User Manual

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Siemens Control device PN40, safety function to DIN EN 14597 CE1N4388en
Smart Infrastructure 2020-01-09
Sizing
p
max
= Maximum permissible differential pressure across the valve, valid for the entire actuating
range of the motorized valve
p
v100
= Differential pressure across the fully open valve and the valve’s control path by a volume
flow V
100
V

100
= Volume flow through the fully open valve (H
100
)
100 kPa = 1 bar  10 mWC
1 m
3
/h = 0.278 l/s water at 20 °C
Flow diagram
Valve flow
characteristic