Dust Collector Rotary Valve

Dust collector rotary valve, also called star discharge valve, rotary feeder, air lock, is the ash discharge and air lock device under the baghouse hopper. Rotor blades rotate inside the cylindrical housing, continuously conveying dust from the hopper to the discharge port below, while the clearance between blades and housing forms a seal, preventing gas from communicating between the inside of the dust collector and the outside. It is used as an ash discharge device in dust collection systems, and also for pneumatic conveying system feeding and silo quantitative feeding.

• Air lock function maintains system pressure stability. In negative pressure dust collection systems, rotary valve prevents external air from leaking in through the discharge port, maintaining internal negative pressure; in positive pressure systems, prevents compressed air from leaking from the hopper. Side of the body can be fitted with an equalizing suction port to reduce gas blowout.
• Quantitative continuous discharge, uniform feeding. The gap volume between blades is fixed; each rotation discharges a fixed volume of material. Discharge capacity expressed in "L/r", common specifications from 2 L/r to 16 L/r. Standard speed 24 r/min; discharge speed can be adjusted by changing speed or selecting a frequency converter.
• Material and sealing form optional. Housing material: cast iron, carbon steel, stainless steel. Wear-resistant type rotor blade ends use special wear-resistant material; after wear, can be adjusted to maintain good contact with housing. High-temperature type can convey 280°C material; special type up to 500°C.
• Flange can be square or round. According to dust collector hopper interface shape, flange can be square (A type) or round (B type). Adapts to different hopper connection requirements.
• Wear-resistant rotor optional. For abrasive dust, wear-resistant rotor blade ends can be selected.

• Discharge capacity selected to ash discharge volume requirement
• Housing material: cast iron, carbon steel, stainless steel
• Motor: standard, explosion-proof, speed-regulating, variable frequency
• Flange type: square or round
• High-temperature type customized to material temperature
• Wear-resistant rotor optional
• OEM/ODM: customized to dust collector hopper interface size and ash discharge volume; customer brand on nameplate and packaging

Rotor impeller and housing clearance is checked piece by piece to ensure air lock effect. After reducer assembly, test run records current and speed. Whole unit is sealed tested, confirming no dust leakage. Third-party inspection accepted. The factory has supplied this valve to baghouses, cartridge dust collectors, and pneumatic conveying systems, and uses this field data to match rotor clearance and motor power to ash discharge volume.