Star Discharge Valve

Star discharge valve, also called rotary feeder, air lock, is the ash discharge device under the baghouse hopper. It consists of a rotor with blades, housing, reducer, and motor. The 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 an air lock, preventing gas from communicating between the inside of the dust collector and the outside.

• Air lock function prevents air leakage and maintains internal pressure of the dust collector. For negative pressure systems, prevents external air from entering through the discharge port; for 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.
• Planetary rotation principle, input and output shafts coaxial, direct connection with motor, compact structure and light weight. Bearings and gearbox are away from the valve body, avoiding high-temperature dust influence. Front and rear end covers have good sealing, preventing dust leakage.
• Housing material: cast iron, carbon steel, stainless steel (304/316). Drive mode: direct-coupled or chain drive. Motor: standard, explosion-proof, speed-regulating, or variable frequency.
• Discharge capacity expressed in "L/r", common specifications from 2 L/r to 14 L/r. By adjusting motor speed or selecting a frequency converter, discharge speed can be adjusted to match different ash discharge volumes.
• Standard speed 24 r/min; working temperature ≤280°C.

• 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
• Frequency converter for stepless speed regulation
• 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.