Submersible Low-Speed Flow Propeller – QJB & QJBA Series

Short Description:

The QJB/QJBA Submersible Low-Speed Flow Propeller is a highly efficient mixing and flow-generation device widely used in wastewater treatment applications. It is specially designed for oxidation ditches, biological tanks, and flow control zones, and can also be applied in landscape water circulation and anti-freezing in rivers.

Equipped with a submersible motor, high-efficiency reducer, and uniquely shaped impellers, this series creates a large-volume, low-velocity flow field, ensuring uniform mixing and effective circulation throughout the treatment basin.

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Product Detail

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Key Features

✅Low Power Consumption: Motor power ranges from 1.5 to 7.5 kW, ensuring energy savings without compromising performance.
✅Large-Diameter Impellers: Propeller diameters between 1000 mm and 2500 mm, generating wide-area flow.
✅Low Rotational Speed: Operating at 36–135 RPM to reduce shear forces and support biological treatment.
✅Banana-Type or Broad-Blade Impellers:
- ✔ QJB Series: Traditional banana-type impellers with excellent self-cleaning capabilities.
  ✔ QJBA Series: Upgraded broad-blade impellers with 30% higher thrust and 33% increased surface area, ensuring improved mixing with the same power input.
✅High-Strength Materials: Impellers made of polyurethane or reinforced fiberglass (FRP) – lightweight, corrosion-resistant, and durable.
✅Stable Operation: Enhanced reducer and flange-mounted impeller system offer more reliable alignment and longer service life.
✅Dual Function: Capable of both pushing flow and mixing, adaptable to different tank geometries.

Application Areas

1. Municipal and Industrial Wastewater Treatment Plants
2. Oxidation Ditches
3. Anoxic or Anaerobic Zones
4. River and Canal Flow Maintenance
5. Landscape Water Systems
6. Anti-Freeze Circulation in Open Water

Technical Specifications

Model	Motor power (kw)	Rated current (A)	RPM (r/min)	Propeller Diameter (mm)	Thrust (N)	Weight (kg)
QJB1.5/4-1100/2-85/P	1.5	4	85	1100	1780	170
QJB3/4-1100/2-135/P	3	6.8	135	1100	2410	170
QJB1.5/4-1400/2-36/P	1.5	4	36	1400	696	180
QJB2.2/4-1400/2-42/P	2.2	4.9	42	1400	854	180
QJB2.2/4-1600/2-36/P	2.2	4.9	36	1600	1058	190
QJB3/4-1600/2-52/P	3	6.8	52	1600	1386	190
QJB1.5/4-1800/2-42/P	1.5	4	42	1800	1480	198
QJB3/4-1800/2-52/P	3	6.8	52	1800	1946	198
QJB4/4-1800/2-63/P	4	9	63	1800	2200	198
QJB2.2/4-2000/2-36/P	2.2	4.9	36	2000	1459	200
QJB4/4-2000/2-52/P	4	9	52	2000	1960	200
QJB4/4-2000/2-52/P	4	9	52	2200	1986	220
QJB5/4-2200/2-63/P	5	11	63	2200	2590	220
QJB3/4-2500/2-36/P	3	6.8	36	2500	2380	215
QJB4/4-2500/2-42/P	4	9	42	2500	2850	250
QJB5/4-2500/2-52/P	5	11	52	2500	3090	250
QJB7.4/4-2500/2-63/P	7.5	15	63	2500	4275	280