Double Flange Butterfly Valve
Strong Connection for Big Pipelines

This double flange butterfly valve is a tough valve for large-diameter pipes. The valve body has flanges on both ends. You bolt it directly to your pipe flanges. This gives a strong and leak-proof connection. Our product works well for high-pressure and large-size pipelines. The disc rotates 90 degrees to open or close. This makes operation quick and simple. We cast the valve body from high-quality ductile iron. We machine the sealing surface with precision tools. Every product we make goes through a pressure test before shipping. We have supplied these valves for water plants, pumping stations, and industrial sites for over seven years. A water utility engineer in the Philippines told us our product made their pipeline upgrade much easier. That feedback confirms our quality.
Reliable Sealing for Water and More
This double flange butterfly valve uses a resilient seat design. The seat material can be EPDM, NBR, or PTFE. EPDM works well for water and mild acids. NBR is best for oils and fuels. PTFE handles strong chemicals and high temperatures. We select the right material for your media. Our product achieves Class VI shut-off. This means zero leakage in both directions. We have tested this on our own valve test bench. The seat is replaceable. When it wears out after many cycles, you change only the seat. You do not need to change the whole valve body. Our product saves you money on long-term maintenance. We also offer different operators. You can choose a handle for small sizes. You can choose a worm gear for large sizes. You can add an electric or pneumatic actuator for remote control.

Built for Water, Wastewater, and Industry
This product serves many applications. City water systems use it for main supply lines. Wastewater plants use it for influent, effluent, and sludge lines. Power plants use it for cooling water loops. Ships use it for ballast and cooling systems. The valve handles temperatures from -40℃ to +180℃. Sizes range from DN50 to DN1200. Pressure ratings are PN10 and PN16. We design to API 609 and BS 5155 standards. The face-to-face dimension follows API 609 Category A. Our double flange butterfly valve gives you a simple, strong, and cost-effective way to control flow in big pipes.
Product Parameters
|
Parameter |
Range |
|
Nominal Diameter |
DN50 ~ DN1200 |
|
Pressure Rating |
PN10 / PN16 |
|
Temperature Range |
-40℃ ~ +180℃ |
|
Connection Type |
Double flange (wafer type optional) |
|
Design Standard |
API 609 / BS 5155 |
|
Face-to-Face |
API 609 Cat A |
|
Leakage Class |
Class VI (bi-directional zero leakage) |
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