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Help CenterAPI 609 Metal Seat Double Eccentric Butterfly Valve for Class150-Class300 Service
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As a professional manufacturer with years of experience in industrial valve production, Shanghai Zhibang Valve is proud to present our high-performance API 609 Metal Seat Double Eccentric Butterfly Valve. Designed specifically for demanding Class 150 to Class 300 service in critical industries, this valve combines robust engineering with reliable sealing technology. Our commitment to quality, backed by ISO9001 certification, ensures that each valve meets the stringent requirements for safety and longevity in your operations. We understand the challenges of high-pressure and high-temperature applications, and this product is engineered to provide a dependable, low-maintenance solution for your most challenging process control needs.
The core of this valve's performance lies in its double eccentric (double offset) design. This advanced geometry minimizes wear and friction between the disc and seat, significantly extending service life compared to conventional concentric butterfly valves. The metal-to-metal seat provides exceptional sealing integrity, especially in high-temperature environments where elastomeric seats would degrade. This makes it an ideal choice for applications involving steam, hot oils, and other aggressive media.
Key Technical Features & Advantages:
- Superior Sealing Performance: The precision-machined metal seat and disc create a bubble-tight seal, ensuring zero leakage for enhanced safety and environmental protection.
- Reduced Operating Torque: The double offset design dramatically lowers the torque required to operate the valve, allowing for smaller, more cost-effective actuators and reducing wear on the stem and bearings.
- Extended Service Life: By eliminating constant contact between the disc and seat during opening and closing, the design prevents premature wear, leading to lower total cost of ownership.
- High-Temperature & Pressure Capability: Engineered to withstand the rigors of Class 300 service, the valve is suitable for a wide range of pressures and temperatures where soft-seated valves would fail.
- Bi-Directional Flow Capability: The robust seat design provides reliable sealing against flow from either direction, offering greater flexibility in piping system design.
- Versatile Material Options: Available in various body, disc, and seat material combinations (e.g., carbon steel with stainless steel trim, full stainless steel, or duplex steel) to match specific corrosion and erosion requirements.
The valve is constructed to comply with API 609 standards, which govern the design, materials, testing, and inspection of butterfly valves for critical refinery service. This ensures interchangeability, reliability, and a known level of quality for engineers and operators.
Typical Technical Specifications:
| Parameter | Specification |
| Design Standard | API 609 |
| Pressure Class | ASME B16.34 Class 150, 200, 300 |
| Temperature Range | -29°C to 425°C (-20°F to 800°F) depending on materials |
| End Connection | Wafer, Lug, Double Flanged (RF or RTJ) |
| Face-to-Face | Per API 609 / ISO 5752 |
| Leakage Class | Metal Seat: API 598 / ISO 5208 Rate A |
| Operation | Manual Lever, Gearbox, Electric or Pneumatic Actuator |
Benefits for Your Operation:
- Enhanced Safety: Reliable shut-off in critical services reduces the risk of leaks and process incidents.
- Reduced Maintenance Costs: The durable metal seat and low-wear design lead to fewer replacements and less downtime.
- Operational Efficiency: Low operating torque translates to energy savings and smoother control.
- System Flexibility: Suitable for isolation, throttling, and bi-directional service, simplifying inventory and application.
- Long-Term Value: A higher initial investment is offset by a significantly longer lifecycle and lower total cost compared to valves requiring frequent seat replacement.
Frequently Asked Questions (FAQ):
-
Q: What is the main advantage of a double eccentric design over a single eccentric one?
A: The double eccentric (double offset) design provides two points of offset: one from the pipeline centerline and one from the seat centerline. This creates a cam-like action that completely lifts the disc off the seat within the first few degrees of rotation, eliminating sliding contact and drastically reducing wear and operating torque. -
Q: Can this valve be used for throttling control?
A: Yes, the double eccentric design offers a relatively linear flow characteristic, making it suitable for moderate throttling duties. However, for precise control over a wide range, the specific disc profile and actuator selection should be evaluated. -
Q: How does the metal seat perform compared to a soft (elastomer) seat?
A: Metal seats excel in high-temperature, abrasive, or corrosive services where soft seats would melt, harden, or erode. They offer a longer life in these conditions but may have a slightly higher leakage rate (typically Class IV or better per API 598) compared to the bubble-tight seal of a new soft seat. -
Q: What types of actuators are compatible?
A: The valve is designed with a standardized mounting pad compatible with most major brands of electric, pneumatic, and hydraulic actuators. We can supply the valve as a manual unit or provide a complete actuated package. -
Q: Is fire-safe design available?
A: Fire-safe versions are available upon request. These designs include secondary metal sealing surfaces that engage to provide a seal in the event a primary soft seal (if present) is destroyed by fire, meeting standards like API 607 or API 6FA. -
Q: What is the typical delivery time?
A: For standard material configurations in common sizes, delivery can be within 4-8 weeks. Lead times for special materials or larger sizes may vary and can be confirmed upon inquiry. -
Q: Do you provide test reports?
A> Yes, each valve undergoes rigorous testing, including shell test, seat test, and operational checks. Certified test reports (e.g., API 598) are available and provided with the shipment. -
Q: Can you customize the valve for specific project requirements?
A: We offer customization options including special material trims, extended stems for insulation, locking devices, limit switches, positioners, and specific paint requirements. Please provide your technical specifications for a tailored quotation.
Trust in a manufacturer with a proven track record. Since our establishment in 2016, Shanghai Zhibang Valve has built a reputation for quality and reliability, exporting our products to markets across North and South America, Europe, Asia, Africa, and Oceania. Our ISO9001 certified quality management system governs every step of production, from material sourcing to final testing. We invite you to experience the durability and performance of our API 609 Metal Seat Butterfly Valves. Contact us today to discuss your project specifications, request a detailed quotation, or learn more about how our valves can provide a reliable, long-term solution for your high-pressure and high-temperature applications. Our team is ready to support your engineering and procurement needs.
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