Benchmark Alpha E-Tec Plus 28 Installation And Servicing Instruction page 9

3.5.3 E-Tec Plus 38 Available Pump Head and Power Consumption
7
A
6
5
4
3
2
1
0
0 200
A+B = Head available with by-pass closed
B = Head available with by-pass open
C+D = Power consumed by the pump with by-pass open (dotted area)
D = Power consumed by the pump with by-pass closed (dotted area)
D
400 600
C
B
800 1000
Flow rate (l/h)
Fig. 3.3
Alpha E-Tec Plus 28, 33 and 38 - Technical Data
1200 1400 1600
70
60
50
40
30
20
10
0
9