6
3. Applications
Contents:
3.1 System types
3.2 Pumped liquids
3.3 System pressure
3.4 Relative air humidity (RH)
3.5 Enclosure class
3.6 Inlet pressure
3.1 System types
Fig. 2
Pumped liquids and operating conditions
GRUNDFOS ALPHA2 L is suitable for
•
systems with
constant
or
variable flows
where it is desirable to
optimise the setting of the pump duty point
•
systems with
variable flow-pipe temperature
.
3.2 Pumped liquids
Clean, thin, non-aggressive and non-explosive liquids, not containing
solid particles, fibres or mineral oil. See fig.
In
heating systems
, the water should meet the requirements of accepted
standards on water quality in heating systems, e.g. the German standard
VDI 2035.
T
M
05
19
23
45
1
2
Max. 1.0 MPa (10 bar)
75 °C
Min.
0.005 MPa
0.05 bar
90 °C
110 °C
Min.
0.028 MPa
0.28 bar
Min.
0.108 MPa
1.08 bar
Max. 95% RH
IP 42
0.0
0.4
0.8
1.2
1.6
2.0
2.4
Q [m³/h]
0
2
4
6
[m]
H
0
20
40
60
[kPa]
p
0.0
0.2
0.4
0.6
Q [l/s]
ALPHA2L XX-50
ALPHA2L XX-40 / ALPHA2L XX-45
ALPHA2L XX-60
22
PHA22
2
2
2
PHA2
PHA2
AL
AAL
AL
ALPHA2 L
2
PHA22
2
PHA2
PHA2
AL
AL
AL
ALPHA2 L
Warning
The pump must not be used for the transfer of flammable liquids
such as diesel oil, petrol and similar liquids.
