Suction Lift - Grundfos DMX 221 Installations- Und Bedienungsanleitung

9.3.4 Suction lift

The suction lift is the height difference between the medium level in the tank and the inlet valve.
Suction lift for dosing medium with viscosity similar to that of water
The values in the table below apply to the following conditions:
• Newtonian liquid
• density similar to that of water.
The values in the table are in m, they have to be decreased for dosing media with higher
density.
• non-degassing and non-abrasive liquid
• stroke length: 100 %
• counterpressure: 1.5 to 3 bar
• inlet line and dosing head filled (continuous operation).
For priming with wetted valves with inlet line and dosing head not filled, the values have to
be reduced by approximately 1 m.
Pump type
DMX 4-10
DMX 7-10
DMX 9-10
DMX 12-10
DMX 17-4
DMX 25-3
DMX 7.2-16
DMX 8-10
DMX 14-10
DMX 18-10
DMX 26-10
DMX 39-4
DMX 60-3
DMX 13.7-16
DMX 16-10
DMX 16-12
DMX 27-10
DMX 27-12
DMX 35-10
DMX 50-10
DMX 75-4
DMX 115-3
Suction lift for dosing medium with maximum viscosity
The values in the table below apply to the following conditions:
• Newtonian liquid
• density similar to that of water
Maximum primed suction lift
50 Hz
[m]
4
4
3
3
1
1
4
4
4
3
3
1
1
4
4
4
4
4
3
3
1
1
DMX 221 | | 43
60 Hz
[m]
4
4
3
3
1
1
4
4
4
3
3
1
1
3.5
3.5
3.5
3.5
3.5
2.5
2.5
0.5
0.5