig (103 bar) | 600 psig (41 bar) | 0 psig (0 bar) | 180°C (356°F) |
| 1/4" to 1/2" | Delrin | 6000 psig (414 bar) | 1000 psig (69 bar) | 0 psig (0 bar) | 80°C (176°F) |
| 3/4" to 1" | PEEK | 5000 psig (345 bar) | 4000 psig (276 bar) | 2000 psig (138 bar) | 200°C (392°F) |
| 3/4" to 1" | PTFE / TFM | 1500 psig (103 bar) | 500 psig (34 bar) | 0 psig (0 bar) | 180°C (356°F) |
Dimensions Chart of Duplex Steel Instrumentation Ball Valves
| Nominal Size | Orifice Dia. (mm) | Face-to-Face L (mm) | Body Height H (mm) | Handle Length W (mm) | Flow Coeff. (Cv) | Weight (kg) |
|---|---|---|---|---|---|---|
| 1/4" NPT | 5.0 | 72.0 | 54.0 | 65.0 | 1.2 | 0.55 |
| 3/8" NPT | 7.0 | 78.0 | 58.0 | 65.0 | 2.4 | 0.68 |
| 1/2" NPT | 10.0 | 86.0 | 66.0 | 90.0 | 4.8 | 0.95 |
| 3/4" NPT | 15.0 | 102.0 | 78.0 | 110.0 | 9.5 | 1.60 |
| 1" NPT | 20.0 | 118.0 | 88.0 | 130.0 | 16.2 | 2.40 |
Types of Duplex Steel Instrumentation Ball Valves
Applications and Industrial Uses of Duplex Steel Instrumentation Ball Valves
- Offshore Oil and Gas Platforms
- Subsea Instrumentation Systems
- Chemical Processing Plants
- Desalination and Reverse Osmosis Plants
- Marine and Shipbuilding Industries
- Power Generation and Steam Systems
- Petrochemical Processing Facilities
- Hydraulic and Pneumatic Control Systems
Frequently Asked Questions
A compact quarter-turn valve made from 2205 duplex stainless steel (UNS S31803/S32205), offering high strength and excellent resistance to chloride corrosion and stress corrosion cracking.
Both are 2205 duplex grades. S32205 has tighter chemical composition limits, providing more consistent corrosion resistance. Modern production often dual-certifies both grades.
Yes, for seawater, marine, and chloride-rich environments. Duplex 2205 offers higher strength and better resistance to chloride stress corrosion cracking than 316 stainless steel.
Depending on size, seat material, and temperature, some small-bore valves with PEEK seats can handle pressures up to 6000 psig (414 bar).
Duplex 2205 is normally limited to about 300°C in service because of 475°C embrittlement risk above that range; seat material usually sets a lower limit (PEEK 200°C, PTFE 180°C).
Yes, provided they comply with NACE MR0175 / ISO 15156 requirements for hardness, heat treatment, and sour service conditions.
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