The QJB Series Submersible Mixers are available in two main categories: Mixing & Agitating and Low-Speed Flow Booster.

The Mixing Series is a key component in wastewater treatment for liquids containing suspended solids. It ensures the homogenization of solid-liquid or solid-liquid-gas mixtures during biochemical processes. Each unit integrates a submersible motor, gearbox, impeller, and installation system.

• Medium temperature: Max. 40 °C
• pH range: 5–9
• Max. liquid density: 1150 kg/m³
• Max. immersion depth: 20 m

• Compact & Durable: Compact design with easy installation and maintenance, ensuring a long service life.
• High Efficiency & Self-Cleaning: Optimized hydraulic design for superior efficiency. Swept-back blades provide a self-cleaning function that prevents wrapping and clogging.
• Energy Saving: Synergizes with aeration systems to significantly reduce energy consumption, boost oxygen transfer rate, and prevent sludge sedimentation.
• Reliable Motor: IP68 protection, Class F insulation, and premium NSK/SKF bearings. Built-in thermal protection (anti-condensation heater optional) guarantees reliable operation.
• Premium Sealing: Double mechanical seals (Tungsten Carbide) combined with FKM (Fluororubber) materials.

The motor drives the impeller to create a swirling jet (for shear mixing) and an axial flow (for propulsion). This combination generates a massive volumetric flow, effectively maintaining the required fluid velocity and process flow field.

Mixing Series: Features a direct-drive, multi-pole motor. It is compact, highly efficient, energy-saving, and easy to maintain. Precision-crafted impellers deliver powerful thrust, making it ideal for solid-liquid mixing and blending.

Proper selection is crucial for optimal performance and is primarily determined by the flow velocity within the tank. The required velocity is generally 0.15–0.3 m/s: below 0.15 m/s fails to create effective bulk flow, while above 0.3 m/s disrupts biological processes and wastes energy.

Selection requires confirming:

• Application: sewage, sludge, or biological tanks
• Media parameters: suspended solids (SS), viscosity, temperature, and pH
• Tank geometry: shape and depth

Motor power is determined by tank volume, liquid density, and water depth. Single or multiple mixers can be deployed as required.

Unlike traditional shaft mixers, QJB mixers offer flexible positioning. Adjusting the location creates varied flow patterns to completely eliminate dead zones. Power is sized based on tank volume, media density, and depth (single or multiple units).

See typical efficient layouts below.