Product Range - Grundfos MAGNA3 Manual

MAGNA3

2. Product range

Single-head pump models
MAGNA3 32-60 F (N)
MAGNA3 32-100 F (N)
MAGNA3 40-80 F (N)
MAGNA3 40-120 F (N)
MAGNA3 40-180 F (N)
MAGNA3 50-80 F (N)
MAGNA3 50-150 F (N)
MAGNA3 65-120 F (N)
MAGNA3 65-150 F (N)
MAGNA3 80-100 F (N)
MAGNA3 100-120 F (N)
Twin-head pump models
MAGNA3 D 65-150 F
MAGNA3 D 80-100 F
MAGNA3 D 100-120 F
Pump selection
All pumps have a "best point" (η
the pump is working most efficiently.
Consider the parameters in the following section.
Pump size
The system characteristic is used together with the
performance curve of the pump for sizing and correct
pump selection.
The selection of pump size must be based on the
following:
• required maximum flow
• maximum pressure loss in the system.
Refer to the system characteristics to determine the
duty point. See fig. 7.
H
System characteristic
Fig. 7
Cast iron
115 V 230 V
98126820
98126824
98126800 98126828
98126804 98126832
98126808 98126836
98126812 98126840
98126816 98126844
98124696 98126848
- 98126852
- 98126856
- 98126860
- 98126863
- 98126864
- 98126865
), indicating where
max
Duty point
Q
Stainless steel (N)
115 V 230 V
98126822
98126826
98126802 98126830
98126806 98126834
98126810 98126838
98126814 98126842
98126818 98126846
98124702 98126850
- 98126854
- 98126858
- 98126862
- -
- -
- -
Operating conditions
You must check whether the operating conditions are
fulfilled, i.e:
• liquid quality and temperature
• ambient conditions
• minimum inlet pressure
• maximum operating pressure.
See also conditions, page 32.
Operating
Closed valve operation
A MAGNA3 pump can operate at any speed against a
closed valve for several days without damage to the
pump. However, Grundfos recommends to operate at
the lowest possible speed curve to minimize energy
losses. There are no minimum flow requirements.
Note: Do not close inlet and outlet valves
simultaneously, always keep one open when the pump
is running. Media- and ambient temperatures must
never exceed the specified temperature range.
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