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Home > Industrial Equipment & Components > Valve > Butterfly Valve > API 609 Standard Compliant Double Eccentric Butterfly Valve With Mill Test Report

API 609 Standard Compliant Double Eccentric Butterfly Valve With Mill Test Report

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API 609 Standard Compliant Double Eccentric Butterfly Valve With Mill Test Report photo-4

API 609 Standard Compliant Double Eccentric Butterfly Valve With Mill Test Report photo-5

Product Spotlights

API 609 compliant double eccentric butterfly valve designed for high-performance isolation. Features reduced seat wear and low operating torque for long service life and lower costs. Available in various materials (carbon steel, stainless, duplex) and seat types (resilient/metal) for diverse applications. Each valve comes with a Mill Test Report for material traceability and quality assurance. Manufactured in an ISO9001-certified facility with global export experience.

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

Key Specifications

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Standard:

API 609 Standard Compliant

Type:

Double Eccentric Butterfly Valve

Body Material:

Carbon Steel, Stainless Steel, Duplex Steel

Contact Supplier Request Quote Chat Now

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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Standard API 609 Standard Compliant

Type Double Eccentric Butterfly Valve

Body Material Carbon Steel, Stainless Steel, Duplex Steel

Disc Material Stainless Steel, Duplex Steel

Seat Material PTFE, EPDM, NBR, Metal Seat Optional

End Connection Wafer, Lug, Double Flanged

Size Range DN50 to DN1200 (2“ to 48“)

Pressure Rating PN10 to PN63, Class 150 to Class 600

Operation Manual Gear, Electric Actuator, Pneumatic Actuator

Test Report Mill Test Report Provided

As a professional manufacturer with ISO9001-certified quality management systems, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our high-performance API 609 Standard Compliant Double Eccentric Butterfly Valve. Engineered for demanding industrial applications, this valve offers superior sealing performance, exceptional durability, and reliable operation under high-pressure and high-temperature conditions. We combine precision manufacturing with stringent quality control to deliver a product that meets the exacting requirements of global markets, from oil & gas to power generation.

Our valve is designed to provide a long service life and minimal maintenance, translating into significant cost savings for your operations. Each valve is backed by a comprehensive Mill Test Report (MTR), providing full traceability and verification of material properties and performance, ensuring you receive a product of certified quality and integrity.

The core advantage of the double eccentric (double-offset) design lies in its ability to drastically reduce wear on the seat. Unlike a concentric valve, the disc's axis is offset from both the seat's centerline and the valve body's centerline. This creates a camming action during the 90-degree rotation:

Minimized Friction: The disc lifts away from the seat immediately upon opening, eliminating constant scraping and dramatically extending seat life.
Bubble-Tight Shut-off: The disc seals tightly against the seat only at the point of full closure, ensuring reliable, leak-proof performance even after thousands of cycles.
Lower Operating Torque: Reduced friction means lower operating torque, allowing for smaller, more cost-effective actuators.

Key Features & Technical Specifications:

Feature	Description
Design Standard	Complies with API 609 standard for butterfly valves, ensuring design integrity for critical service.
Body & Disc Materials	Available in carbon steel (WCB), stainless steel (CF8M/316), duplex steel, and other alloys to suit corrosive or high-strength applications.
Seat Options	Standard resilient seats (PTFE, EPDM, NBR) for general service. Metal seat configurations are available for high-temperature (exceeding 400°C/752°F) or abrasive media.
Pressure & Temperature Range	Rated from PN10 to PN63 (Class 150 to Class 600). Temperature range depends on seat material: -20°C to 200°C for elastomers, up to 600°C+ for metal seats.
End Connections	Wafer, lug, and double flanged designs to fit various piping system requirements.
Actuation	Manual lever, manual gearbox, electric actuator, or pneumatic actuator. Actuators can be sourced and fitted upon request.

Benefits for Your Operation:

Enhanced Reliability: The API 609 compliant design ensures robust construction suitable for critical isolation duties in oil, gas, chemical, and power plants.
Reduced Lifetime Cost: Extended seat and disc life, coupled with lower operating torque, lead to reduced maintenance and replacement costs.
Versatile Application: Suitable for a wide range of media including water, oil, gas, steam, and corrosive chemicals, depending on material selection.
Full Documentation: The provided Mill Test Report offers peace of mind, confirming chemical composition, mechanical properties, and non-destructive testing results.
Global Compliance: Manufactured in an ISO9001 facility, our processes ensure consistent quality, making our valves a trusted choice for projects worldwide.

With an annual export value between US$1 Million and US$1.5 Million and a strong presence across North America, South America, Europe, Asia, Africa, and Oceania, Shanghai Zhibang has proven its capability to meet diverse international standards and client expectations. Our strategic location with multiple ports of shipment (Shanghai, Guangzhou, Hong Kong, Beijing) ensures efficient and flexible logistics. Choose our API 609 Double Eccentric Butterfly Valve for a balance of performance, durability, and verified quality. Contact us today to discuss your specific requirements and receive a detailed quotation.

Frequently Asked Questions (FAQ)

What is the main difference between a double eccentric and a single eccentric butterfly valve?
A single eccentric (single-offset) valve has the stem offset only from the centerline of the seat. A double eccentric valve has the stem offset from both the seat centerline and the valve body centerline. This double offset further reduces friction and wear, offering better sealing performance and longer life, especially for higher pressure/temperature applications.
Does compliance with API 609 guarantee a certain pressure rating?
API 609 is a design and manufacturing standard, not a pressure rating itself. Valves compliant with API 609 are designed to meet specific pressure class ratings (like Class 150, 300, 600) as defined by ASME B16.34. The valve's nameplate will indicate its specific pressure class.
What is included in the Mill Test Report (MTR)?
The MTR is a certificate from the material mill. It typically includes the heat number, chemical composition analysis, mechanical property test results (yield strength, tensile strength, elongation), and often results of non-destructive tests like ultrasonic or hydrostatic tests, providing full material traceability.
Can this valve be used for throttling or flow control?
While primarily designed for isolation (on/off service), the double eccentric design offers improved flow characteristics over concentric valves. It can be used for moderate throttling, but for precise control over a wide range, a triple eccentric or control valve is recommended.
Are these valves suitable for cryogenic service?
Yes, with proper material selection (e.g., stainless steel) and appropriate low-temperature seat materials (special PTFE compounds), these valves can be configured for cryogenic applications. This requires specific engineering consultation.
What is the typical delivery lead time?
Lead time depends on size, material, and quantity. Standard configurations are often available from stock or have shorter lead times (4-8 weeks). Customized orders (special materials, actuators) may require 8-12 weeks. We provide accurate lead times with every quotation.
Do you provide valves with actuators pre-mounted?
Yes, we offer comprehensive actuation solutions. We can source and mount electric or pneumatic actuators to the valve, perform necessary setup, and deliver a fully assembled, ready-to-install unit, which saves you time and ensures compatibility.
What after-sales support do you provide?
We provide technical documentation, installation manuals, and spare parts lists. For critical issues, remote technical support is available. We also stock common spare parts like seals and gaskets for prompt supply.