Large ZWL Self-Priming Pumps: DN125–DN300 Range

When a job needs serious volume — a municipal main station, a large treatment inlet, big flood drainage — you move into the large end of the ZWL direct-coupled self-priming sewage pump range. These DN125 to DN300 units shift a lot of dirty water and pass big solids to match.

The models in this class

Big ports, big flows, on 15–75 kW motors:

• 125ZWL120-20 — 120 m³/h at 20 m (DN125)
• 150ZWL200-15 — 200 m³/h at 15 m (DN150)
• 200ZWL280-14 / 300-18 / 300-22 / 280-28 — 280–300 m³/h, 14–28 m (DN200)
• 250ZWL400-20 — 400 m³/h at 20 m (DN250)
• 300ZWL600-10 / 800-14 / 800-20 — 600–800 m³/h, 10–20 m (DN300)

The top of the range, the 300ZWL800-20, moves 800 m³/h. And because passable solids scale with port size, a DN300 clears solids around 180 mm and fibre up to about 1500 mm — real, large debris.

Where they fit

These large ZWL pumps handle municipal main pumping stations, treatment-plant inlets, large flood and storm drainage, big industrial effluent and mine/site dewatering at volume. They keep the self-priming, non-clog design of the whole family — no foot valve, dry-mounted, primes itself — just scaled up. Cast iron for general sewage; stainless steel for corrosive high-volume streams.

Large ZWL range (DN125–DN300)

• Flow rate: 120–800 m³/h
• Head: 10–28 m
• Motor power: 15–75 kW
• Passable solids: up to ~180 mm (DN300)
• Material: cast iron or stainless steel