Marine Catalogue 2011

Accessories: Pumps
In order to ensure the necessary water flow in your application,
please respect the pump curves:
■ By measuring the pressure difference in between inlet and outlet of the pump, the overall flow
through the system can be determined by using the provided pump curves (Graphic 1 – 5 )
■ Operating the pumps outside the limits of the pump curves may result in motor overload or
cavitation. These cases are excluded from Webasto warranty.
■ The pump models WB 1000 G and WB 500 G have to be pre-filled before the first start-up and
after long downtimes.
50 Hz water pump curves
Head (m)
Q (gpm)
0 5 10 15 20 25
18
16
14
12
10
4
8
8
6
4
180
160
140
120
100
80
60
40
2
6
20
3
0 2
0
1
5
7
0 10 20 30 40 50 60 70 80 90 100
Q (l/min.)
∆p (kPa)
Head (m)
Q (gpm)
0 10 20 30 40 50 60 70 80 90
25
150
20
200
15
150
6
10
100
2
5
5
50
3
0
4
0
1
0 50 100 150 200 250 300 350
Q (l/min.)
∆p (kPa)
--- Centrifugal - - - Self-priming --- Centrifugal - - - Self-priming
Graphic 1 50 Hz up to 100 l / min.
1 WB 250
2 WB 350
3 WB 500
4 WB 500 G
5 WB 1000
6 WB 1000 G
7 WB 1500
8 WB 2500 G
Graphic 2 50 Hz up to 300 l / min.
1 WB 2000
2 WB 3000 G
3 WB 4000
4 WB 3500
5 WB 5600
6 WB 5500 G
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