

Durable & Reliable: Cast Iron and Ductile Iron Butterfly Valves
In the world of infrastructure and industrial fluid handling, the choice of body material determines the longevity and safety of the entire system. Flowtorq is a premier manufacturer and supplier of high-grade iron valves, specializing in the Cast Iron Butterfly Valve and the Ductile Iron Butterfly Valve.
Our iron valves are the backbone of municipal water works, HVAC systems, and general manufacturing plants worldwide, offering a perfect balance of strength, machinability, and cost-effectiveness.
The Reliability of the Cast Iron Butterfly Valve
Commonly used in low-pressure applications where mechanical shock is minimal, the Cast Iron Butterfly Valve (Grey Iron) is an industry staple. It is highly valued for its excellent damping properties and superior corrosion resistance in soil and wastewater environments.
Why Flowtorq Cast Iron Valves?
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Vibration Damping: The graphite structure in cast iron naturally absorbs system vibrations, protecting connected piping.
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Cost-Efficient Performance: For standard water and air utility lines, cast iron remains the most economical choice without compromising on Flowtorq’s rigorous sealing standards.
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Protective Coatings: As a leading manufacturer, we finish our cast iron bodies with high-build epoxy coatings to prevent external rust and extend service life.
The Strength of the Ductile Iron Butterfly Valve
When your system demands higher pressure ratings or is subject to "water hammer" and thermal expansion, the Ductile Iron Butterfly Valve is the superior engineered solution. Unlike standard iron, ductile iron contains nodular graphite, which allows the metal to bend rather than snap under stress.
Key Advantages of Flowtorq Ductile Iron Valves:
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Superior Tensile Strength: Ductile iron offers nearly double the strength of cast iron, making it suitable for high-pressure industrial cycles.
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Impact Resistance: These valves are designed to withstand mechanical shocks and pressure surges, ensuring safety in volatile pumping environments.
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Weight Efficiency: Because the material is inherently stronger, a ductile iron butterfly valve can often be designed with thinner walls than cast iron, resulting in a lighter valve that is easier to install.
4. Technical Specifications Table
Feature | Industrial Standard | Our Specification |
|---|---|---|
Size Range | 2" to 48" (DN50 - DN1200) | Full range available in stock |
Pressure Class | ASME Class 150 / PN10 / PN16 | Rated up to 232 PSI (16 Bar) |
Body Materials | CI, DI, WCB, CF8M | Ductile Iron GGG40/50 (Standard) |
Seat Material | EPDM / NBR / PTFE | High-Density EPDM (Standard) |
Face-to-Face | API 609 / ISO 5752 | Short & Long pattern available |
Top Flange | ISO 5211 | Universal mounting for easy actuation |
5. Applications and Industry Use-Cases
Our valves are rigorously tested to meet global standards (API, CE, ISO), making them suitable for:
Flowtorq: Your Trusted Manufacturer and Supplier
As an integrated manufacturer, Flowtorq maintains strict quality control from the foundry to the final pressure test. Whether you require a Cast Iron Butterfly Valve for a commercial building or a heavy-duty Ductile Iron Butterfly Valve for a municipal pumping station, we deliver consistent quality.
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Precision Casting: Our state-of-the-art foundry processes ensure uniform wall thickness and zero porosity in every valve body.
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Material Traceability: We provide full material test reports (MTRs) to verify the chemical and mechanical properties of our iron alloys.
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Versatile Seating: Both our cast and ductile iron series can be fitted with EPDM, Nitrile, or PTFE seats to match your specific media requirements.
Flowtorq Engineering India Pvt. Ltd.
60 Ft Road, Fatima nagar - Naigaon, Bhiwandi 421302, MH, India
Phone
+91-7028405198
+91-9028305198
+91-8007405198







