Benchmark Alpha E-Tec Plus 28 Installation And Servicing Instruction page 8

3.5.1 E-Tec Plus 28 Available Pump Head and Power Consumption
7
6
5
4
3
2
1
0
0
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)
3.5.2 E-Tec Plus 33 Available Pump Head and Power Consumption
7
6
5
4
3
2
1
0
0
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)
8
Alpha E-Tec Plus 28, 33 and 38 - Technical Data
A
C
200 400
A
C
D
200 400
D
600 800 1000
Flow rate (l/h)
Fig. 3.1
B
600 800 1000
Flow rate (l/h)
Fig. 3.2
B
1200 1400
1200 1400
70
60
50
40
30
20
10
0
1600
70
60
50
40
30
20
10
0
1600