Cast Iron Submersible Mixer with Dual Mechanical Seal and 1.5-22 kW Power Range for Wastewater Tanks

The Submersible Mixer is a rugged, guide-rail-mounted agitator engineered to keep solids in suspension and create the gentle, uniform flow required in anoxic and anaerobic zones of biological wastewater treatment plants. Powered by a heavy-duty motor with a hardened propeller, the mixer generates a high-thrust jet that eliminates dead zones, prevents sludge deposition, and improves contact between biomass and substrate. Its compact, submersible design requires no above-water structure, and the dual mechanical seal with oil chamber and moisture sensor protects the motor even under continuous 24/7 immersion, making it a dependable workhorse for municipal and industrial plants alike.

• High-Thrust Propeller: A precision-cast, three-blade propeller delivers thrust from 500 N to 6,000 N, ensuring complete mixing and solids suspension in large tanks.
• IP68 Dual-Seal Motor: Two independent mechanical seals plus an oil chamber and moisture-detection probe safeguard the motor against water ingress, even during peak load.
• Robust Cast Iron Housing: The motor housing is cast iron with a stainless steel shaft, providing the mechanical strength and corrosion resistance demanded by harsh wastewater.
• Versatile Guide-Rail Mounting: A standard guide-rail and lifting system allows the mixer to be raised for service without draining the tank, minimising downtime.
• Energy-Efficient Impeller: Optimised hydraulic design delivers high mixing efficiency at low specific power, reducing the plant's aeration and mixing energy bill.
• Wide Power Range: Available from 1.5 kW to 22 kW, and in 380V/50Hz or custom voltages, to match virtually any tank geometry and volume.

• Anoxic and anaerobic zones of biological nutrient removal plants
• Municipal and industrial wastewater equalisation tanks
• Sludge holding and storage tanks
• Storm water and emergency retention basins
• Industrial process and mixing tanks

Every mixer is assembled with a factory-set seal and insulation test, then packed in an export wooden case with anti-rust protection. The delivery includes the mixer, guide rail, lifting chain, and mounting bracket as required, together with a detailed manual. We support installation and provide a full spare-parts service covering seals, propellers, and cables to maximise service life.