51
WORKING HEAD
Working head (kPa)
W
ater flow rate (l/s)
Operating range
Standard working head pumps
W
orking head is that at the pumping module outlet reduced by all pressure losses inside the unit.
The graph below illustrates for the pumping module the working head values in kPa depending on the flow rate in liters/second.
The operating range is
delimited by the minimum and maximum values given in the next table. The graphs are referred to units operating with water at the temperature of 10°C (density 1000 kg/m
3
).
MODELS
40.2
50.2
60.2
70.2
80.2
90.2
100.2
115.2
130.2
145.2
160.2
180.2
UM
NOTE
Graphic refer
1
1
2
3
4
5
6
7
8
9
10
11
-
Q
= W
ater
flow rate
Lower limit value
Q
1,33
1,33
1,47
1,78
2,05
2,43
2,78
3,12
3,38
3,87
4,20
4,79
l\s
Upper limit value
Q
3,85
3,85
4,00
4,36
4,61
7,00
7,29
7,48
7,80
9,32
9,58
11,0
l\s
150
175
200
225
250
275
300
325
350
375
400
0
25
50
75
100
125
1,
0
1,
5
2,
0
2,
5
3,
0
3,
5
4,
0
4,
5
5,
0
5,
5
6,
0
6,
5
7,
0
7,
5
8,
0
8,
5
9,
0
9,
5
10,
0
10,
5
11
,0
11,
5
12,
0
12,
5
13,
0
1
2
3
4
5
6
7
8
9
10
11
