Pump Performance - Grundfos DMX 221 Instrucciones De Instalación Y Funcionamiento

9.3.3 Pump performance

Dosing flow and maximum counterpressure
The values in the table below apply to the following conditions:
• maximum counterpressure at the outlet valve. Take the pressure losses along the outlet line
to the injection point into account.
• dosing medium with viscosity and density similar to those of water
• flooded suction 0.5 m
• fully deaerated dosing head
• stroke length 100 %
• three-phase 400 V motor.
Pump type
DMX 4-10
DMX 7-10
DMX 9-10
DMX 12-10
DMX 17-4
DMX 25-3
*1
DMX 7.2-16
DMX 8-10
DMX 14-10
DMX 18-10
DMX 26-10
DMX 39-4
DMX 60-3
*1
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
*1 Operating the pump at a counterpressure of 16 bar will reduce the life of the dosing dia-
phragm.
Stroke volume and stroke rate
The values in the table below apply to the following conditions:
Maximum dosing flow
50 Hz 60 Hz
[l/h] [l/h] [US gph]
4 5 1.3
7 8 2.1
9 11 2.9
12 14 3.7
17 20 5.3
27 32 8.5
7.2 9 2.3
8 10 2.6
14 17 4.5
18 22 5.8
26 31 8.2
39 47 12.4
60 72 19.0
13.7 16 4.3
16 19 5.0
15.7 19 5.0
27 32 8.5
26.8 32 8.5
35 42 11.1
50 60 15.8
75 90 23.8
115 138 36.5
Maximum counterpressure
[bar] [psi]
10 145
10 145
10 145
10 145
4 58
3 43
16 232
10 145
10 145
10 145
10 145
4 58
3 43
16 232
10 145
12 174
10 145
12 174
10 145
10 145
4 58
3 43
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