Approximate Values When Using Pulsation Dampers - Grundfos DMH 28X Manual Del Usuario

6.4 Approximate values when using pulsation
dampers
Risk of damage to the system!
It is always recommended to use pulsation dampers
for large high-speed pumps!
Caution
Since the pulsation is influenced by many factors, a
system-specific calculation is essential. Request a
calculation from our calculation program.
The table below indicates the approximate values and the suction
line length for which suction pulsation dampers are required. The
values apply to 50 Hz operation when water or similar liquids are
dosed.
Stroke rate
Pump type
[n/min]
DMH 280
DMH 0.6-200 29
DMH 1.3-200 63
DMH 2.2-200 96
DMH 2.5-200 120
DMH 3.3-200 144
DMH 281
DMH 2-100 29
DMH 4.2-100 63
DMH 6.4-100 96
DMH 8-100 120
DMH 9.6-100 144
DMH 283
DMH 10-100 26
DMH 19-100 54
DMH 27-100 75
DMH 33-100 92
DMH 40-100 112
DMH 55-100 153
DMH 285
DMH 20-100 28
DMH 40-100 56
DMH 52-100 73
DMH 70-100 98
DMH 80-100 112
DMH 105-100 146
DMH 286
DMH 170-50 112
DMH 222-50 146
DMH 85-50 56
DMH 111-50 73
20
Maximum
Nominal
length of
width of
suction line
suction line
[m]
DN 4 8
DN 4 8
DN 4 8
DN 4 8
DN 4 8
DN 8 8
DN 8 8
DN 8 8
DN 8 8
DN 8 8
DN 20 8
DN 20 8
DN 20 8
DN 20 8
DN 20 8
DN 20 6
DN 20 8
DN 20 8
DN 20 8
DN 20 6
DN 20 5
DN 20 3
DN 20 2.5
DN 20 1.5
DN 20 2.5
DN 20 2.5
Stroke rate
Pump type
[n/min]
DMH 287
DMH 9-200 28
DMH 18-200 56
DMH 23-200 73
DMH 31-200 98
DMH 36-200 112
DMH 50-200 146
DMH 288
DMH 3-200 26
DMH 7.5-200 54
DMH 10-200 75
DMH 13-200 92
DMH 15-200 112
DMH 21-200 153
Maximum
Nominal
length of
width of
suction line
suction line
[m]
DN 8 8
DN 8 8
DN 8 4
DN 8 3
DN 8 2
DN 8 1
DN 8 8
DN 8 8
DN 8 4
DN 8 3
DN 8 2
DN 8 1