KSB UPA Installation & Operating Manual page 58

Vertical
installation
Horizontal
installation
58 of 98
6 Commissioning/Start-up/Shutdown
The submergence X of the pump sets must be ≥ 0.5 m for the following examples of
vertical and horizontal installation.
A higher submergence may be required by the NPSH value specified in the order
documentation or the value indicated in the following diagram.
2,0
1,5
X
1,0
m
0,5
0,0
0 100 200
0 50
Fig. 24: Minimum submergence depending on the flow rate
The values in the above mentioned diagram apply to submersible borehole pumps up
to size UPA 350.
For larger pump sets refer to the value X in the order documentation or the data
sheet. Contact the manufacturer, if required.
NOTE
The fluid level in the well is usually measured with a water level contact meter (well
dipper).
Measurement for vertical installation:
upper edge of the pump to lowest (dynamic) fluid level
X = H - H
e t
D
Fig. 25: Minimum submergence for vertical installation
T Well depth
D Well diameter
H Installation depth of the pump set
e
X Minimum submergence
Measurement for horizontal installation:
upper edge of the suction strainer to lowest (dynamic) fluid level
UPA / UPA S
300 500
3
Q m /h
100 Q l/s 150
H Static fluid level
h
H Dynamic fluid level
t
H Height of switchgear above the
geo
static water level in the well
600 700 800
200