User guide

page 57 of 102
non-return valve closed non-return valve open
Notes: If the system pressure is increasing, the port with the lowest preset
pressure is closed rst. At decreasing system pressure the port with high-
est preset pressure is opened rst.
Status of
non-return valve
System pressure in local vacuum network (mbar)
20 40 60 80 100 120 140 160 180 200 220 240 260 280 300
Application 1 250
Application 2 100
Application 3 35
preset pressure
(mbar)