Grundfos DMH 25 Series User Manual

20
9.4 Approximate values when using pulsation
dampers
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.
Caution
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 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.
Pump type
Stroke rate
[n/min]
Nominal
width of
suction line
Maximum
length of
suction line
[m]
DMH 251
DMH 2.4-10 14 DN 8 8
DMH 5-10 29 DN 8 8
DMH 13-10 63 DN 8 3
DMH 19-10 96 DN 8 1.5
DMH 24-10 120 DN 8 1
DMH 2.3-16 14 DN 8 8
DMH 4.9-16 29 DN 8 8
DMH 12-16 63 DN 8 3
DMH 18-16 96 DN 8 1.5
DMH 23-16 120 DN 8 1
DMH 2.2-25 14 DN 8 8
DMH 4.5-25 29 DN 8 8
DMH 11-25 63 DN 8 3
DMH 17-25 96 DN 8 1.5
DMH 21-25 120 DN 8 1
DMH 252
DMH 11-10 29 DN 8 8
DMH 24-10 63 DN 8 2
DMH 37-10 96 DN 8 1
DMH 46-10 120 DN 8 1
DMH 10-16 29 DN 8 8
DMH 23-16 63 DN 8 2
DMH 36-16 96 DN 8 1
DMH 45-16 120 DN 8 1
DMH 54-16 144 DN 8 1
DMH 253
DMH 21-10 29 DN 20 8
DMH 43-10 63 DN 20 8
DMH 67-10 96 DN 20 6
DMH 83-10 120 DN 20 4
DMH 100-10 144 DN 20 3
DMH 254
DMH 50-10 26 DN 20 8
DMH 102-10 54 DN 20 8
DMH 143-10 75 DN 20 5
DMH 175-10 92 DN 20 3
DMH 213-10 112 DN 20 1.5
DMH 291-10 153 DN 20 1
DMH 46-16 26 DN 20 8
DMH 97-16 54 DN 20 8
DMH 136-16 75 DN 20 5
DMH 166-16 92 DN 20 3
DMH 202-16 112 DN 20 1.5
DMH 276-16 153 DN 20 1
DMH 255
DMH 194-10 54 DN 20 5
DMH 270-10 75 DN 20 3
DMH 332-10 92 DN 20 1.5
DMH 403-10 112 DN 20 1
DMH 550-10 153 DN 20 1.5
DMH 257
DMH 220-10 28 DN 32 4.5
DMH 440-10 56 DN 32 4.5
DMH 575-10 73 DN 32 3
DMH 750-4 73 DN 32 1.5
DMH 770-10 98 DN 32 1.5
DMH 880-10 112 DN 32 1
DMH 1150-10 146 DN 32 0.5
DMH 1500-4 146 DN 32 0.5
Pump type
Stroke rate
[n/min]
Nominal
width of
suction line
Maximum
length of
suction line
[m]

Grundfos DMH 25 Series Specifications

General

Brand	Grundfos
Model	DMH 25 Series
Category	Water Pump
Language	English