Festo CDVI-DN Description page 59

3. Installation
Festo P.BE-CDVI-EN en 1202e
Caution
In the case of several systems with centrally ducted ex-
haust air, back pressures in the common exhaust tubing
(3/5) or (82/84) can lead to functional impairments of the
CDVI.
Use non-return valves in the common exhaust lines (3/5)
•
and (82/84).
Central (82/84)
System 1
Common (3/5)
Common
(82/84)
Pressure
compen-
sation
Common (3/5)
Valve terminal
Fig. 3/5: Common lines with non-return valves
Central pressure compensation
Pressure
compen-
sation
Common (3/5)
Common (82/84)
Central (3/5)
System 2
Valve terminal
3-21