The ZWL passes big solids and long fibre where ordinary pumps choke. Here’s what “non-clog” really means — with the numbers that matter.
| Flow Rate | 8–800m³/h |
|---|---|
| Head | 10–80m |
| Power | 1.5–75kW |
| Inlet / Outlet Diameter | DN25–DN300 |
| Material | Cast Iron,SS304，SS316L |
“Non-clog” gets stamped on a lot of pumps, but it’s worth knowing what it actually means on the ZWL direct-coupled self-priming sewage pump — because the numbers are specific, and they’re what decide whether your pump keeps running or chokes.
The ZWL is rated to pass:
Those come straight from the pump’s design limits, and they’re why it copes with media that would jam an ordinary pump.
Two things make it work. First, the flow passage is wide and open — no tight gaps for solids to wedge into. Second, the impeller and volute are shaped to let stringy material sweep through rather than wind up on a vane. Combined with the axial-reflux self-priming action, you get a pump that both primes itself and swallows the junk.
Non-clog isn’t unlimited. Keep total suspended solids under about 15% of the medium’s weight, and don’t exceed the passable solid and fibre sizes above. Push past those and any pump will struggle. Tell us what’s in your liquid and we’ll confirm the ZWL size that passes it comfortably.
ZWL Direct-Coupled Self-Priming Sewage PumpThe “L” in ZWL means direct-coupled — impeller on the motor shaft, no coupling. Here’s what that compact design saves you in space, install time and upkeep.
ZWL Direct-Coupled Self-Priming Sewage PumpA clear, plain explanation of how the ZWL axial-reflux self-priming sewage pump primes itself and moves solids — no jargon, just the mechanism.
ZWL Direct-Coupled Self-Priming Sewage PumpA foot valve is the part that fails most on ordinary pumps. Here’s how the ZWL self-priming pump does away with it — and why that matters day to day.
