Vertical cooling-tower circulation pump
LLT125-5/4
LLT (coaxial) · 50 Hz
LLT125-5/4 is a vertical cooling-tower circulation pump from the CNP LLT (coaxial) range (50 Hz). Rated 4 kW, 120–200 m³/h, head 3–7 m. Net weight 83 kg.
- Large flow, low head: 30–300 m³/h, up to 8.9 m
- Liquid temperature -15 to +100 °C, working pressure up to 6 bar
- Coaxial structure, small footprint, in-line DN65–DN150 flanges
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, 1450 rpm, clean water. Source: Performance table and installation dimensions, printed pp. 9-10.
| Flow (m³/h) | Head (m) |
|---|---|
| 120 | 6.5 |
| 130 | 6.1 |
| 140 | 5.7 |
| 150 | 5.2 |
| 160 | 5 |
| 170 | 4.3 |
| 180 | 4.1 |
| 190 | 3.7 |
| 200 | 2.7 |
Dimensions & weight
| Code | Description | Value |
|---|---|---|
| A | pump length | 560 mm |
| B1 | lower section height: base to motor flange | 145 mm |
| B2 | upper section height: motor | 195 mm |
| H | overall height | 731 mm |
| A1 | mounting | 200 mm |
| A2 | mounting | 240 mm |
| d1 | mounting hole | 15 mm |
| H1 | inlet axis height | 170 mm |
| H2 | H2 | 140 mm |
| H3 | H3 | 30 mm |
| DN | inlet / outlet flange | 125 mm |
| d | flange inner bolt circle | 184 mm |
| K | bolt circle | 210 mm |
| D | flange outer diameter | 250 mm |
| alpha | α — bolt angle (°) | 22.5 mm |
| bolts | Number of flange bolts | 8 mm |
| bolt_dia | Bolt hole diameter | 18 mm |
| — | Net weight | 83 kg |