Performance Curves; Guide To Performance Curves; Curve Conditions - Grundfos ALPHA1 15-50 Bedienungsanleitung

10. Performance curves

10.1 Guide to performance curves

Each pump setting has its own performance curve.
A power curve, P1, belongs to each performance curve. The
power curve shows the pump power consumption in watt at a
given performance curve.
The P1 value corresponds to the value that you can read from the
pump display. See fig. 26.
H
P1
Fig. 26 Performance curves in relation to pump setting
Setting Pump curve
PP1 Lowest proportional-pressure curve
PP2 Intermediate proportional-pressure curve
PP3 Highest proportional-pressure curve
CP1 Lowest constant-pressure curve
CP2 Intermediate constant-pressure curve
CP3 Highest constant-pressure curve
III Constant curve or constant speed III
II Constant curve or constant speed II
I Constant curve or constant speed I
For further information about pump settings, see this section:
7. Control functions
20
PP3
CP3
PP2
CP2
PP1
CP1
II
I
II
I

10.2 Curve conditions

The guidelines below apply to the performance curves on the
following pages:
• Test liquid: airless water.
• The curves apply to a density of 983.2 kg/m
temperature of 60 °C.
• All curves show average values and must not be used as
guarantee curves. If a specific minimum performance is
required, individual measurements must be made.
• The curves for speeds I, II and III are marked.
• The curves apply to a kinematic viscosity of 0.474 mm
(0.474 cSt).
• Curves are obtained according to EN 16297.
III
Q
III
Q
3
and a liquid
2
/s