Triple Offset Wafer Butterfly Valve
Triple Offset Wafer Butterfly Valve – YONCO PN10 to PN40 The YONCO Triple Offset Wafer Butterfly Valve (D373H / D373Y) is a high-performance flow control and […]
Triple Offset Wafer Butterfly Valve – YONCO PN10 to PN40
The YONCO Triple Offset Wafer Butterfly Valve (D373H / D373Y) is a high-performance flow control and isolation valve engineered with a precision J-shaped elastic sealing ring and an advanced triple eccentric multi-level metal hard seal structure. Designed to operate flawlessly in high-temperature environments up to 425°C, this wafer-style valve is extensively utilized across metallurgy, power generation, petrochemicals, and municipal water systems. It excels in both precise flow regulation and absolute fluid cut-off, offering unmatched durability and bi-directional shut-off capabilities for critical pipelines.
Core Features & Advantages
- Triple Eccentric Structure: The advanced triple offset design ensures virtually zero friction between the valve seat and the disc during operation, resulting in a torque-seated “tighter-as-it-closes” wedge effect for bubble-tight sealing.
- Dual-Sealing Technology: The sealing ring is crafted from premium stainless steel, combining the resilience of an elastic seal with the robustness of a metal hard seal. It guarantees outstanding performance and corrosion resistance across extreme high and low-temperature fluctuations.
- Wear-Resistant Hard Facing: The disc sealing surface is hard-faced with Stellite (cobalt-based cemented carbide), delivering superior resistance to erosion, galling, and abrasion to significantly extend the valve’s service life.
- Optimized Flow Dynamics: Large-diameter butterfly discs utilize a high-strength truss structure to maximize the flow area and minimize fluid resistance, ensuring high flow capacity and efficiency.
- Bi-Directional Zero Leakage: Features true bi-directional sealing functionality, allowing for flexible installation in any spatial orientation regardless of the pipeline’s medium flow direction.
Standards & Technical Specifications
| Category | Applicable Standard & Details |
|---|---|
| Product Models | D373H, D373Y |
| Nominal Pressure (PN) | 1.0, 1.6, 2.5, 4.0 MPa (PN10 – PN40) |
| Size Range | DN50 – DN1000 |
| Working Temperature | ≤ 300°C / ≤ 425°C (Depending on body material) |
| Body & Disc Materials | Cast Steel (C), Austenitic Stainless Steel (P/R) |
| Stem Material | 40Cr Alloy Steel, Austenitic Stainless Steel |
| Sealing Pair Materials | Stainless Steel / Stainless Steel, Stainless Steel / Stellite |
| Applicable Mediums | Water, Steam, Oil Products, Industrial Fluids |
Primary Applications
• Metallurgical Processing
• Thermal Power Generation
• Petrochemical & Refining
• Municipal Water Supply & Drainage
• Industrial Steam Networks
• Heavy-Duty Fluid Regulation
High-Performance Butterfly Valves by YONCO
When precision flow control and extreme durability are required, rely on YONCO. Our triple offset wafer butterfly valves undergo rigorous testing to ensure bi-directional zero leakage and absolute structural integrity under demanding high-temperature conditions. We offer complete customization on body materials (from carbon steel to austenitic stainless steel) and tailored actuation solutions (multi-position manual, pneumatic, electric). Contact our sales engineers today to specify the exact trim and pressure rating for your critical pipeline.
