Rotary Airlock Valve for Bulk Material Handling
(Katup Rotary untuk Pengeluaran Serbuk dan Material Curah)
Airlock feeder for dust-free discharge and precise flow regulation
Overview
Rotary Airlock Valve (also called Rotary Feeder / Rotary Valve / Airlock Feeder) is designed to maintain stable airlock sealing between upstream and downstream equipment, enabling continuous, dust-free discharge of powders and granules. It is widely installed under baghouse dust collectors, cyclones, silos, hoppers, and pneumatic conveying lines to reduce air leakage, stabilize differential pressure, and improve material flow accuracy.
Typical handled materials include cement, fly ash, clinker dust, limestone powder, gypsum, coal powder, and other abrasive bulk solids. For different process conditions, LVRUI can provide cast iron / carbon steel / stainless steel housings, as well as multiple rotor designs and drive options.
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?
A rotary airlock valve is used to discharge powder continuously while maintaining an air seal between two pressure zones. It is commonly installed under dust collectors, cyclones, silos, and hoppers to prevent air leakage and support stable pneumatic conveying.
Rotary valve vs rotary feeder—are they the same?
In most industries, rotary valve, rotary feeder, and airlock feeder refer to the same device. The naming depends on whether the focus is air sealing (airlock) or metering/feeding (feeder).
How do I choose the right rotor type for cement or fly ash?
For cement and fly ash, selection depends on abrasion level, flowability, and required sealing. Common options include open-end rotors for general discharge and closed-end / adjustable tip rotors when better airlock sealing is needed.
What causes air leakage and how to reduce it?
Air leakage usually comes from rotor-to-housing clearance, worn tips, or shaft seal wear. Using wear-resistant tips, proper clearance, and upgraded sealing (packing/air purge seal) helps maintain stable pressure and reduce dust escape.
Can a rotary airlock valve handle abrasive materials like clinker dust?
Yes. For abrasive powders such as clinker dust or high-silica fly ash, use wear-resistant rotor design, suitable housing material, and proper maintenance intervals to extend service life.
Need a Rotary Airlock Valve for Your Powder System?
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