ZW Self priming sewage pump

Compact horizontal self-priming centrifugal sewage pump engineered for continuous handling of wastewater, slurry and liquids containing large solids and long fibers. The pump uses an axial backflow outward-mixing design to achieve reliable self-priming without a foot valve or initial priming water. A wide-flow impeller and generous volute allow passage of large particles and fibrous material while minimising clogging and maintenance downtime.

Key features

• Self-priming design: starts without external priming water or a bottom/foot valve; reliable suction performance for routine sewage handling.
• Robust solids and fiber handling: wide-flow impeller and volute passage sized for heavy-duty sewage, sludge, ore waste and fibrous material.
• Simple, maintainable construction: straightforward layout for quick inspection, servicing and parts replacement.
• Energy conscious: designed for efficient hydraulic performance and reduced operating cost in continuous duty.
• Horizontal configuration: compact footprint for easy installation in pumping stations and process areas.

Materials

• Pump wet parts available in cast iron or stainless steel to suit corrosive or hygienic applications.

Performance and handling limits (typical)

• Suction lift: approx. 4.5–5.0 m (self-priming capability).
• Solids handling: suspended particle diameter up to ~60% of the pump inlet diameter.
• Fiber tolerance: can pass fibers with lengths up to approximately 5× the pump diameter.

Typical applications

• Municipal and industrial sewage collection and transfer
• Wastewater with suspended solids from mining, pulp & paper, textile and food processing
• Process slurries, ore waste and impurity-laden liquids
• Power plant effluent, public facility sewage treatment and aquaculture pond transfer

Ordering information & compatibility

• Horizontal ZW-series self-priming sewage pumps are offered in multiple sizes and configurations. Example part references from this range include MPN: ZW65-30-18 and Model: ZW50-15-30.
• Specify required flow, total head, liquid temperature, solids size and material preference (cast iron or stainless steel) when requesting a quote or sizing assistance.

Notes for buyers

• Confirm inlet diameter and solids/fiber characteristics against the pump’s solids-handling limits before specifying for heavy-fiber or large-grit duty.
• Provide duty point (flow and head) and installation suction conditions to ensure correct model selection and reliable self-priming performance.