
ZW65-25-30 Self-Priming Pump for Aquaculture and Pond Water
ZW65-25-30: 25 m³/h at 30 m, 5.5 kW, DN65. Using a ZW pump for fish ponds and aquaculture wastewater.

Model: ZW65-30-18
ZW65-30-18: 30 m³/h at 18 m on a 4 kW, 1450 r/min motor, DN65 flanges. What the lower speed means in daily use.
| Flow Rate | 30m³/h |
|---|---|
| Head | 18m |
| Power | 4kW |
| Inlet / Outlet Diameter | 65 / 65mm |
| Material | Cast iron (standard); stainless steel on request |
Not sure this pump fits your duty? Try the pump selector
ZW65-30-18 is the first ZW model that runs at 1450 r/min instead of 2900. It delivers 30 m³/h at 18 m on 4 kW, through DN65 suction and discharge.
A four-pole motor turns at half the speed of a two-pole one. For a given duty, the impeller is larger and moves more slowly. With gritty or fibrous wastewater that usually means slower wear of the impeller and seal, and a quieter pump. The trade-off is a heavier unit: this one weighs 200 kg.
Its twin is ZW80-40-16, on the same 1040 mm base and the same 4 kW motor, with a DN80 inlet and 40 m³/h at 16 m.
| Item | ZW65-30-18 |
|---|---|
| Flow | 30 m³/h |
| Head | 18 m |
| Motor power | 4 kW |
| Speed | 1450 r/min |
| Efficiency | 45 % |
| NPSHr | 2.5 m |
| Self-priming height | 5.5 m |
| Self-priming time | 3 min per 5 m |
| Suction / discharge | DN65 / DN65 |
| Weight | 200 kg |
The pump, coupling and motor are mounted on a common base. L is the overall length; L1 to L4 are base lengths; a and f locate the outlet; B1 and B2 are the base widths; H is the shaft centre height; h1 and h2 are the heights of the suction and discharge flanges; h3 is the base thickness.
| L | L1 | L2 | L3 | L4 | a | f | B1 | B2 | H | h1 | h2 | h3 | Base bolts | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ZW65-30-18 | 1040 | 760 | 135 | 500 | 340 | 350 | 650 | 380 | 450 | 265 | 485 | 760 | 25 | 4ר18 |
| Flange | DN | Outer dia. D | Bolt circle | Raised face | Thickness b | Face height f | Bolts n×d |
|---|---|---|---|---|---|---|---|
| Suction | 65 | 160 | 130 | 110 | 14 | 2 | 4ר14 |
| Discharge | 65 | 160 | 130 | 110 | 14 | 2 | 4ר14 |

ZW65-25-30: 25 m³/h at 30 m, 5.5 kW, DN65. Using a ZW pump for fish ponds and aquaculture wastewater.

ZW50-20-35 lifts 20 m³/h to 35 m on 5.5 kW. Footprint and base bolt details for planning the foundation.

ZW50-15-30: 15 m³/h at 30 m, 3 kW. The model used as the catalogue example; how to order it in stainless or with an Ex motor.