Duwan Environmental Equipment (Jiangsu) Co., Ltd

Manufacturer of settling pond reaction mixers

QJB5/12-620/3-480S Submersible Mixing Pump

Duwan Environmental Submersible Mixers Technical Specification

Product Range

Duwan Environmental ProtectionThe mixer provided should beFinished ProductEquipment, including guide rods, lifting devices, underwater cables, fixing bolts, fasteners, and all necessary accessories for installation and safe operation.

2. Technical Specifications

Submersible mixers should be capable of continuous and intermittent operation under full immersion conditions. Throughout the operation process, the submersible mixers must maintain vibration-free and smooth running. Design lifespan of the product15 years, first-time故障-free operation of 8,000 hours.

Each submersible mixer must be capable of operating in wastewater and must propel the flow of the wastewater.

The submersible agitator rotates smoothly without any jamming, stalling, or vibration.

Submersible mixers should undergo a sealed air pressure test, with the test pressure being3 kg/cm², no leakage observed for 5 minutes.

Each submersible mixer should be equipped with a stainless steel rod and stainless steel wire rope for free vertical and directional movement.

1) Wiring Room

The protection grade of the motor wiring room isIP68, must be completely sealed from any surrounding liquids.

2) Cooling

The motor's cooling is achieved through thermal conduction from the stator to the housing.

3) Axial Seal

Utilizes an independent high-quality sealing system to ensure that in the event of lower seal failure, the liquid entering the stator chamber will not come into contact with the bearings and stator. The mechanical seal is made of corrosion-resistant silicon carbide./Silicon carbide, with a medium pH range of 6-9. The mechanical seal should be maintenance-free, capable of withstanding thermal shock, and feature excellent emergency operation characteristics.

Duwan Environmental ensures the service life of mechanical seals is not less than25,000 hours.

4) Axle

The motor shaft transmission is a single shaft, which is reliably sealed and does not come into contact with liquids.

5) Submersible mixer impeller

Utilizing an advanced push-type anti-warping curve design, the impeller features a stamping structure, offering a lightweight yet high-strength construction with excellent balance. The optimized impeller surface is equipped with self-cleaning capabilities, preventing blockages and slag formation.

Flow channeling hood included for streamline effect, enhancing axial flow and directional control, and increasing circulation flow.

6) Electric Motor

The motor should be a three-phase squirrel-cage motor.3-phase 380V, 50Hz, protection class IP68, insulation class F. The motor should bePlease provide the Chinese content to be translated.Under heavy mixing loads, there will be no overload. The motor starts not less than every hour.15 times, and the average temperature rise of the stator winding shall not exceed 80°C. The stator should be hot-pressed into the stator chamber without using bolts, pins, and other connecting devices that require drilling into the stator chamber.

7) Bearings

The impeller shaft is supported by a double-row angular contact ball bearing and a single-row deep groove ball bearing, selected to ensure long-term and reliable operation.NSK imported bearings, service life of not less than 100,000 hours.

8) Cables and Cable Seals

The motor should be equipped with control and power underwater cables, and a reliable seal should be applied. If the power cable is a multicore cable, each cable should be sealed individually. The cables should be inserted into the junction box and sealed with reusable rubber gaskets; the use of resins or other canned sealing materials is not permitted. Each cable should be fitted with a cable net or cable clip to hang the cable on hooks and bear its own weight.

9) Leak Sensor

Provide a sensor for detecting liquid leakage within a sealed cavity. All signals should be monitored separately and alarm signals should be issued individually before any severe damage occurs to the impeller or motor.

10) Thermal Protection

Each phase of the motor is protected by a normally closed temperature sensor. The three sensors should be connected in series, and all should be set to Celsius.Protected at 140°C and connected to the control cabinet, linked within the cabinet.

11) Installation Lift System

Duwan Environmental provides complete sets of installation and fastening materials for submersible mixers. The installation system should include guide rails, steel cables, and must have an arm-type lifting frame and a hand-cranked winch.

3. Main Materials

Motor Housing:                 Cast IronHT200

Propeller:                   Stainless Steel316L and above

Propeller shaft                 Stainless steel420

Mechanical Seals                  Corrosion-resistant silicon carbideSilicon Carbide

Steel wire rope                    Stainless Steel304 and above

Bolts, nuts, washers:          Stainless Steel304

Guides, brackets:                Stainless Steel304

Lifting Frame            Stainless Steel304

For use with 304 stainless steel field control cabinets, one-to-one configuration, equipped with PLC signal interface.

Duwan Environmental QJB Diving EquipmentAgitatorMachine

Technical Specifications:

Jiangsu Du'an Environmental Protection Stainless Steel Submersible AgitatorTypically, flow guide hoods are designed to enhance axial flow and reduce radial flow, minimizing impeller vibration and increasing operational stability. However, low-speed axial flow submersible mixers do not come with a flow guide hood.

Submersible mixer model rated power rated current impeller diameter impeller speed(r/min) Weight (kg)

(kw)(A)(mm)

Cast-molded mixerQJBO.85/8-260/3-740/C/S

QJB1.5/6-260/3-960/c/s

QJB2.2/8-320/3-740/c/s

QJB4/6-320/3-960/c/s

QJB5.5/4-670/3-295/c/s

QJB7.5/4-670/3-330/c/s

QJB11/4-790/3-303/c/s

QJB15/4-790/3-360/c/s

Press-blending mixerQJB1.5/8-400/3-740/s

QJB2.5/8-400/3-740/s

QJB3/8-400/3-740/s

QJB4/12-615/3-480/s

QJB5/12-615/3-480/s

QJB7.5/12-615/3-480/s

QJB10/12-615/3-480/s