The GRUNDFOS CR pump range are of vertical multistage in-line centrifugal design suitable for a wide range of water supply, irrigation, liquid transfer and boosting applications. The pumps are of heavy duty construction and are designed for continuous duty in commercial and industrial installations. All vital components including the impellers, intermediate chambers and shaft are made from stainless steel and the top and bottom housings from cast iron. The pump is water lubricated and is provided with a tungsten carbide faced mechanical shaft seal.
For aggressive liquids, the 'N' version is available which features stainless steel top and bottom pump housings.
MOTOR
The pumps are coupled to a high efficiency 'Blue flux' totally enclosed fan cooled 2-pole GRUNDFOS motors complying with IEC and DIN standards. All motors mut be connected to an effective motor starter in accordance with local regulations.
Enclosure Class: IP55
Insulation Class: F
Voltage: 3x380-415 V
Speed: 2900 rpm
OPERATING CONDITIONS
Pumped liquids: Thin, clean, non-aggressive and non-explosive liquids without solid particles or fibres.
Liquid Temperature Range: - 20°C to +120°C
Max Ambient Temperature: +60°C
Max Suction Lift: According to the NPSH curve plus a safety margin of 1m.
Max Operating Pressure: Models up to CR20-10 -16Bar, CR20-14 and CR20-17 - 25Bar
PUMP DATA
| Model |
Motor |
Full Load Current (A) |
Istart/I |
Dimensions (mm) |
Weight (kg) |
| kW |
HP |
B1 |
B2 |
B1 + B2 |
D1 |
D2 |
D3 |
| CR 20-3* |
4 |
5.5 |
8 |
9.1 |
465 |
372 |
837 |
220 |
134 |
|
64 |
| CR 20-5* |
5.5 |
7.5 |
11 |
9.3 |
587 |
391 |
978 |
220 |
134 |
300 |
88 |
| CR 20-7* |
7.5 |
10 |
15.2 |
9.5 |
677 |
391 |
1068 |
220 |
134 |
300 |
93 |
| CR 20-10** |
11 |
15 |
21.5 |
7.7 |
889 |
464 |
1353 |
260 |
172 |
300 |
129 |
| CR 20-14** |
15 |
20 |
28.7 |
6 |
1069 |
478 |
1547 |
306 |
197 |
352 |
150 |
| CR 20-17** |
18.5 |
25 |
35 |
7.2 |
1204 |
478 |
1682 |
306 |
197 |
352 |
165 |
* with Oval flanges
** with DIN flanges
