SP (self-priming sewage)
Non-clogging self-priming sewage pump
- Flow 10–750 m³/h
- Head up to 38 m
- 0.75–90 kW
Self-priming sewage pump
ZW self-priming
Self-priming sewage pump, ZW(F) non-clogging self-priming sewage pump
ZW self-priming: self-priming sewage pump from the CNP range. 42 models, flow 5 to 300 m³/h, head up to 40 m, motors 0.75 to 30 kW. Typical duties: municipal sewage and sewage treatment (environmental protection), paper, textile and dyeing industry, river and pond farming; liquids with suspended particles and fibres. Open a model for its rated duty, dimensions and datasheet, or send us your duty and we will confirm the selection.
- External mixing structure combining self-priming and non-clogging in one design
- Unique pump body and impeller flow passage for strong sewage discharge
- Oil chamber behind the mechanical seal for reliable seal operation
- Cast iron pump (stainless flow parts on ZWF models)
CNP-S-000075- Flow
- 5–300 m³/h
- Head
- up to 40 m
- Power
- 0.75–30 kW
- Mains
- 50 Hz
- Models
- 42
- Liquid temp.
- Up to 40 °C (ambient also 40 °C or less)
Sizes
The 42 models of the ZW self-priming range grouped by type. Open the Models tab for every model with its performance data.
| Type | Flow range | Head | Power | Outlet | Models |
|---|---|---|---|---|---|
| ZW25 | 5–8 m³/h | 12–18 m | 0.75–1.5 kW | DN25 | 2 |
| ZW32 | 5–10 m³/h | 10–30 m | 0.75–3 kW | DN32 | 6 |
| ZW40 | 10–20 m³/h | 10–28 m | 1.1–3 kW | DN32 | 6 |
| ZW50 | 10–20 m³/h | 10–40 m | 1.1–5.5 kW | DN40 | 6 |
| ZW65 | 25–40 m³/h | 20–40 m | 4–7.5 kW | DN65 | 4 |
| ZW80 | 40–65 m³/h | 15–35 m | 4–15 kW | DN65 | 6 |
| ZW100 | 80–100 m³/h | 16–35 m | 7.5–18.5 kW | DN80 | 5 |
| ZW150 | 150–200 m³/h | 15–30 m | 11–30 kW | DN125, DN150 | 5 |
| ZW200 | 300 m³/h | 15–20 m | 22–30 kW | DN150 | 2 |
Models
Filter by duty point, mains frequency or size. Click a model for its performance curve and data.
| Model | Series | Flow m³/h | Head m | Power kW | rpm | Outlet | kg | |
|---|---|---|---|---|---|---|---|---|
| 25ZW(F)5-12 | ZW25 | 5 | 12 | 0.75 | 2900 | DN25 | 65 | Details |
| 25ZW(F)8-18 | ZW25 | 8 | 18 | 1.5 | 2900 | DN25 | 77 | Details |
| 32ZW(F)5-12 | ZW32 | 5 | 12 | 0.75 | 2900 | DN32 | 67 | Details |
| 32ZW(F)5-20 | ZW32 | 5 | 20 | 1.5 | 2900 | DN32 | 78 | Details |
| 32ZW(F)10-10 | ZW32 | 10 | 10 | 1.1 | 2900 | DN32 | 70 | Details |
| 32ZW(F)8-18 | ZW32 | 8 | 18 | 1.5 | 2900 | DN32 | 78 | Details |
| 32ZW(F)10-20 | ZW32 | 10 | 20 | 2.2 | 2900 | DN32 | 81 | Details |
| 32ZW(F)10-30 | ZW32 | 10 | 30 | 3 | 2900 | DN32 | 92 | Details |
| 40ZW(F)10-10 | ZW40 | 10 | 10 | 1.1 | 2900 | DN32 | 73 | Details |
| 40ZW(F)10-20 | ZW40 | 10 | 20 | 2.2 | 2900 | DN32 | 81 | Details |
| 40ZW(F)15-10 | ZW40 | 15 | 10 | 1.1 | 2900 | DN32 | 75 | Details |
| 40ZW(F)15-18 | ZW40 | 15 | 18 | 2.2 | 2900 | DN32 | 81 | Details |
| 40ZW(F)15-28 | ZW40 | 15 | 28 | 3 | 2900 | DN32 | 94 | Details |
| 40ZW(F)20-13 | ZW40 | 20 | 13 | 2.2 | 2900 | DN32 | 80 | Details |
| 50ZW(F)10-20 | ZW50 | 10 | 20 | 2.2 | 2900 | DN40 | 82 | Details |
| 50ZW(F)15-10 | ZW50 | 15 | 10 | 1.1 | 2900 | DN40 | 80 | Details |
| 50ZW(F)15-18 | ZW50 | 15 | 18 | 2.2 | 2900 | DN40 | 82 | Details |
| 50ZW(F)15-28 | ZW50 | 15 | 28 | 3 | 2900 | DN40 | 95 | Details |
| 50ZW(F)20-13 | ZW50 | 20 | 13 | 2.2 | 2900 | DN40 | 82 | Details |
| 50ZW(F)20-40 | ZW50 | 20 | 40 | 5.5 | 2900 | DN40 | 180 | Details |
| 65ZW(F)25-30 | ZW65 | 25 | 30 | 5.5 | 2900 | DN65 | 170 | Details |
| 65ZW(F)25-40 | ZW65 | 25 | 40 | 7.5 | 2900 | DN65 | 180 | Details |
| 65ZW(F)30-20 | ZW65 | 30 | 20 | 4 | 2900 | DN65 | 142 | Details |
| 65ZW(F)40-25 | ZW65 | 40 | 25 | 7.5 | 2900 | DN65 | 172 | Details |
| 80ZW(F)40-16 | ZW80 | 40 | 16 | 4 | 2900 | DN65 | 142 | Details |
| 80ZW(F)40-25 | ZW80 | 40 | 25 | 7.5 | 2900 | DN65 | 172 | Details |
| 80ZW(F)45-15 | ZW80 | 45 | 15 | 5.5 | 2900 | DN65 | 220 | Details |
| 80ZW(F)65-15 | ZW80 | 65 | 15 | 5.5 | 2900 | DN65 | 240 | Details |
| 80ZW(F)65-25 | ZW80 | 65 | 25 | 11 | 2900 | DN65 | 265 | Details |
| 80ZW65-35 | ZW80 | 65 | 35 | 15 | 2900 | DN65 | 350 | Details |
| 100ZW80-20 | ZW100 | 80 | 20 | 11 | 1480 | DN80 | 345 | Details |
| 100ZW100-16 | ZW100 | 100 | 16 | 7.5 | 1480 | DN80 | 325 | Details |
| 100ZW100-20 | ZW100 | 100 | 20 | 11 | 1480 | DN80 | 346 | Details |
| 100ZW100-30 | ZW100 | 100 | 30 | 15 | 1480 | DN80 | 370 | Details |
| 100ZW100-35 | ZW100 | 100 | 35 | 18.5 | 2900 | DN80 | 385 | Details |
| 150ZW150-15 | ZW150 | 150 | 15 | 11 | 1480 | DN125 | 380 | Details |
| 150ZW150-20 | ZW150 | 150 | 20 | 15 | 1480 | DN125 | 380 | Details |
| 150ZW200-15 | ZW150 | 200 | 15 | 15 | 1480 | DN150 | 465 | Details |
| 150ZW200-20 | ZW150 | 200 | 20 | 22 | 1480 | DN150 | 530 | Details |
| 150ZW200-30 | ZW150 | 200 | 30 | 30 | 1480 | DN150 | 680 | Details |
| 200ZW300-15 | ZW200 | 300 | 15 | 22 | 1480 | DN150 | 640 | Details |
| 200ZW300-20 | ZW200 | 300 | 20 | 30 | 1480 | DN150 | 660 | Details |
Performance range
Every model of the ZW self-priming range on one chart: each dot is the rated duty point of one model. Click a line or dot to open that model with its full data.
- ZW25
- ZW32
- ZW40
- ZW50
- ZW65
- ZW80
- ZW100
- ZW150
- ZW200
Logarithmic scales. Published catalogue data for clean water; the correct model for your duty is confirmed by our engineers.
Dimensions & weight
Net weight and the main dimensions of each model, in millimetres, from the catalogue. Open a model for the labelled dimension drawing.
| Model | Weight (kg) | Inlet DN | Outlet DN |
|---|---|---|---|
| 25ZW(F)5-12 | 65 | 25 | 25 |
| 25ZW(F)8-18 | 77 | 25 | 25 |
| 32ZW(F)5-12 | 67 | 32 | 32 |
| 32ZW(F)5-20 | 78 | 32 | 32 |
| 32ZW(F)10-10 | 70 | 32 | 32 |
| 32ZW(F)8-18 | 78 | 32 | 32 |
| 32ZW(F)10-20 | 81 | 32 | 32 |
| 32ZW(F)10-30 | 92 | 32 | 32 |
| 40ZW(F)10-10 | 73 | 40 | 32 |
| 40ZW(F)10-20 | 81 | 40 | 32 |
| 40ZW(F)15-10 | 75 | 40 | 32 |
| 40ZW(F)15-18 | 81 | 40 | 32 |
| 40ZW(F)15-28 | 94 | 40 | 32 |
| 40ZW(F)20-13 | 80 | 40 | 32 |
| 50ZW(F)10-20 | 82 | 50 | 40 |
| 50ZW(F)15-10 | 80 | 50 | 40 |
| 50ZW(F)15-18 | 82 | 50 | 40 |
| 50ZW(F)15-28 | 95 | 50 | 40 |
| 50ZW(F)20-13 | 82 | 50 | 40 |
| 50ZW(F)20-40 | 180 | 50 | 40 |
| 65ZW(F)25-30 | 170 | 65 | 65 |
| 65ZW(F)25-40 | 180 | 65 | 65 |
| 65ZW(F)30-20 | 142 | 65 | 65 |
| 65ZW(F)40-25 | 172 | 65 | 65 |
| 80ZW(F)40-16 | 142 | 80 | 65 |
| 80ZW(F)40-25 | 172 | 80 | 65 |
| 80ZW(F)45-15 | 220 | 80 | 65 |
| 80ZW(F)65-15 | 240 | 80 | 65 |
| 80ZW(F)65-25 | 265 | 80 | 65 |
| 80ZW65-35 | 350 | 80 | 65 |
| 100ZW80-20 | 345 | 100 | 80 |
| 100ZW100-16 | 325 | 100 | 80 |
| 100ZW100-20 | 346 | 100 | 80 |
| 100ZW100-30 | 370 | 100 | 80 |
| 100ZW100-35 | 385 | 100 | 80 |
| 150ZW150-15 | 380 | 150 | 125 |
| 150ZW150-20 | 380 | 150 | 125 |
| 150ZW200-15 | 465 | 150 | 150 |
| 150ZW200-20 | 530 | 150 | 150 |
| 150ZW200-30 | 680 | 150 | 150 |
| 200ZW300-15 | 640 | 200 | 150 |
| 200ZW300-20 | 660 | 200 | 150 |
Spare parts for ZW self-priming
Typical wear and service parts for this type of pump. The exact part, material and part number depend on the model, so send us the model code (or a nameplate photo) and we confirm and quote the right one.
| Part | What it does | |
|---|---|---|
| Mechanical seal | Seals the shaft; the most frequently replaced part | |
| Impeller | Open or semi-open impeller that passes solids; wears with sand | |
| Flap / check valve | Holds the priming water in the casing | |
| Wear plate | Keeps the impeller clearance; adjust or replace when worn | |
| O-rings and gaskets | Seal the cover and joints | |
| Bearings | Carry the shaft; replace on noise or heat |
Materials of construction
| Pos. | Designation | Material | AISI/ASTM |
|---|---|---|---|
| 1 | Motor | ||
| 2 | Pump head | Cast iron | ASTM 25B |
| 3 | Shaft | Stainless steel | |
| 4 | Double-end mechanical seal (<15 kW) | SiC/SiC + SiC/SiC/F | |
| 4 | Double-end mechanical seal (>15 kW) | C/SiC + SiC/SiC/F | |
| 5 | Skeleton oil seal (<5.5 kW) / sliding bearing, shaft sleeve (≥5.5 kW) | YG8 / YG6 | |
| 6 | Pump cover | Cast iron | ASTM 25B |
| 7 | Impeller | Cast iron | ASTM 25B |
| 8 | Pump body (inlet <DN100) | Cast iron | ASTM 25B |
| 8 | Pump body (inlet ≥DN100) | Ductile iron | |
| 9 | Outlet flange | Cast iron | ASTM 25B |
| 10 | Inlet valve | NBR + Q235A | |
| 11 | Inlet flange | Cast iron | ASTM 25B |
| 12 | Drain cover | Cast iron | ASTM 25B |
| 13 | Base plate | Q235A |
Generic list for this pump type; it is not a part-number catalogue for the series. Our team confirms the correct part for your model before quoting.
Specification & options
Key parameters
- Liquid temperatureUp to 40 °C (ambient also 40 °C or less)
- Liquid pH5–9
- Liquid density1.2 × 10³ kg/m³ or less
- Self-priming heightMust not exceed the rated value; total suction pipe length not above 10 m
- Passing capacitySuspended particle diameter up to 60 % of the pump diameter; fibre length up to 5 times the pump diameter
- Altitude / ambientAbove 1000 m or 40 °C: derate motor output (P2 falls to about 70 % at 3500 m / 80 °C)
- FlangeDIN, PN10
- Model key25 ZW(F) 5-12: inlet diameter mm, ZW non-clogging self-priming sewage pump (F = stainless flow parts), rated flow m³/h, rated head m
Product range
| Rated flow (m³/h) | 5 | 10 | 15 | 20 | 25 | 30 | 40 | 65 | 100 | 150 | 200 | 300 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Flow range (m³/h) | 3–10 | 7–13 | 10–20 | 14–26 | 18–32 | 21–39 | 28–52 | 45–65 | 70–120 | 120–180 | 160–220 | 240–350 |
| Max pressure (bar) | 3 | 3 | 2 | 2 | 4 | 2 | 3 | 3 | 4 | 4 | 4 | 3 |
| Highest efficiency (%) | 35 | 42 | 46 | 42 | 53 | 57 | 60 | 65 | 65 | 60 | 65 | 65 |
Materials
| Pos. | Designation | Material | AISI/ASTM |
|---|---|---|---|
| 1 | Motor | ||
| 2 | Pump head | Cast iron | ASTM 25B |
| 3 | Shaft | Stainless steel | |
| 4 | Double-end mechanical seal (<15 kW) | SiC/SiC + SiC/SiC/F | |
| 4 | Double-end mechanical seal (>15 kW) | C/SiC + SiC/SiC/F | |
| 5 | Skeleton oil seal (<5.5 kW) / sliding bearing, shaft sleeve (≥5.5 kW) | YG8 / YG6 | |
| 6 | Pump cover | Cast iron | ASTM 25B |
| 7 | Impeller | Cast iron | ASTM 25B |
| 8 | Pump body (inlet <DN100) | Cast iron | ASTM 25B |
| 8 | Pump body (inlet ≥DN100) | Ductile iron | |
| 9 | Outlet flange | Cast iron | ASTM 25B |
| 10 | Inlet valve | NBR + Q235A | |
| 11 | Inlet flange | Cast iron | ASTM 25B |
| 12 | Drain cover | Cast iron | ASTM 25B |
| 13 | Base plate | Q235A |
Technical data
Liquid temperature
- Up to 40 °C (ambient also 40 °C or less)
Typical applications
- Municipal sewage and sewage treatment (environmental protection), paper, textile and dyeing industry, river and pond farming
- liquids with suspended particles and fibres
Data basis
- CNP ZW, ZWF catalogue E220905, pp. 1–17
Performance values are taken from the published CNP catalogue data. Our engineers confirm the final selection for your liquid, temperature, supply and site before quoting.
