High Pressure Butterfly Valve
High Pressure Butterfly Valve – YONCO Triple Offset Hard Seated Series The YONCO High Pressure Butterfly Valve (D343H / D343W) is a heavy-duty, triple-offset metal-seated valve […]
High Pressure Butterfly Valve – YONCO Triple Offset Hard Seated Series
The YONCO High Pressure Butterfly Valve (D343H / D343W) is a heavy-duty, triple-offset metal-seated valve engineered for critical isolation in severe conditions. Designed to handle extreme pressures up to PN64 (6.4 MPa / Class 400), it is widely utilized in pipelines carrying highly corrosive media, compressed air, coal gas, and high-temperature steam within the metallurgy, power generation, and petrochemical industries.
Core Design Advantages
- Triple Eccentric Structure: The advanced triple-offset design ensures nearly zero friction between the disc and the valve seat during rotation, providing a tight dynamic seal that actually tightens as it closes.
- Laminated Stainless Steel Seal: The sealing ring integrates the durability of a metal hard seal with the resilience of a soft seal, ensuring outstanding, bubble-tight performance in both cryogenic and high-temperature environments.
- Stellite Hard-Faced Seat: The disc sealing surface is overlaid with a Cobalt-based hard alloy (Stellite / 507), offering exceptional wear resistance and a significantly prolonged service life.
- High-Strength Truss Disc: For large-diameter valves, the disc utilizes a truss structure. This maximizes strength to withstand high differential pressure while minimizing fluid resistance and pressure drop.
- Bi-Directional Sealing (Optional): Can be engineered for bi-directional sealing upon request, eliminating flow direction restrictions and simplifying installation layouts.
Technical Specifications
| Parameter | Details & Standards |
|---|---|
| Nominal Diameter (DN) | DN50 – DN4000 (2″ – 160″) |
| Nominal Pressure (PN) | PN25, PN40, PN64 (2.5 MPa – 6.4 MPa) |
| Working Temperature | ≤ 425°C (Depending on media and seal type) |
| Body / Disc Material | WCB (Cast Steel), CF8 (SS304), CF3M (SS316L) |
| Applicable Media | Water, Oil, Coal Gas, Combustible Gas, Nitric/Acetic Acid |
| Design Standard | GB/T 12238-2008 (Compatible with API/EN equivalents) |
Primary Applications
• Metallurgy & Smelting Facilities
• Power Station Steam Lines
• High-Pressure Gas Distribution
• Petrochemical Processing
• Heavy-Duty Chemical Plants
• Municipal High-Rise Water Supply
Heavy-Duty Isolation Solutions by YONCO
When high pressure and extreme temperatures are involved, safety is non-negotiable. YONCO high-pressure butterfly valves undergo rigorous 1.5x strength testing and strict seal testing before leaving the factory. Contact our engineering team for detailed CAD drawings, torque calculations, and automated actuation options (pneumatic/electric).
