Model: WQ/QW
300mm WQ submersible sewage pumps, 480-1100m³/h across eight variants, GAK-300 coupling, for large municipal and metropolitan sump stations.
| Flow Rate | 480-1100m³/h |
|---|---|
| Head | 10-25m |
| Power | 45-110kW |
| Inlet / Outlet Diameter | DN300 |
| Material | Cast Iron,SS304，SS316L |
Eight variants spanning roughly 480-1100 m³/h and 45-110 kW. Motor speed is where this size gets interesting: seven of the eight run at 1450 rpm (standard 4-pole), but the 800 m³/h at 12m/45kW variant runs at 980 rpm (6-pole) instead. That’s not an inconsistency. At low head, a slower-turning, larger-diameter impeller reaches the same flow with less mechanical stress and less noise than spinning a smaller impeller faster would. That matters when two 45kW options are sitting side by side on a spec sheet and one has a visibly larger casing than the other.
| Model | Flow (m³/h) | Head (m) | Power (kW) | Speed (rpm) | Efficiency | Footprint L×W×H (mm) |
| WQ300-1100-10 | 1100 | 10 | 55 | 1450 | 73% | custom, quote on request |
| WQ300-800-12 | 800 | 12 | 45 | 980 | 74% | 470×1305×1845 |
| WQ300-480-15 | 480 | 15 | 45 | 1450 | 66% | 470×1305×1845 |
| WQ300-800-15 | 800 | 15 | 55 | 1450 | 73% | 470×1305×2060 |
| WQ300-600-20 | 600 | 20 | 55 | 1450 | 73% | 470×1305×2060 |
| WQ300-800-20 | 800 | 20 | 75 | 1450 | 75% | 470×1305×2120 |
| WQ300-950-20 | 950 | 20 | 90 | 1450 | 76% | 470×1305×2120 |
| WQ300-1000-25 | 1000 | 25 | 110 | 1450 | 76% | 500×1350×2220 |
Efficiency climbs fairly steadily from 66% at the low end to 76% at the top, which is normal for this frame: the 480 m³/h variant runs well under what the casing is really sized for, so it lands as the least efficient point in the table rather than a defect. The footprint figures (overall length × width × height including motor) are what a civil team needs for base clearance and lifting headroom, separate from guide-rail length, which follows pit depth rather than pump size. If more than one unit shares a pit, get a hydraulic simulation done before pouring concrete, not after; vortex interference between giant-flow units is a documented problem, not a theoretical one. And regardless of variant: never lift by the power cable.
Submersible Sewage Pumps250mm WQ submersible sewage pumps, all rated 600m³/h across five head/power combinations, for large municipal and industrial sump stations.
Submersible Sewage Pumps200mm WQ/QW submersible sewage pumps, 250-400m³/h across nine variants, GAK-200 coupling, for municipal and industrial-park lift stations.
Submersible Sewage Pumps150mm WQ/QW submersible sewage pumps, 145-180m³/h, GAK-150 coupling. Municipal-grade lift stations, plus a heavy fibrous-waste grinder version.
