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2026
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Common Series of Wastewater Pumps and Their Core Features
Sewage pumps are centrifugal pumps specifically designed for conveying wastewater, sewage, sludge, and other media containing solid particles, fibers, and suspended solids.
Sewage pumps are centrifugal pumps specifically designed for conveying wastewater, sewage, sludge, and other media containing solid particles, fibers, and suspended solids. Featuring clog-resistant and wear-resistant characteristics, they are widely used in municipal, industrial, and construction sectors. Below are common sewage pump series and their core features:
I. Classification by Installation Method
Submersible Sewage Pumps (QW/WQ Series)
Core Structure: Integrated pump body and motor design allows fully submerged operation without requiring a separate pump house. Impellers feature large-channel, dual-flow, or cutting designs capable of handling solid particles or long fibers with diameters ranging from 20 to 100 mm.
Performance Parameters: Flow rate range 5–4000 m³/h, head 3–120 m, power 0.75–315 kW, medium temperature ≤60°C.
Applications:
Lifting sewage in municipal treatment plants; draining basement sump pits in residential complexes;
Wastewater discharge in industrial workshops (textile dyeing, papermaking, food processing);
Excavation dewatering at construction sites; mine tunnel drainage.
Advantages: Easy installation, low noise, odor containment, built-in overload protection.
Horizontal Sewage Pump (GW Series)
Core Structure: Horizontal installation, separate pump body and motor, open or semi-open impeller with spacious flow channels for superior clog resistance.
Performance Parameters: Flow rate 10~2000m³/h, head 5~80m, suitable for pumping sewage with high solid content.
Applications:
Circulation and sludge return in industrial wastewater treatment plants;
Manure transport in livestock farms, bloodwater discharge in slaughterhouses;
Applications requiring ground-level installation and easy maintenance access.
Advantages: Easy maintenance; can be equipped with self-priming devices to achieve self-priming functionality without requiring pump priming.
Vertical Sewage Pump (LW Series)
Core Structure: Vertical pipeline installation, can be directly connected in series within sewage pipelines, occupies minimal floor space, features an anti-entanglement impeller design.
Performance Parameters: Flow rate 5~1000m³/h, head 4~60m, medium temperature ≤80℃.
Applications:
Sewage lifting in high-rise building basements; central air conditioning condensate drainage;
Online wastewater conveyance in factory production lines; wastewater treatment equipment integration.
Advantages: Compact structure, minimal installation space, stable operation, and automatic control capability.
II. Special Function Sewage Pump Series
Cutting-Type Sewage Pump
Core Feature: Equipped with rotating cutting blades at the inlet to shred and discharge debris such as cloth strips, plastic bags, and fibers, completely eliminating clogging issues.
Applications: Septic tank drainage, kitchen waste water discharge, domestic garbage leachate conveyance.
Corrosion-Resistant Sewage Pumps
Core Features: Pump body constructed from stainless steel (304/316) or fluoroplastic materials, with corrosion-resistant rubber seals. Suitable for transporting acidic or alkaline wastewater.
Applications: Acidic/alkaline wastewater in chemical plants, electroplating effluent, corrosive liquid discharge in pharmaceutical factories.
Self-Priming Sewage Pump (ZXW Series)
Core Features: Built-in self-priming chamber eliminates pre-filling requirements. Achieves 3–5m self-priming height, ideal for applications where suction lines cannot be fully filled with liquid.
Applications: Bilge drainage in vessels, transport of oily wastewater in oilfields, long-distance sewage lifting.
III. Key Selection Considerations
Select impeller type based on solid content and particle size:
- Large particles: Choose wide-channel impellers.
- High fiber content: Opt for cutting impellers.
Select pump type based on installation conditions:
- Submersible installation: Choose submersible models.
- Surface installation: Select horizontal models.
- Pipeline series connection: Use vertical models.
When handling corrosive media, ensure pump bodies and seals are made of stainless steel or fluoroplastic materials.
Common Series of Wastewater Pumps and Their Core Features
Sewage pumps are centrifugal pumps specifically designed for conveying wastewater, sewage, sludge, and other media containing solid particles, fibers, and suspended solids.
What are the common faults of multistage centrifugal pumps?
Multi-stage centrifugal pumps have a more complex structure than single-stage centrifugal pumps. Failures often center on axial force imbalance, inter-stage leakage, and abnormal hydraulic performance.
The application scenarios for single-stage centrifugal pumps and multistage centrifugal pumps are primarily determined by head requirements and flow characteristics.
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