Grundfos DMH 25X Installatie- En Bedieningsinstructies pagina 23
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Zie ook voor DMH 25X:
- Installatie- en bedieningsinstructies (52 pagina's) ,
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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!
In particular for pump types with a flow rate above
1000 l/h (DMH 257), suction and discharge pulsation
dampers should be used directly at the pump suction
Caution
and discharge ports of the pump. The size of the
suction and discharge lines should be adjusted
accordingly.
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.
Pump model /
Nominal width of
pump type
suction line
DMH 251
DMH 2,2-25
DMH 2,3-16
DMH 2,4-10
DMH 4,5-25
DMH 4,9-16
DMH 5-10
DMH 11-25
DMH 12-16
DMH 13-10
DMH 17-25
DMH 18-16
DMH 19-10
DMH 21-25
DMH 23-16
DMH 24-10
DMH 252
DMH 10-16
DMH 11-10
DMH 23-16
DMH 24-10
DMH 36-16
DMH 37-10
DMH 45-16
DMH 46-10
DMH 54-16
DMH 253
DMH 21-10
DN 20
DMH 43-10
DN 20
DMH 67-10
DN 20
DMH 83-10
DN 20
DMH 100-10
DN 20
DMH 254
DMH 50-10
DN 20
DMH 97-16
DN 20
DMH 102-10
DN 20
DMH 136-16
DN 20
DMH 143-10
DN 20
DMH 166-16
DN 20
DMH 175-10
DN 20
Maximum length
of suction line [m]
DN 8
8
DN 8
8
DN 8
8
DN 8
8
DN 8
8
DN 8
8
DN 8
3
DN 8
3
DN 8
3
DN 8
1.5
DN 8
1.5
DN 8
1.5
DN 8
1
DN 8
1
DN 8
1
DN 8
8
DN 8
8
DN 8
2
DN 8
2
DN 8
1
DN 8
1
DN 8
1
DN 8
1
DN 8
1
8
8
6
4
3
8
8
8
5
5
3
3
Pump model /
Nominal width of
pump type
suction line
DMH 202-16
DN 20
DMH 213-10
DN 20
DMH 276-16
DN 20
DMH 291-10
DN 20
DMH 255
DMH 194-10
DN 20
DMH 270-10
DN 20
DMH 332-10
DN 20
DMH 403-10
DN 20
DMH 550-10
DN 20
DMH 257
DMH 272-16
DN 32
DMH 340-16
DN 32
DMH 440-10
DN 32
DMH 450-16
DN 32
DMH 520-16
DN 32
DMH 575-10
DN 32
DMH 680-16
DN 32
DMH 750-4
DN 32
DMH 770-10
DN 32
DMH 880-10
DN 32
DMH 1150-10
DN 32
DMH 1500-4
DN 32
Maximum length
of suction line [m]
1.5
1.5
1
1
5
3
1.5
1
1.5
4.5
3
4.5
1.5
1
3
0.5
1.5
1.5
1
0.5
0.5
23
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