Vertical multistage centrifugal pump
CDM3-31
CDM / CDMF · 50 Hz · also listed as CDMF3-31
CDM3-31 is a vertical multistage centrifugal pump from the CNP CDM / CDMF range (50 Hz). Rated 3 kW, 1.2–4.4 m³/h, head 106–235 m. Net weight 59 kg.
- CDM for non-corrosive, CDMF for lightly corrosive liquids
- Boosting, pressurising, HVAC and water treatment
- Hot-water type available (up to +120 °C)
Performance curve Curve-based
Efficiency, shaft power and NPSHr are not published for this model in the source catalogue.
Head versus flow at 50 Hz, 2900 rpm, clean water. Source: Performance table printed p. 13; dimensions p. 37.
| Flow (m³/h) | Head (m) |
|---|---|
| 0 | 235 |
| 1.2 | 230 |
| 1.6 | 224 |
| 2 | 216 |
| 2.4 | 207 |
| 2.8 | 194 |
| 3 | 187 |
| 3.2 | 178 |
| 3.6 | 159 |
| 4 | 134 |
| 4.4 | 106 |
Dimensions & weight
| Code | Description | Value |
|---|---|---|
| H1 | pump height | 797 mm |
| H2 | motor height | 345 mm |
| H | overall height, flange | 1217 mm |
| H_oth | overall height, other connections | 1192 mm |
| D1 | motor diameter | 197 mm |
| D2 | base / flange width | 132 mm |
| weight_cdmf_kg | Net weight CDMF | 55 mm |
| — | Net weight | 59 kg |