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Help CenterTriple Eccentric Marine Butterfly Valve With Metal Hard Seal for DN50 to DN1200 Pipelines
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As a leading manufacturer with ISO 9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing high-performance flow control solutions. Our triple eccentric marine butterfly valve with a metal hard seal is engineered for the most demanding applications, offering exceptional durability and zero leakage in critical pipeline systems from DN50 to DN1200. This valve represents our commitment to quality, combining advanced design with robust materials to ensure long-term reliability and minimal maintenance for our global clientele across diverse markets.
This valve is designed to overcome the limitations of traditional butterfly valves. The triple eccentric geometry ensures that the disc seal contacts the seat only at the final moment of closure, minimizing wear and friction. This, combined with a metal-to-metal hard seal, makes it ideal for high-temperature, high-pressure, and corrosive media applications where resilient seals would fail.
Key Features and Advantages:
- Triple Eccentric Design: The unique offset of the shaft axis eliminates sliding friction between the disc and seat during operation, dramatically extending service life and ensuring bubble-tight shut-off even after thousands of cycles.
- Metal Hard Seal: The seat and disc sealing surfaces are hard-faced with alloys like Stellite or Inconel, providing excellent resistance to erosion, corrosion, and high temperatures up to 600°C (1112°F), far surpassing the capabilities of soft-seated valves.
- Bidirectional Sealing: Engineered to provide reliable sealing against pressure from both flow directions, enhancing system safety and flexibility in complex piping layouts.
- Low Torque Operation: The frictionless design requires significantly lower operating torque compared to double-offset or concentric valves, allowing for the use of smaller, more cost-effective actuators.
- Wide Application Range: Perfect for marine systems (ballast, bilge, fuel oil), power generation, petrochemical, LNG, and other industries handling steam, gases, hydrocarbons, and abrasive slurries.
- Fire-Safe Design: The metal seal construction inherently meets fire-safe requirements, as it maintains sealing integrity even if soft secondary seals are damaged by fire.
Technical Specifications:
| Parameter | Specification / Option |
|---|---|
| Size Range | DN50, DN65, DN80, DN100, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600, DN700, DN800, DN900, DN1000, DN1200 |
| Pressure Rating | PN10, PN16, PN25, PN40, Class 150, Class 300 (Customizable) |
| Temperature Range | -196°C to +600°C (-321°F to +1112°F) depending on materials |
| Body Materials | WCB, LCB, CF8, CF8M, CF3, CF3M, Duplex 2205, Super Duplex 2507 |
| Disc Materials | Stainless Steel 316, 316L, Alloy 20, Monel, Hastelloy |
| Seat Hardfacing | Stellite 6, Inconel 625, Tungsten Carbide |
| End Connection | Wafer, Lug, Double Flange (RF, RTJ) |
| Operation | Lever, Worm Gear, Electric Actuator, Pneumatic Actuator (Optional) |
| Seat Leakage Rate | Meets or exceeds API 598 / ISO 5208 Rate A (Zero Leakage) |
The benefits for your operation are clear. You gain a valve that reduces total cost of ownership through its extended lifespan and minimal maintenance needs. Its reliable performance enhances system safety and uptime, preventing costly shutdowns and leaks. Furthermore, its compatibility with a wide range of media and conditions provides design flexibility and standardization across your fleet or plant.
Established in 2016 and with an annual export value consistently between US$1 Million and US$1.5 Million, Shanghai Zhibang Valve has built a strong reputation for reliability. Our products are shipped globally from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, reaching key markets from North America and Europe to Southeast Asia and Africa. Our ISO 9001 certified manufacturing process guarantees that every triple eccentric valve meets stringent quality standards. Choose a partner committed to engineering excellence and global supply chain efficiency. Contact us today to discuss your specific DN50 to DN1200 pipeline requirements and receive a detailed quotation.
Frequently Asked Questions (FAQ):
-
Q: What makes a "triple eccentric" design different from a standard butterfly valve?
A: A triple eccentric valve has three distinct offsets: the shaft is behind the seat plane, offset from the pipeline centerline, and the seat cone angle is tilted. This geometry ensures the disc lifts away from the seat during opening, eliminating rubbing contact and wear, which is common in standard designs. -
Q: Can this valve be used for both on/off and throttling service?
A: While primarily designed for bubble-tight shut-off (on/off), the triple eccentric design provides a relatively linear flow characteristic, making it suitable for moderate throttling applications, especially when paired with a precision actuator. -
Q: What are the main advantages of a metal hard seal over a soft (elastomeric) seal?
A: Metal hard seals offer superior resistance to high temperatures, corrosion, erosion, and abrasion. They do not degrade over time like rubber or PTFE and provide fire-safe performance, making them essential for critical services where soft seals would fail prematurely. -
Q: Is the valve suitable for cryogenic services?
A: Yes. With appropriate material selection (e.g., stainless steel for the body and disc), extended stems, and special low-temperature packing, this valve design can be configured for cryogenic applications down to -196°C. -
Q: What types of actuators are compatible with this valve?
A: The valve can be fitted with manual levers, worm gear operators, electric actuators, or pneumatic actuators (double-acting or spring-return). The low operating torque of the triple eccentric design allows for a more compact and economical actuator selection. -
Q: Do you offer customized materials or coatings for specific corrosive media?
A: Absolutely. We can provide valves in a wide range of corrosion-resistant alloys like Hastelloy, Monel, or Titanium. Internal and external coatings, such as epoxy or nickel plating, are also available upon request to meet specific environmental or media challenges. -
Q: What standards do your valves comply with?
A> Our valves are designed and manufactured in accordance with international standards such as API 609, ISO 5752, and others. Specific compliance certifications can be provided based on your project requirements. -
Q: What is the typical delivery lead time for an order?
A: Lead time varies based on size, material, and quantity. Standard configurations typically have shorter lead times. We provide accurate delivery schedules upon receipt of your detailed inquiry to ensure timely project integration.
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