Concentric (Resilient seated) Double Flange Butterfly Valve
Double Offset Double Flange Butterfly Valves
Triple Offset Double Flange Butterfly Valves
PTFE Lined Double Flanged Butterfly Valve
AL Bronze Double Eccentric Double Flanged Butterfly Valve 
Pneumatic Actuated Double Flanged Butterfly ValveDouble Flange Butterfly Valves manufactured by C-Way Engineering Exports are designed for secure installation in medium to large diameter pipeline systems requiring rigid flange connections and high structural stability. With flanged ends integrated into the valve body, this design ensures precise alignment, improved load distribution, and reliable performance in demanding industrial environments.
Engineered to meet international standards ANSI/API/ASTM, DIN/EN, BS,JIS and ISO standards, our double flange butterfly valves are suitable for water treatment plants, power stations, oil & gas utilities, and large-scale industrial projects worldwide.
A Double Flange Butterfly Valve is designed with integral flanges on both ends of the valve body, enabling direct installation between pipeline flanges using standard bolting. This construction provides a rigid and stable connection, making it highly suitable for medium to large diameter pipeline systems.
Compared to wafer type butterfly valve and lug type butterfly valve configurations, the double flanged design offers improved structural integrity, accurate alignment, and better load distribution, especially in high-flow and high-pressure applications.
Key Technical Advantages:
Double Flange Butterfly Valves are widely used in municipal water distribution, power plant cooling systems, industrial process lines, and oil & gas utilities, where durability and consistent performance are critical.
| Integral Flanged Body | Heavy-duty body with precision-machined flanged ends ensures proper alignment and long-term durability in large pipelines |
| Disc Design | Available in stainless steel SS304, SS316, aluminum bronze, duplex stainless steel, or nickel-plated ductile iron. PTFE coated disc options are available for corrosive applications. |
| Seat Configuration | Multiple seating options are available depending on service conditions:
|
| Stem & Shaft | Blow-out proof stem construction with corrosion-resistant materials and low-friction bushings ensures smooth and reliable operation |
| Parameter | Specification |
|---|---|
| Valve Type | Double Flange Butterfly Valve |
| Available Designs | Concentric (Resilient Seated), Double Offset, Triple Offset |
| Size Range | DN80–DN2000 / NPS 3”–80”” |
| ANSI Pressure Rating | Class 125 / 150 (Concentric) ; Class 150 / 300 (Double Offset) ; Class 150 / 300 / 600 (Triple Offset) Higher ratings up to Class 900 / 1500 available on request |
| DIN / EN Rating | PN10 / PN16 (Concentric) ; PN16 / PN25 / PN40 (Double Offset) ; PN25 / PN40 / PN63 (Triple Offset) Higher ratings up to PN100 / PN160 available on request |
| Manufacturing Standards | Manufactured in accordance with ANSI / API / ASTM, DIN / EN, ISO standards |
| Design Standards | API 609, MSS SP-67 (ANSI/API) ; EN 593 (DIN/EN) ; BS EN Series ; JIS B Standards ; ISO Standards |
| Face to Face | API 609 ; EN 558 Series 13 ; ISO 5752 ; BS EN 558 ; JIS Standards |
| Testing & Inspection Standards | API 598 ; EN 12266-1 ; ISO 5208 ; BS EN 12266 ; JIS B 2003 |
| Flange Standard | ANSI B16.5 / ASME B16.47 / EN 1092-1 |
| Mounting Standard | ISO 5211 Direct Mount |
| Temperature Range* | -20°C to +120°C (Soft Seat) ; up to +350°C (Double Offset) ; up to +550°C (Triple Offset) |
| Operation | Gear Operated, Pneumatic Actuated, Electric Actuated |
| Component | Available Materials |
|---|---|
| Body | Ductile Iron (GGG40 / GGG50), ASTM A216 WCB, ASTM A351 CF8 / CF8M,Aluminum Bronze (C95400 / C95800) |
| Disc | SS304, SS316, Aluminum Bronze, Duplex SS |
| Stem / Shaft | SS410, SS316, Duplex SS, 17-4 PH |
| Seat – Soft | EPDM, NBR, Viton |
| Seat – Chemical | PTFE, RPTFE |
| Seat – Metal | Stainless Steel with Graphite / Hardfaced |
| Bushings | PTFE Coated, Graphite Impregnated |
| Fasteners | Carbon Steel Zinc Plated, SS304, SS316 |
While both valves fit between flanges, the Lug Type offers two critical advantages:
They are typically available in PN10, PN16, PN25, PN40 and ANSI Class 150, 300, and 600, with higher ratings available for triple offset designs.
These valves are widely used in municipal water systems, power plants, cooling water lines, oil & gas utilities, and large industrial pipelines.
Common materials include ductile iron, carbon steel (WCB), stainless steel, and aluminum bronze, selected based on application requirements.
Yes, they are specifically designed for large diameter applications (up to DN2000 and above) where stability and strength are critical.
Yes, they are available with gear operators, pneumatic actuators, and electric actuators, making them suitable for automated flow control systems.
With decades of experience in the industry, 'C-Way Engineering Exports’ witnessed the critical importance of utilizing high-quality Pipes & Tubes that meet international standards. Whether you are in Oil and Gas, petrochemical, power generation, or any other industry relying on efficient and reliable piping systems, investing in high quality valves is essential.
Don't compromise on safety, performance, or longevity. Partner with trusted suppliers like us ‘C-Way Engineering Exports’, who prioritize quality and adherence to standards, ensuring your projects are built to last.
Contact us today to explore our full range of industrial valves, pipe fittings, pipes & tubes, flanges and experience the excellence of our products and how we can support your piping needs with our expertise and premium-grade valves. Let's build a robust infrastructure together.
We are here to help you!
+91 9391116127
sales@cwayexports.com
