Triple Eccentric Multi-Layer Metal Hard Seal Butterfly Valve

Overview:

Triple Eccentric Multi-Layer Metal Hard Seal Butterfly Valves are designed to offer superior sealing performance in demanding industrial environments. The triple eccentric structure combined with a multi-layer metal hard seal ensures high reliability, excellent durability, and tight shut-off in high-pressure and high-temperature applications.

Product Features:

1. Triple Eccentric Design:
   • First Eccentricity: The stem is located behind the centerline of the sealing surface, which reduces friction during operation and minimizes wear.
   • Second Eccentricity: The stem is offset from the pipe’s centerline, allowing the valve disc to rotate away from the seat quickly, reducing contact during operation.
   • Third Eccentricity: The sealing surface on the disc and seat is conical, which eliminates friction between the sealing surfaces when the valve is fully opened or closed, ensuring smooth operation and extending the valve’s service life.
2. Multi-Layer Metal Hard Seal:
   • Metal-to-Metal Sealing: The valve utilizes a multi-layer metal hard seal, typically combining stainless steel with graphite or other resilient materials to create a strong, leak-tight seal even under high pressure and temperature.
   • High Durability: The hard-sealed structure is resistant to wear, corrosion, and deformation, making it ideal for aggressive media and extreme conditions.
   • Zero Leakage: The triple eccentric design ensures that the valve achieves zero leakage in both directions, making it suitable for critical applications.
3. Superior Sealing Performance:
   • Bidirectional Sealing: The valve’s metal seal can provide tight shut-off in both directions, ensuring reliability even under fluctuating pressure conditions.
   • High-Pressure Capability: With the triple eccentric mechanism, the valve can withstand high pressures (PN16~PN64), providing excellent performance in heavy-duty industrial systems.
   • High Temperature Resistance: The metal seat design allows the valve to operate in temperatures up to 600°C, making it suitable for steam, oil, and gas applications.
4. Materials of Construction:
   • Body Materials: Available in various materials including carbon steel, stainless steel, and alloy steel, which can be selected based on the media and environmental conditions.
   • Disc and Seat Materials: The disc is usually made from high-strength alloys, while the multi-layer seat incorporates a combination of metals and sealing materials to enhance durability and tightness.
5. Operational Benefits:
   • Low Torque Operation: The triple eccentric structure minimizes friction between the disc and seat, reducing the torque required for operation, which can extend the valve’s lifespan and lower operational costs.
   • Quick Open/Close: Butterfly valves are inherently fast-acting, allowing for quick opening and closing to regulate flow effectively.
   • Maintenance-Friendly: The valve is designed for easy maintenance with replaceable seats and discs, which simplifies servicing and reduces downtime.
6. Applications:
   • Power Generation: Used in high-temperature steam lines and high-pressure systems in power plants.
   • Petrochemical Industry: Ideal for handling corrosive fluids and gases in refineries and chemical plants.
   • Water Treatment: Suitable for use in large-scale water treatment facilities where durability and reliability are essential.
   • Oil & Gas: Widely used in pipelines, gas processing, and offshore applications where leak-tight performance is critical.
   • Pulp and Paper: Used in handling abrasive and slurry media, offering both tight sealing and durability in harsh environments.
7. Pressure and Temperature Ratings:
   • Pressure Rating: Typically designed to handle pressures ranging from PN16 to PN64, but can be customized for higher pressure applications.
   • Temperature Range: The valve can operate within a wide temperature range, depending on the materials used, withstanding up to 600°C for certain models.
8. Connection Types:
   • Flanged Connection: Standard flanged ends provide a secure and leak-tight connection to the pipeline.
   • Wafer or Lug Type: Available in wafer or lug designs for easy installation between pipe flanges, with the lug type providing additional support for pipeline maintenance.

Advantages:

• Exceptional Durability: The triple eccentric design and metal hard seal provide long-term performance with minimal wear, even under extreme conditions.
• Tight Shut-Off: The metal-to-metal seal ensures zero leakage, making it suitable for critical processes that require absolute shut-off.
• Corrosion and Wear Resistance: The use of advanced materials in both the disc and seat enhances the valve’s resistance to corrosion, abrasion, and high temperatures.
• Cost-Effective Operation: Low maintenance requirements and extended service life help reduce overall operating costs.

Conclusion:

Triple Eccentric Multi-Layer Metal Hard Seal Butterfly Valves are engineered to deliver reliable and efficient performance in harsh industrial environments. Their robust design ensures high durability, tight sealing, and excellent flow control, making them suitable for applications involving high pressure, high temperature, and corrosive media. These valves are ideal for industries such as power generation, oil and gas, and petrochemicals, where long-lasting and low-maintenance solutions are essential.