In ventilation, dust collection, and HVAC systems, the media is typically low-pressure air or gas containing dust. For these applications, our Air duct butterfly valve is the most economical and efficient solution. Designed with a lightweight welded steel plate structure, this valve features a large flow area and a thin body profile. The disc is usually a flat plate that remains almost perfectly parallel to the airflow when fully open, resulting in an exceptionally low flow resistance coefficient. The Air duct butterfly valve focuses on regulating airflow or providing a shut-off (with leakage rates typically within 1%), making it a staple for large-diameter ductwork.
As a manufacturer since 1992, we have extensive experience in the metallurgy and construction material sectors. We've supplied countless Air duct butterfly valve units for cement kiln dust removal systems, where we solved the common issue of disc vibration under high air pressure through optimized rib designs. Unlike heavy cast valves, our welded Air duct butterfly valve is lighter, easier to install, and significantly more cost-effective for large diameters (up to DN3000). We can deliver non-standard sizes in as little as 15-20 days, much faster than the industry average, thanks to our large-scale plate rolling and welding capabilities at our 10,000sqm base.
Technical Specifications
Structure: Welded Steel Plate (Q235, SS304)
Size Range: DN100 - DN3000
Pressure Rating: <0.1 MPa (Low Pressure)
Sealing: Metal-to-Metal (Non-tight seal)
Operation: Hand Lever, Worm Gear, Pneumatic, Electric
Application Areas
Mainly used in industrial factory ventilation, mine dust extraction, chemical tail gas collection, and HVAC fresh air systems.
Factory Customization & OEM
We support full customization of the Air duct butterfly valve. Whether you need a square, round, flanged, or butt-weld connection, our engineers can design a solution based on your site measurements or drawings.
Quality Control & Packaging
While these aren't high-pressure valves, we perform full-cycle operation tests to ensure smooth movement. Packaging involves sturdy wooden frames or crates depending on the size to ensure safe transport.
FAQ
Q: Can this achieve a 100% tight seal?
A: Standard Air duct butterfly valve units have a small leakage rate (≤1%). For tight shut-off, we recommend our soft-seated or multi-offset metal-seated series.
Q: What is the max size you can build?
A: We have the facility to manufacture units up to 3000mm in diameter.
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