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Home > Industrial Equipment & Components > Valve > Butterfly Valve > Zero-Leakage Triple Eccentric Butterfly Valve for API 609 Service, Full Encapsulated Seat, PTFE Seals

Zero-Leakage Triple Eccentric Butterfly Valve for API 609 Service, Full Encapsulated Seat, PTFE Seals

Zero-Leakage Triple Eccentric Butterfly Valve for API 609 Service, Full Encapsulated Seat, PTFE Seals thumbnail-3

Zero-Leakage Triple Eccentric Butterfly Valve for API 609 Service, Full Encapsulated Seat, PTFE Seals thumbnail-4

Zero-Leakage Triple Eccentric Butterfly Valve for API 609 Service, Full Encapsulated Seat, PTFE Seals thumbnail-5

Zero-Leakage Triple Eccentric Butterfly Valve for API 609 Service, Full Encapsulated Seat, PTFE Seals photo-1

Zero-Leakage Triple Eccentric Butterfly Valve for API 609 Service, Full Encapsulated Seat, PTFE Seals photo-2

Zero-Leakage Triple Eccentric Butterfly Valve for API 609 Service, Full Encapsulated Seat, PTFE Seals photo-3

Zero-Leakage Triple Eccentric Butterfly Valve for API 609 Service, Full Encapsulated Seat, PTFE Seals photo-4

Zero-Leakage Triple Eccentric Butterfly Valve for API 609 Service, Full Encapsulated Seat, PTFE Seals photo-5

Product Spotlights

API 609 compliant triple eccentric butterfly valve featuring a zero-leakage, full encapsulated PTFE seat design. Eliminates seat wear through frictionless operation, ensuring long-term reliability and bubble-tight shutoff for critical services in oil & gas, chemical, and power industries. Reduces maintenance costs and enhances system safety.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Application:

Other, Oil & Gas

Valve Type:

Triple Eccentric Butterfly Valve

Leakage Standard:

Zero-Leakage

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Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
Company Profile
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Application Other, Oil & Gas

Valve Type Triple Eccentric Butterfly Valve

Leakage Standard Zero-Leakage

Service Standard API 609

Seat Design Full Encapsulated Seat

Seal Material PTFE (Polytetrafluoroethylene)

Body Material Carbon Steel, Stainless Steel, Duplex Steel

Size Range 2 inch to 48 inch (DN50 to DN1200)

Pressure Rating Class 150 to Class 600

Operation Lever, Gear, Electric Actuator, Pneumatic Actuator

As a professional manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our high-performance Zero-Leakage Triple Eccentric Butterfly Valve designed for API 609 service. Engineered for critical applications where reliability is non-negotiable, this valve combines advanced sealing technology with robust construction to deliver exceptional shut-off performance and long service life. Our extensive experience since 2016, serving markets from North America to Southeast Asia, ensures that every valve meets the stringent demands of global industries.

Core Product Features & Technical Advantages:

Triple Eccentric Design: The unique geometry of the disc offset from the seat centerline eliminates sliding friction during operation. This design ensures minimal wear on the seat and disc, contributing directly to the valve's zero-leakage capability and extended maintenance intervals.
Full Encapsulated Seat: The seat is fully encapsulated within the valve body, protecting it from direct line media flow and potential erosion. This construction provides superior structural integrity and prevents seat blow-out under high pressure or pressure cycling conditions.
Premium PTFE Seals: Utilizing high-grade Polytetrafluoroethylene (PTFE) for the primary seals offers excellent chemical resistance across a wide temperature range. PTFE's low friction coefficient and non-stick properties further enhance the valve's smooth operation and reliable sealing.
API 609 Compliance: Manufactured in accordance with API Standard 609 for butterfly valves, this product is suitable for a broad spectrum of services in the petroleum, petrochemical, and natural gas industries, including general service, hydrocarbon service, and fire-safe applications.
Robust Construction & Materials: Available in a variety of body materials like carbon steel, stainless steel (304/316), and duplex steel to suit different corrosive environments and pressure ratings from Class 150 to Class 600.
Versatile Actuation Options: The valve can be supplied with manual lever operation, gear operators, or automated with electric and pneumatic actuators, allowing for seamless integration into both manual and automated control systems.

Detailed Technical Specifications:

Parameter	Specification
Design Standard	API 609, ASME B16.34
Size Range	2" to 48" (DN50 to DN1200)
Pressure Rating	Class 150, 300, 600 (ANSI)
Temperature Range	-20°C to 200°C (-4°F to 392°F) with standard PTFE seat/seal
Leakage Class	Zero-Leakage (Bidirectional, Metal-to-Metal Sealing Assist)
End Connection	Wafer, Lug, Double Flange
Face-to-Face	Per API 609 / ISO 5752
Fire Safe Design	Optional, per API 607/API 6FA

Benefits for Your Operations:

Enhanced System Integrity: The zero-leakage performance ensures no product loss, maintains system pressure, and prevents environmental contamination or safety hazards.
Reduced Total Cost of Ownership: The triple eccentric design and encapsulated seat drastically reduce maintenance frequency and part replacement costs, offering significant long-term savings.
High Reliability in Demanding Services: Ideal for handling volatile, toxic, or expensive fluids in oil & gas, chemical, and power generation applications where failure is not an option.
Operational Flexibility: Suitable for both isolation and throttling services with excellent flow characteristics and low torque requirements, especially when automated.

Backed by our ISO9001-certified quality management system and an annual export value reflecting consistent global demand, Shanghai Zhibang's Triple Eccentric Butterfly Valve represents a reliable investment for your critical piping systems. Our established supply chain from major Chinese ports like Shanghai and Guangzhou ensures timely delivery worldwide. Choose a valve engineered for performance and durability. Contact us today for a detailed quotation or to discuss your specific application requirements.

Frequently Asked Questions (FAQ)

Q: What exactly does "Zero-Leakage" mean for this butterfly valve?
A: "Zero-Leakage" refers to the valve's ability to achieve bubble-tight shut-off in both flow directions, meeting or exceeding stringent industry standards for seat leakage. This is accomplished through the combination of the triple eccentric geometry and the precise interference fit between the disc and the encapsulated PTFE seat.
Q: Is this valve suitable for high-temperature applications above 200°C?
A: The standard valve with PTFE seals is rated for temperatures up to 200°C. For higher temperature services, alternative seat materials such as reinforced PTFE composites or metal-seated designs are available upon request.
Q: Can this valve be used for both isolation and flow control (throttling)?
A: Yes. While its primary strength is as a tight-shutoff isolation valve, the triple eccentric design provides a relatively linear flow characteristic, making it suitable for moderate throttling duties. For precise control, pairing it with a high-quality modulating actuator is recommended.
Q: What are the main differences between a triple eccentric butterfly valve and a standard (centric or double eccentric) one?
A: The triple eccentric design introduces a conical seat surface angle. This eliminates rubbing contact between the disc and seat during the entire 90-degree rotation, drastically reducing wear and enabling the use of metal seat rings or harder seal materials for zero-leakage performance, which standard designs cannot achieve.
Q: Does the "Full Encapsulated Seat" design require special maintenance?
A: No, it reduces maintenance. By being fully encapsulated and protected from direct flow impingement, the seat is less prone to erosion and damage. It is also not a pressed-in or bonded seat that can become loose, enhancing long-term reliability with minimal upkeep.
Q: Are fire-safe versions of this valve available?
A: Yes, fire-safe design is a popular optional feature. These valves incorporate secondary metal seals that engage to maintain sealing integrity in the event of a fire that destroys the primary PTFE seals, complying with standards like API 607/6FA.
Q: What actuation options do you offer, and can you supply the complete assembly?
A> We provide a full range of actuation solutions: manual lever handles, gear operators, electric actuators, and pneumatic actuators (double-acting or spring-return). We can supply the valve as a complete, tested assembly ready for installation.
Q: What is your typical lead time and packaging for export?
A> Lead times vary based on size, material, and order quantity but are generally competitive. Valves are securely packaged in wooden crates suitable for ocean freight, with all parts protected against corrosion, ensuring they arrive in perfect condition.