The Series T High Performance Triple Offset Butterfly Valve is engineered for durability, consistent performance, and ease of automation, manufactured under international standards including API 609, EN 593, and MSS SP-68. Every valve is 100% pressure tested and fully serialized prior to shipment.
- Triple offset geometry with three unique offsets ensures zero-leakage, torque-seated shutoff with minimal wear and friction-free closure
- Cam-action closing eliminates seat-to-disc rubbing, extending sealing life and reducing operating torque compared to double and concentric designs
- Available in monolithic wafer, lug, or double-flanged construction for Class 150 to Class 600 pressure ratings
- One-piece stem drives the disc assembly for precise seating of the laminated seal ring against the hard-faced weld-overlay body seat
- Laminated or metallic seat configurations available — both fully field-replaceable without modifying the retainer ring, reducing downtime and maintenance costs
- Live-loaded retainer ring with disc springs ensures consistent sealing force and compensates for thermal expansion/contraction in extreme conditions
- Blow-out resistant stem with snap ring retention system prevents stem ejection under pressure
- Live-loaded packing system with Belleville washers suitable for fugitive emission, high-temperature, high-cycle, and fire-safe services
- Bolted thrust bearing absorbs axial loads for stable, smooth valve operation
- Suitable for high-temperature, cryogenic, and severe service applications with reliable bi-directional dead-end service capability
