Selection Guide Oct 20, 2026 2 min
60 Hz and Special Voltage Sewage Pumps: What Changes
Why a 50 Hz sewage pump should not run on 60 Hz, how frequency changes flow, head and power, and what to tell us when you need 440 V or 60 Hz.
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Newsroom
Sewage Pump News & Engineering Insights
Product launches, practical pump-selection guides and company updates from the Haquan engineering team.
Selection Guide
Selection Guide Oct 20, 2026 2 min
Cast Iron, 304 or 316L: Choosing a Sewage Pump Material
Cast iron, 304 or 316L stainless steel? How to choose a sewage pump material by liquid, chlorides and budget, with a real price comparison.
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Technical Guide Oct 20, 2026 2 min
Why a Self-Priming Pump Can’t Lift 8 m (and What to Use)
Atmospheric pressure limits how high any pump can pull water. Why self-priming sewage pumps stop at about 5 m of suction lift, and the alternatives.
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Case Studies Oct 15, 2026 2 min
Custom Single-Phase Sewage Pump for a Sewage Pit in Dubai
A customer in Dubai needed 90 m³/h from a single-phase 220 V pump with a 150 mm outlet. How we built the custom WQD90-7-3 and delivered it door to door.
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Selection Guide Sep 30, 2026 4 min
Choosing the Right Impeller for a Sewage Pump
Compare sewage pump impeller types and learn when to choose single-channel or double-channel designs, including materials, efficiency and solids handling.
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Technical Guide Sep 30, 2026 3 min
Why Double-Channel Impellers Are Common in Sewage Pumps
Discover why double-channel impellers are widely used in sewage pumps, with advantages in hydraulic balance, efficiency, stability and wastewater handling.
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