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QJB7.5/12-615/3-480S Submersible Mixer 7.5 kW stirrer for sewage treatment

QJB7.5/12-615/3-480S Submersible Mixer 7.5 kW stirrer for sewage treatment

QJB7.5/12-615/3-480S Submersible Mixer 7.5 kW stirrer for sewage treatment

Product Details:

Place of Origin: China
Brand Name: BK
Certification: ISO9001/ISO14001
Model Number: QJB7.5/12-615/3-480S

Payment & Shipping Terms:

Minimum Order Quantity: 1 set
Price: Negotiation
Packaging Details: Export standard wooden case
Delivery Time: 5-20 working days, depends on order amount and specification
Payment Terms: L/C, T/T
Supply Ability: 200 SETS per month
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Detailed Product Description
Model: QJB7.5/12-615/3-480S Motor Power: 7.5KW
Main Materials: Stainless Steel Rotary Speed: 480rpm
Diameter Of Blade: 615mm Axial Thrust (N)): 2600
Application:: Water Treatment, Applied For Densification Process, Sludge Dewatering Process, Heat Transfer, And Cesspit Clean Standard Installation System Size: 4m, Stainless Steel
High Light:

water treatment mixers


wastewater mixers


QJB7.5/12-615/3-480S Submersible Mixer, 7.5 kW stirrer for sewage treatment



About QJB mixer


QJB Series Submersible sewage mixer/submerged mixer/sludge mixer adopts excellent hydraulic design, wider type spectrum and optimized structure. Pump casing is produced by special machine tool, which ensures concentricity among shaft bearing, shaft and pump case, and provides better reliability and maintainability. Apply to municipal water supply and drainage, water circulation of air conditioner, agricultural hydraulic engineering, such as irrigation, drain flooded fields ,industrial water supply system, firefighting system, water supply and drainage of heating system, transportation of clean water ect.



Working Conditions


The submersible mixer can be continuous operation in the conditions as below:

  • The maximum medium temperature be less than 40℃
  • Medium PH value be in 5~9
  • Medium density be less than 1150kg/m3
  • Continuous operation, the depth be less than 20m




Model No.


Model meaning:

QJB—submersible mixer

7.5—rated motor power of mixer

12—poles of motor

615—diameter of impeller

3—quantity of impeller

480—rated speed of mixer

S—stainless steel

Motor Power


380/400/415/440V, 3PHASES, 50/60HZ, 12 Poles

Rated Current


Main Materials

Stainless steel

Rotary speed


Diameter of Blade


Axial thrust


Installation system

Equipped according to tank depth

Including leader, leader base, lifting head, support frame, limit frame, etc.

N.W. of mixer without installing system


Flow rate field drawing QJB7.5/12-615/3-480S Submersible Mixer 7.5 kW stirrer for sewage treatment 0

*  stanard installation system is 4m,  can made to order to meet the demands of tank and water depth.




1. Two mechanical seals are equipped at the submersible motor, the materials of the seal is tungsten carbide. A special finger sleeve structure is adopted at the cable out-coming place for good sealing and anti-corrosion performance.

2.  The impeller is designed with a special anti-twisting curve in order to have it produce a powerful tangential water flow and avoid wrapping and blocking. A reasonable structure with nice appearance is  designed.

3.  QJB type low speed of thrusters motor winding for class F insulation, protection grade for IP68, choose a lubrication free maintenance, import bearings with oil leak detection room and motor winding overheating protection function, make the motor work more safety and reliable.

4.  QJB type low mechanical seal of the friction thrusters pay material for corrosion resistance of tungsten carbide, all fasteners for stainless steel material.

5.  QJB type low speed thrusters under specified conditions, first failure of average running time before not less than 10000 hours, the machine service life is not less than 15 years.



Working Principle


The propeller blade of a special structure starts slow moving driven by the under-water motor to produce a powerful water flow flowing in a lower tangential direction to make the liquid’s power increased and produce strong stirring to reduce the precipitation under the water, thus realizing liquid stirring and flowing.



Structure of Mixer


QJB7.5/12-615/3-480S Submersible Mixer 7.5 kW stirrer for sewage treatment 1


Installation diagram


QJB7.5/12-615/3-480S Submersible Mixer 7.5 kW stirrer for sewage treatment 2


Contact Details
B-Tohin Machine (Jiangsu) Co., Ltd.

Contact Person: Ms. Jane Zhou

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B-Tohin Machine (Jiangsu) Co., Ltd.
Yong'an Road, Industrial Park for Environmental Science & Technology, Yixing City, Jiasngsu Province 214205, China
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