Rotary Valve for Bulk Material Handling
Reliable Dust-Tight Rotary Valve for Cement & Powder
Katup Rotary Andal & Kedap Debu
Rotary valves (also called rotary feeders or airlock feeders) are designed to maintain a stable air seal while allowing continuous, dust-free discharge of powders and granules. Widely installed under dust collectors, cyclones, silos, hoppers, and pneumatic conveying lines, they reduce air leakage, stabilize differential pressure, and improve flow accuracy.
These valves are ideal for cement handling systems, fly ash powder transfer, bulk material discharge, and abrasive material handling, including clinker dust, limestone powder, gypsum, and coal dust.
For related equipment, check our Dust Collector Valves and Pneumatic Conveying Components.
Features
✅ High airlock sealing to minimize air leakage and pressure loss
✅ Stable continuous feeding for pneumatic conveying and dust collection systems
✅ Wear-resistant rotor tips suitable for abrasive powders (cement, fly ash, clinker dust)
✅ Multiple rotor types: open-end / closed-end / adjustable tip / scalloped rotor
✅ Flexible drives: gear motor / chain drive / direct drive, optional VFD control
✅ Options for safety & dust control: inspection cover, vent connection, shaft sealing upgrades
✅ Available materials: cast iron, carbon steel, stainless steel (SS304/SS316)
✅ Easy maintenance: quick access, replaceable seals/bearings, service-friendly design
Applications
✅ Baghouse / dust collector discharge (dust-tight airlock under hopper)
✅ Cyclone separator discharge and air balance control
✅ Silo & hopper feeding to screw conveyor / air slide / pneumatic line
✅ Cement plant raw mill, kiln, clinker handling and cement dispatch systems
✅ Power plant fly ash handling and pneumatic transport
✅ Chemical / food powder
For reference, rotary valve airlock principles follow standard industrial airlock design practices as described by Wikipedia.
FAQs About Rotary Airlock Valve
What is a rotary airlock valve used for?
Rotary airlock valves provide dust-free, continuous discharge of powders and granules while maintaining an air seal. They are widely used in cement plants, fly ash terminals, chemical powder systems, and grain handling facilities, ensuring precise flow control and reduced leakage.
What is the difference between a rotary valve and a rotary feeder?
A rotary valve emphasizes air sealing and flow regulation, while a rotary feeder focuses on metering and feeding material. Both devices serve bulk material handling, including cement, fly ash, clinker, and other abrasive powders.
How do I choose the right rotor type for cement or fly ash?
Selection depends on abrasion level, flowability, and sealing requirements. Options include open-end rotors for general discharge, closed-end rotors for better airlock, and adjustable tip or scalloped rotors for precise flow control.
What causes air leakage in a rotary valve and how can it be reduced?
Air leakage usually occurs at rotor-to-housing clearances, worn tips, or shaft seal wear. Use wear-resistant rotor tips, proper clearances, and upgraded packing or air purge seals to maintain stable pressure and reduce dust escape.
Can a rotary airlock valve handle abrasive materials?
Yes. Rotary valves are designed for abrasive powders such as cement, fly ash, clinker dust, and high-silica fly ash. Reinforced housing, wear-resistant rotor tips, and proper maintenance intervals ensure long-term durability.
Which industries benefit most from rotary airlock valves?
Ideal for cement plants, power plants, chemical powder, fertilizer, grain handling, and other bulk material industries. They ensure dust-free, controlled discharge, improve operational stability, and maintain safe pneumatic conveying.
Need a Rotary Valve for Your Powder System?
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