Views: 0 Author: Site Editor Publish Time: 06-05-2026 Origin: Site
Tianjin Worlds Valve Co., Ltd. presents a DN300 (12-inch) double eccentric flanged butterfly valve featuring a ductile iron (GGG40) body and ductile iron eccentric disc, engineered for reliable flow control in medium to large pipeline systems. This valve is equipped with an electric actuator for automated operation, making it ideal for remote control, integration with SCADA systems, and applications requiring frequent cycling or precise positioning.
Valve Type: Double Eccentric (Double Offset) Flanged Butterfly Valve
Body Material: Ductile Iron / Stainless Steel / Aluminum Bronze...
Disc Material: Ductile Iron
Seat Material: Ductile Iron / Stainless Steel / Aluminum Bronze...
Sealing Ring: EPDM, NBR, VITON, FKM, PTFE...
Connection Type: Flanged connection
Size Range: DN50–DN1800
Pressure Rating:
PN10 / PN16 ...
Top Flange: Available in ISO 5211 standard for direct actuator mounting
Customization: All materials, dimensions, and pressure ratings can be modified according to customer requirements
Type: EBF01-TF01--Product Catalog
1. Double Eccentric Design – Reduced Wear & Extended Service Life
The disc offset and shaft offset cause the disc to disengage from the seat immediately upon rotation, eliminating sliding contact. This reduces wear and extends seat and disc lifespan significantly.
The design reduces operating torque by up to 30–50% compared to concentric valves, allowing a smaller, more economical actuator to perform the same work while consuming less energy.
In the open position, the disc and seat have no contact, completely eliminating scuffing and "rubber memory" issues common in conventional soft-seated butterfly valves.
2. Ductile Iron Body & Disc – Robust & Corrosion-Resistant Construction
Both the valve body and disc are cast from ductile iron (GGG40/500-7, ASTM A536 Grade 65-45-12), providing high tensile strength (>400 MPa), excellent impact resistance, and superior ductility compared to gray iron.
The ductile iron eccentric disc ensures stable positioning and positive sealing performance under varying pressure conditions.
Epoxy coating (minimum 250µm, any RAL color available) is applied to all external ferrous surfaces for corrosion protection, meeting standards such as EN 14901 GSK RAL certificate and AWWA C550.
3. Electric Actuator – Precise Remote Automation
The electric actuator enables on/off or modulating control with high positioning accuracy, eliminating the need for compressed air lines. It is particularly well-suited for facilities where pneumatic infrastructure is unavailable or where precise flow regulation is critical.
Electric actuation eliminates the venting of process gases associated with pneumatic actuators, offering an eco-friendly, emission-free solution ideal for clean-room environments, water treatment facilities, and indoor installations.
An integral handwheel with declutch mechanism is provided for manual override during power outages or maintenance operations.
4. Flanged Connections – Secure & Universal Compatibility
Double flanged ends provide rigid, leak-proof bolted connections on both sides, suitable for dead-end service, high-vibration pipelines, and permanent installations.
Flange drilling conforms to international standards: EN 1092-2 PN10/PN16, ANSI B16.5 Class 150, AS 2129, JIS 10K, or other customer-specified standards.
Designed for bidirectional sealing with full-rated pressure capability in both directions; a preferred flow direction arrow is typically marked on the valve body for reference.
5. Low Pressure Drop & Energy Efficiency
The double eccentric disc profile and streamlined body design minimize flow resistance, resulting in low pressure drop and reduced pumping energy consumption.
The disc is securely pinned to the stem with stainless steel pins, ensuring positive torque transmission without slippage over the valve's lifetime.
Available with soft seat (EPDM, NBR, Viton) or metal seat options, depending on media and temperature requirements.
6. Fully Customizable – OEM/ODM Solution
Seat material: EPDM (water, steam), NBR (oil, fuel), Viton (aggressive chemicals, high temperature), or PTFE (high-purity, wide temperature range).
Actuator options: Electric, pneumatic, or manual gearbox.
Top flange conforms to ISO 5211 for direct actuator mounting with standardized bolting patterns.
Pressure rating: PN10, PN16, PN25, Class 150, or custom.
Size range: DN300 described; other sizes from DN100 to DN1800 available.
Coating: Any RAL color or special coating specified by customer.
1. We are a direct China-based OEM/ODM manufacturer, producing valves in our own ISO 9001 certified facility with full in-house engineering support – not only a trading company.
2. Our double eccentric design offers proven advantages in torque reduction, seat longevity, and service life compared to conventional concentric designs.
3. Full documentation – material certificates (mill test reports), pressure test reports, and actuator test reports – is provided with every order.
4. CE, UKCA, WRAS, and ACS certifications are available upon request to meet global market requirements.
5. We offer comprehensive customization: disc material, seat material, actuator brand and control type, flange standard, pressure rating, and coating color – all tailored to your specific project.
We invite you to contact us for a competitive quotation or to arrange a visit to our factory. Our engineering team is ready to discuss your specific media, temperature, pressure, and automation requirements – from on/off electric actuated valves to fully modulating control packages with smart positioners.
