10
MDR/EN (0909) 1.0
2.3 Min back pressure
The MDR-series demands a
certain head for good function.
Min head = 0.5 m wc or 0.05 bar
manometric pressure. If less,
install a valve in the discharge
pipe to adjust head.
2.4 Min flow required
To cool and lubricate the impeller bearing and shaft a certain flow
is required through the pump.
Min. flow
l/min
Max. system pressure
bar (20°C)
MDR45
3
3
MDR75
5
3
MDR85
7
3
MDR105
10
3
MDR116
10
3
2.5 Temperature range
P2 (PVDF) = -10°C - +100°C
P3 (PP)
= -10°C - + 85°C
2.6 Max temperature versus system pressure
Valid for P3 (polypropylene) pumps tested in water
H
Pump
1
2
4
3
10
20
30
40
50
60
70
80
90
p (bar)
MDR45 / 85 / 105 / 116
°
C
MDR75
