Submersible Centrifugal Aerator

The QXB Submersible Centrifugal Aerator is a high-efficiency, robust, and versatile aeration solution designed for wastewater treatment and aquaculture. Integrating a submersible motor directly with a centrifugal impeller, it delivers superior oxygen transfer and mixing with low noise and simplified installation, eliminating the need for separate blowers and complex air supply systems.

Submersible Centrifugal Aerator

The Submersible Centrifugal Aerator operates on a direct-connected, centrifugal principle. Its rotating impeller creates a negative pressure zone, drawing air through the intake pipe. This air is intimately mixed with water in the mixing chamber, producing a fine-bubble, gas-liquid mixture that is discharged radially. This process ensures high oxygen absorption efficiency, creates vigorous horizontal water flow to eliminate dead zones, and provides thorough mixing. Engineered for durability, its oil bath shaft seals and protective air cavity allow for continuous 24/7 operation with minimal maintenance.

Specifications & Parameters

Model	Power (kW)	Speed (r/min)	Max. Diving Depth (m)	Air Intake (m³/h)	Oxygenation Capacity (kgO₂/h)	Impeller Dia. (m)	Dimensions H (mm)	Dimensions L (mm)	Air Inlet (mm)	Mixing Plate (mm)
QXB0.75	0.75	2900	2.5	10	0.37 - 2.5	0.28	600	2500	Ø60	600x600
QXB1.5	1.5	2900	2.5	22	0.75 - 5.0	0.42	600	2500	Ø60	600x600
QXB2.2	2.2	1470	3	35	1.1 - 7.5	0.5	650	3000	Ø60	600x600
QXB3	3	1470	3.5	50	1.5 - 10	0.58	650	3500	Ø60	600x600
QXB4	4	1470	4	75	2.0 - 14	0.66	750	4000	Ø76	700x700
QXB5.5	5.5	1470	5	85	2.8 - 19	0.78	850	5000	Ø76	850x850
QXB7.5	7.5	1470	6	100	3.7 - 24	0.9	850	6000	Ø89	850x850
QXB11	11	1470	6	160	5.5 - 30	1	1500	6000	Ø89	1000x1000
QXB15	15	1470	6	200	7.5 - 40	1.1	1500	6000	Ø89	1000x1000
QXB18.5	18.5	1470	6	260	9.2 - 50	1.2	1500	6000	Ø89	1000x1000
QXB22	22	1470	6	320	11 - 60	1.3	1500	6000	Ø89	1000x1000

Note: Oxygenation capacity varies with diving depth (1-6m). Voltage: 380V, 50Hz, Insulation Class F.

Advantages

High Efficiency Aeration: Generates a highly oxidized dissolved liquid with a large proportion of micro-bubbles, ensuring high oxygen transfer efficiency (OTE) over a wide area.

Complete Mixing & No Dead Zones: Creates powerful horizontal aeration flow that circulates and scours every corner of the tank bottom, preventing sludge settlement.

Robust & Reliable Design: Features a simple, compact direct-drive structure, heavy-duty bearings, and oil bath shaft seals. An air cavity in the impeller housing protects seals from water, enabling trouble-free 24/7 continuous operation and a long service life.

Cost-Effective Installation & Operation: Saves significant engineering investment by eliminating the need for separate blowers, air supply piping, and dedicated blower rooms. Installation is simple, flexible, and operation is notably quiet.

Application Scenarios

The Submersible Centrifugal Aerator is ideal for a wide range of oxygenating and mixing applications.

Wastewater Treatment Aeration

Aquaculture Pond Oxygenation

Industrial Effluent Treatment

River & Lake Restoration

Installation Method

Installation is straightforward. The aerator is suspended from a supporting structure (e.g., a bridge, platform, or floating pontoon) and submerged to the recommended depth (see specs). The minimal submerging depth is critical for proper operation and preventing vortex air draw. Electrical power is connected to the waterproof cable. The Recommended Selection guide from our catalog provides optimal layout patterns for different tank geometries:

Circular Tanks: Single unit installed at the center.

Square Tanks: One unit per tank, positioned centrally.

Rectangular Tanks (L:W ≤ 1.5:1): Units installed along the long sides.

Rectangular Tanks (L:W ≤ 2:1): Units installed in corners to create a rotational flow.
Proper positioning ensures uniform oxygenation and mixing without short-circuiting.