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High-Performance Triple-Offset Lug Butterfly Valve Featuring Metal Seat Extended Service Life Zero Leakage
Product Details:
| Place of Origin: | Shanghai, China |
| Brand Name: | VESON |
| Certification: | ISO 9001:2015 SGS |
Payment & Shipping Terms:
| Minimum Order Quantity: | 1 Piece |
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| Price: | USD 150-3500 / Piece |
| Packaging Details: | VESON branded plywood case with shock-proof foam insert, export-grade packaging |
| Delivery Time: | 3-5 working days for stock, 15-25 days for production |
| Payment Terms: | T/T,L/C,PayPal,Western Union |
| Supply Ability: | 3000 Pieces per Month |
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Detail Information |
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| Valve Type: | Triple-Offset Lug Butterfly Valve | Size Range: | DN80 To DN1200 (3" To 48") |
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| Pressure Rating: | ANSI 150lb / 300lb / 600lb | Body Material: | WCB Carbon Steel / CF8M SS316 |
| Disc Material: | CF8M SS316 / Duplex / Inconel | Seat Type: | Laminated Metal / Stellite Hardfaced |
| Operation: | Manual Gear / Pneumatic / Electric Actuator | Fire Safe: | API 607 / ISO 10497 Certified |
| Leakage Class: | Zero Leakage (Class VI) | End Connection: | Lug (ANSI B16.5) |
| Certificate: | ISO 9001:2015, SGS, API 607 | ||
| Highlight: | Triple-Offset Design,Metal Seat Zero Leakage,High-Performance Lug Valve |
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Product Description
High-Performance Triple-Offset Lug Butterfly Valve with Metal Seat
The VESON Triple-Offset High-Performance Lug Butterfly Valve represents the premium tier of butterfly valve technology. The triple-offset design eliminates friction between disc and seat throughout the full stroke, while the metal-to-metal seating delivers zero leakage and fire-safe performance for critical isolation applications in oil and gas, petrochemical, and power generation.
Triple-Offset Explained
| Offset | Function |
| 1st Offset | Shaft positioned behind the seat plane, creating a cam-action seal |
| 2nd Offset | Shaft positioned offset from the bore centerline, enabling full disc clearance |
| 3rd Offset | Conical seat angle geometry, eliminating sliding friction for extended seat life |
Key Features
- Metal-to-Metal Seating: Laminated stainless steel/graphite seat ring provides zero leakage with fire-safe compliance to API 607
- Friction-Free Operation: Triple-offset geometry ensures disc lifts off seat instantly without rubbing, extending seat life to 100,000+ cycles
- High-Temperature Rated: Suitable for temperatures from -196°C (cryogenic) to +800°C with appropriate trim materials
- Bi-Directional Sealing: Full-rated shutoff in both flow directions eliminates installation orientation constraints
- Stellite Hardfacing: Optional Stellite 6 or 21 hardfacing on seat and disc for superior wear resistance in abrasive service
Technical Specifications
| Parameter | Specification |
| Valve Type | Triple-Offset Lug Butterfly Valve |
| Size Range | DN80 to DN1200 (3" to 48") |
| Pressure Rating | ANSI 150lb / 300lb / 600lb |
| Body Material | WCB Carbon Steel / CF8M SS316 |
| Disc Material | CF8M SS316 / Duplex / Inconel |
| Seat Type | Laminated Metal / Stellite Hardfaced |
| Operation | Manual Gear / Pneumatic / Electric Actuator |
| Fire Safe | API 607 / ISO 10497 Compliant |
| Leakage Class | Zero Leakage (Class VI) |
| Operating Temperature | -196°C to +800°C |
| Certificate | ISO 9001:2015, SGS, API 607 |
Target Applications
- Refinery critical isolation valves
- Petrochemical process shutoff
- Steam and thermal oil systems
- Cryogenic LNG and ethylene service
- Power plant main steam isolation
Each valve undergoes factory hydrostatic, pneumatic, and fire-safe type testing. Full PMI, NDE, and functional test documentation provided.
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