Triple Offset, Metal Seated
Triple Offset Butterfly Valve
Zero-leakage, fire-safe performance for critical isolation in high-temperature service
The triple offset geometry eliminates all rubbing contact between the disc and seat — the disc lifts off cleanly and makes contact only at the final point of closure. Combined with a laminated metal/graphite seat, this delivers bubble-tight shutoff with zero friction wear, certified fire-safe to API 607.
API 609API 607 Fire SafeISO 9001CE PEDSIL 3
Technical Specifications
| Size Range | NPS 2″ – 80″ / DN 50 – 2000 |
| Pressure Rating | Class 150 – 900 / PN 16 – 150 |
| Temperature Range | -196°C to +815°C |
| Body Material | WCB, CF8M, WC6, WC9, Duplex, Inconel® |
| Seat Material | Laminated SS/Graphite (metal-to-metal) |
| End Connection | Wafer, Lug, Double Flanged, Butt-Weld |
| Design Standard | API 609 Category B, ASME B16.34, EN 593 |
| Fire Safe | API 607, API 6FA |
| Testing Standard | API 598, EN 12266-1, ISO 5208 Rate A |
Key Features
- Triple offset cam design — zero seat rubbing, friction-free operation
- Laminated stainless steel/graphite seat for fire-safe certification
- Torque-seated, not position-seated — eliminates operator error
- Bi-directional zero leakage (Class VI shutoff)
- One-piece shaft design with anti-blowout protection
Industry Applications
Refinery FCCU isolationLNG liquefaction trainsCryogenic storageSteam turbine isolationChemical reactor isolation
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