QJB-W Series Sludge Return Pump
The QJB-W Series Sludge Return Pump is engineered for low-head, high-flow applications with advanced anti-tangle auto-coupling technology, specifically designed for WWTP denitrification and mixed liquor recirculation processes.
Product Overview
Developed from proven submersible mixer technology, this pump is explicitly designed for mixed liquor recirculation and denitrification processes in secondary wastewater treatment plants. Equipped with a 3-blade swept-back impeller, the pump offers excellent anti-tangle and self-cleaning performance while ensuring continuous and safe operation.
Technical Specifications
| Feature |
Specifications (Metric / US Customary) |
| Motor Power |
1.5 kW - 18.5 kW |
| Impeller Diameter |
400 mm / 615 mm (15.7" / 24.2") |
| Discharge Size (DN) |
400 mm / 600 mm (15.7" / 23.6") |
| Max Immersion Depth |
10 m (32.8 ft) |
| Max Medium Temperature |
40℃ (104°F) |
| Allowable pH Range |
6.0 - 9.0 |
| Motor Protection |
IP68 Enclosure / Class F Insulation |
| Bearing Lifespan |
> 100,000 Hours (Premium Imported) |
Key Applications
- WWTP Mixed Liquor Recirculation: Specifically designed for mixed liquor recirculation and denitrification in secondary WWTPs, providing reliable high-flow transport for biological processes
- Versatile High-Flow Pumping: Highly applicable for surface drainage, irrigation, and any wastewater or sludge pumping loops requiring low head and high flow conditions
Safety & Protection Features
Featuring IP68 protection class, Class F insulation, and built-in leak and overload alarms, the pump ensures continuous and safe operation at submersion depths up to 10 meters (32.8 ft).
Frequently Asked Questions
What is the expected lifespan of the bearings and seals?
The pump utilizes premium imported bearings with a design lifespan exceeding 100,000 hours. For sealing, it uses O-rings for static sealing and robust mechanical seals to isolate the oil chamber from the fluid, ensuring a continuous operation lifespan of 10,000+ hours.
Is the pump easy to install and maintain for operators?
Yes, it is highly user-friendly. It features an Auto-Coupling installation system that allows for tool-free lifting and maintenance. Mounting is also incredibly easy; only the wall tube needs to be embedded, while the rest of the mounting brackets are secured using standard expansion bolts.
