HSRBA Rotor Brush Aerator
    • HSRBA Rotor Brush Aerator
    • HSRBA Rotor Brush Aerator
Detailed Product Description

The HSRBA Rotor brush aerator is a horizontal shaft surface aerator.  It is widely used with the oxidation ditch process in the treatment of city sewage and industrial wastewater and has achieved good results.

Operating Principle

A vertical motor drives the spiral cone-column bevel gear reducer. The brushes impact the water surface as they rotate and create a horizontal laminar flow, oxidation is achieved at the same time.  Sufficient flow velocity prevents active sludge from sedimentation and mixes the water with the sludge, which facilitates the growth of microorganisms. Thus the rotor brush aerator can satisfy the mixing, oxidation and flow requirements of the oxidation ditch process.

Rotor Brush Aerator Structure and Characteristics

Main components of the aerator include: electric motor, axial installation gearbox, main axle, brush plates, driving end and terminating end bearing support lubrication system and control cabinet, etc.  Its main characteristics are:

1. The vertical, outdoor type electric motor is located nearly 1m above the water surface; therefore the possibility of damage caused by splashed water is greatly reduced and the whole setup has a small footprint.

2. The gearbox uses cone - column gears. All gears have hard surfaces with gear precision Grade 6. The gearbox has the advantages of large bearing capacity, high torque transmission efficiency, small volume, light weight, steady run, low noise and power efficient.

3. Bearing support is equipped on the driving end of the main axle so a shaft coupling is not needed.  This way the main axle and brushes can remain in position when replacing worn parts of the gearbox. Installation of gearbox is therefore simple, with no need of calibration and the precision of the whole setup can be ensured.

4. Brush plates are made of high-quality 304 or 316stainless steel. Brushes are assembled into a folded hoop and arranged in a spiral form. Thus the brushes can enter the water evenly, and bear the load steadily. The brushes are convenient to assemble and disassemble.

5. Center-regulating bearing and floating bearing supports are used to align the center automatically and overcome installation errors.  They can also compensate for the axial extension caused by changes in temperature.

6. The load of the aerator and the oxygenation rate can be changed by adjusting the immersion depth of the Rotor brushes.  This can be done very easily.

Specifications and Technical Parameters

 Rotor Brush Aerator Performance Graphs

Rotor Brush Aerator Installation Guide


 1. Based on customer requirement, main axle length, number of brushes and motor power can all be changed accordingly.

2. The electric motor can be dual speed or variable speed in order to meet the oxygenation rate requirement.

3. The model shown is our standard design, if changes to the drive unit are required, the machine profile and foundation requirement may also change accordingly.

4. The drive unit can rotate clockwise or counterclockwise and the main axle can be installed on the left or the right side of the drive unit all depending on the direction of water flow and the location of the drive unit.  The drawings provided are for clockwise rotation with the main axle on the left side.  Please specify all requirements when placing the order.

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