Product Overview
The KOZO Super Duplex Grade 5A Butt-Weld Triple Offset Butterfly Valve is designed for corrosive severe-service piping where a welded-end body, super duplex metallurgy and metal-seated triple-offset geometry are required.
Material Note
ASTM A890 Grade 5A is a cast super duplex stainless-steel grade. It should not be described as forged F53; the exact material designation must match the pressure-containing component form and project specification.
Key Design Features
- ASTM A890 Grade 5A super duplex cast body.
- Triple-offset metal-seat sealing geometry.
- Butt-weld end connection for welded piping systems.
- API 609 design family.
- Class 150 / 300 / 600 configurations.
Technical Specifications
| Valve Type | Butt-Weld Triple Offset Butterfly Valve |
|---|---|
| Body Material | ASTM A890 Grade 5A Super Duplex |
| Size Range | 2 in – 60 in |
| Pressure Classes | ASME Class 150 / 300 / 600 |
| Design Standard | API 609 |
| Butt-Weld Ends | ASME B16.25 |
| Seat | Metal Seat |
| Reference Temperature | -29°C to +425°C, configuration-dependent |
Typical Applications
- Offshore process piping
- Seawater and chloride-containing systems
- Chemical process isolation
- High-integrity welded piping systems
Selection Notes
Welding procedure, heat input and corrosion performance should be controlled carefully for super duplex service. Temperature capability depends on the entire valve design, not the body alloy alone.
How to Specify
Please provide size, class, medium, chloride level, design temperature, exact material grade, weld-end preparation, seat design, actuator and inspection requirements.
