Maximum flow Q
max
A) The following values are only applicable to Q
max
when using metering pumps with properly dimen‐
sioned pulsation dampers or with constant flow velocity:
Valve type DHV-U
Q
max
for H
2
O at 20 °C
l/h
DN 10
500
DN 15
890
DN 20
1000
DN 25
1300
DN32
2100
DN40
3800
B) The following applies for the flow Q
u
when operating metering pumps without a pulsation damper:
For solenoid metering pump: Q
u
= Q
max
/20
For motor-driven metering pumps: Q
u
= Q
max
/3
Technical data
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