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Triple Eccentric Butterfly Valve With Hard Metal Seal for Abrasive Slurry Applications
Product Spotlights
Engineered for severe service, this Triple Eccentric Butterfly Valve features a hard metal seal (Stellite/Tungsten Carbide) for exceptional abrasion resistance in slurry applications. Its frictionless design ensures bubble-tight sealing, low operating torque, and long service life, reducing maintenance and total cost of ownership. Suitable for high temperatures/pressures and bidirectional flow.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Type:
Triple Eccentric Butterfly Valve
Seal Type:
Hard Metal Seal (e.g., Stellite, Tungsten Carbide)
Primary Application:
Abrasive Slurry and Severe Service
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Type
Triple Eccentric Butterfly Valve
Seal Type
Hard Metal Seal (e.g., Stellite, Tungsten Carbide)
Primary Application
Abrasive Slurry and Severe Service
Body Material
Carbon Steel, Stainless Steel, Duplex Steel
Disc Material
Carbon Steel, Stainless Steel with Hard Coating
Connection Type
Wafer, Lug, Double Flange
Operation
Manual Gear, Electric Actuator, Pneumatic Actuator
Size Range
DN50 to DN2000 (2“ to 80“)
Pressure Rating
PN10 to PN63, Class 150 to Class 300
Design Standard
API 609, ISO 10631, ASME B16.34
As a professional manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing high-performance fluid control solutions. Our Triple Eccentric Butterfly Valve with Hard Metal Seal is engineered specifically to conquer the challenges of abrasive slurry applications, offering unmatched durability and zero leakage performance. Designed for severe service conditions, this valve represents our commitment to delivering reliability where it matters most, helping industries worldwide optimize their process efficiency and minimize maintenance downtime.
The core innovation of this valve lies in its triple eccentric disc design, which eliminates friction between the disc and the seat during operation. This fundamental principle, combined with a precision-machined hard metal sealing surface, ensures a bubble-tight seal and dramatically extends service life even when handling highly abrasive media like mining slurries, fly ash, or wastewater with solids.
Key Features & Technical Advantages:
- Triple Eccentric Geometry: The disc's offset from the seat centerline (radial eccentricity), offset from the pipe centerline (axial eccentricity), and conical seat angle (conical eccentricity) work in unison. This design ensures the disc only contacts the seat at the final moment of closure, eliminating wear from scraping and allowing for a metal-to-metal seal.
- Hard Metal Sealing System: The seat ring is typically overlay welded with wear-resistant alloys such as Stellite or Tungsten Carbide. This creates an extremely hard sealing surface (often 40-60 HRC) that resists abrasion, erosion, and corrosion far better than soft seats like PTFE or rubber.
- Bidirectional Sealing Capability: Unlike many conventional butterfly valves, this design provides reliable sealing against pressure from both flow directions, offering greater flexibility in pipeline design and installation.
- High-Temperature & High-Pressure Suitability: The all-metal construction allows the valve to perform reliably in elevated temperature and pressure conditions where elastomeric seals would fail.
- Low Operating Torque: The frictionless operation principle results in significantly lower operating torque compared to resilient-seated or double eccentric valves. This allows for smaller, more cost-effective actuators and reduces wear on the valve stem and bearings.
- Fire-Safe Design: The metal seat design inherently meets fire-safe requirements, as it does not rely on combustible elastomers for sealing.
Technical Specifications Overview:
| Parameter | Specification / Option |
| Design Standard | API 609, ISO 10631, ASME B16.34 |
| Size Range (Nominal Diameter) | DN50 - DN2000 (2" - 80") |
| Pressure Class | PN10/16/25/40/63, ANSI Class 150/300 |
| Body Material | WCB, CF8, CF8M, CF3M, Duplex 2205, etc. |
| Disc Material | WCB + Hard Coating, 316SS, 316L, Duplex |
| Seat Material | Stellite 6, Tungsten Carbide, Nickel Alloy |
| Stem Material | 17-4PH, 316SS, Monel, Duplex Steel |
| Connection Type | Wafer, Lug, Double Flange (RF, RTJ) |
| Operating Temperature | -29°C to +425°C (-20°F to +800°F) |
| Leakage Rate | API 598 / ISO 5208 Rate A (Bubble-tight) |
Benefits for Your Operation:
- Extended Service Life & Reduced TCO: The exceptional wear resistance translates to longer intervals between maintenance or replacement, significantly lowering your total cost of ownership over the valve's lifecycle.
- Enhanced Process Reliability: Consistent, leak-free performance minimizes unplanned shutdowns and product loss, ensuring smoother and more profitable operations.
- Versatility Across Industries: This valve is an ideal solution for demanding applications in mining & mineral processing (slurry pipelines), power generation (FGD systems, fly ash), chemical processing, pulp & paper, and wastewater treatment.
- Customization Potential: We can tailor material selections, pressure ratings, and actuation packages to meet the specific requirements of your application.
Backed by our ISO9001 quality management system and an annual export value reflecting our global reach, Shanghai Zhibang has established itself as a trusted partner for critical valve applications from North America to Southeast Asia and beyond. Our valves are shipped from major ports like Shanghai and Guangzhou, ensuring timely delivery. Choosing our Triple Eccentric Hard Seal Butterfly Valve means investing in a solution built for longevity and performance in the toughest environments. Contact us today to discuss how this valve can solve your abrasive flow challenges and provide a reliable return on your investment.
Frequently Asked Questions (FAQ):
-
Q: What exactly makes a valve "triple eccentric"?
A: It refers to three distinct offsets in the design: 1) The disc stem axis is offset from the pipe/seat centerline (axial eccentricity). 2) The disc stem axis is offset from the disc centerline (radial eccentricity). 3) The seat sealing surface is conical, angled relative to the pipe centerline. This geometry eliminates friction during operation. -
Q: Can this valve handle both abrasive slurries and corrosive chemicals?
A: Yes, with the appropriate material selection. While the hard seal handles abrasion, the body, disc, and stem materials (like stainless steel 316, duplex, or Hastelloy) can be specified to resist various corrosive media. It's a versatile solution for combined challenges. -
Q: How does the maintenance cycle compare to a standard rubber-seated butterfly valve in slurry service?
A: The difference is significant. A soft-seated valve in abrasive service may require seat replacement frequently—sometimes within months. Our hard metal seal valve can often last for several years in the same service, drastically reducing maintenance frequency and costs. -
Q: Is this valve suitable for throttling or control applications?
A: While primarily designed for on/off service, the triple eccentric design provides a more linear flow characteristic compared to concentric designs. For precise throttling, it is recommended to consult with our engineers to evaluate the specific application and potentially pair it with a high-performance control actuator. -
Q: What types of actuators are compatible with this valve?
A> The valve is designed to be compatible with a wide range of actuators due to its standardized mounting interface (ISO 5211). We can supply or recommend manual gear operators, electric actuators, or pneumatic actuators (double-acting or spring-return) based on your plant's available power and control requirements. -
Q: Do you offer fire-safe certification for this valve?
A> The metal-to-metal seal design is inherently fire-safe, as it does not rely on combustible polymers. Specific fire-test certifications (like API 607, API 6FA) can be provided upon request for applicable projects and standards compliance. -
Q: What is your typical lead time for these valves?
A> Lead times vary based on size, material, and order quantity. Standard configurations in common sizes often have shorter lead times. We recommend contacting our sales team with your specific requirements for an accurate production and delivery schedule. -
Q: Can you provide custom modifications or special coatings?
A> Yes, as a manufacturer, we have the capability to provide custom solutions. This can include special epoxy or rubber linings for additional corrosion/abrasion protection, extended necks for insulation, or modifications to meet unique dimensional requirements.
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1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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