QJB-W 2.5 kW Submersible Sludge Recirculation Pump with Auto-Coupling Guide Rail and Dual Mechanical Seals

• Model: QJB-W 2.5 Submersible Sludge Return Pump
• Power: 2.5 kW | Current: 6.8 A | 50 Hz, 3-Phase
• Impeller Diameter: 400 mm | DN: 400 mm
• Auto-Coupling Guide Rail Installation for Tool-Free Maintenance
• Premium SKF/NSK Bearings (≥100,000 h lifespan)
• Dual Mechanical Seals: Tungsten Carbide / Viton + O-Rings
• IP68 Protection | Class F Insulation | Max Depth 10 m
• Anti-Tangle 3-Blade Swept-Back Impeller Design
• Suitable for Sludge Return, Recirculation & Denitrification in Small-Medium WWTPs
• ISO9001 & CE Certified | Made in Nanjing, China

The Lanjiang QJB-W 2.5 is a versatile submersible sludge return pump designed for small-to-medium wastewater treatment plants that require a dependable balance of hydraulic performance and energy efficiency. Rated at 2.5 kW (6.8 A), this model provides approximately 67% more power than the 1.5 kW variant, giving operators extra headroom for slightly deeper basins, longer return lines, or higher mixed liquor suspended solids (MLSS) concentrations.

The auto-coupling guide rail system allows the pump to be raised and lowered without tank entry, vastly simplifying routine inspection and maintenance while ensuring reliable 24/7 operation.