Zw Zwl Self Priming Non Clogging Horizontal Pump

Compact, heavy-duty self-priming centrifugal pump designed for reliable handling of sewage, slurries and liquids containing solids and long fibers. The pump combines an axial-reflux external-mix impeller and a specially profiled pump casing to deliver strong self-priming performance and non-clogging passage without the need for foot valves or complex priming systems.

Key features

• Self-priming, non-clogging centrifugal design suitable for liquids containing large solids and long-fiber impurities
• Axial-reflux external mixing impeller and optimized flow channels for efficient suction and smooth solids passage
• Two drivetrain arrangements: ZW (shaft-coupling type — suspended, split body with coupling-transmitted drive) and ZWL (closed-coupled/direct connection — pump and motor shafts coaxial for compact installation)
• Can operate as a general-purpose clean-water pump when required (no bottom valve or external priming required)
• Simple construction for easy inspection, maintenance and repair
• High efficiency and energy-saving operation in continuous-duty pumping of contaminated liquids

Typical applications

• Municipal sewage and drainage systems
• Industrial wastewater: pulp and paper, textile, food processing, chemical, power stations
• Aquaculture, pond and river water transfer
• Plants or processes that handle mixed suspensions, fiber-rich slurries or grit-laden effluents

Benefits for B2B users

• Reduces downtime and blockage-related maintenance compared with conventional pumps when handling solids and fibers
• Flexible installation options (shaft-coupled or close-coupled) to suit plant layout and serviceability needs
• Eliminates the need for some upstream priming hardware, simplifying piping and installation

Selection & maintenance notes

• Select the ZW shaft-coupled version for easier on-site serviceability and when coupling alignment/soft-start options are required
• Choose the ZWL close-coupled version for compact footprint and simpler mechanical arrangement
• Regular inspection of impeller clearances and suction piping is recommended for applications with high solids concentrations

Contact your procurement or engineering team with required duty point (flow, head), liquid characteristics (max particle size, solids concentration, fiber content) and motor requirements so the pump can be matched to your system.