Festo MPA-FB Series, Manual

Page: 65 / 168

3. Installation
3−19
Festo P.BE−MPA−EN en 0502b
3.3.3 Vacuum/low pressure operation
Please note
Valve plates with Ident. code N, K, H (2 x 3/2−way valves) and
D (2 x 2/2−way valves) are not suitable for vacuum or low
pressure operation if they are supplied via connection 1.
·
Operate these valves in a separate pressure zone.
·
The operating pressure for this pressure zone must be
set in accordance with the diagram in Fig.A/1.
The following conditions must be fulfilled before you can op
erate your MPA valve terminal at supply connection 1 with
vacuum or low pressure between − 0.9 ... 3 bar:
The pilot control of the valve solenoid coils is operated
with external closed−loop regulated auxiliary pilot air.
The valve terminal is fitted with the following valve plates:
3/2−way valve, external pressure supply (Ident. code
W and X).
These valves can be supplied individually and there
fore operated in the pressure range − 0.9 ... 10 bar.
5/2−way valve, single−solenoid (Ident. code M)
5/2−way valve, double−solenoid (Ident. code J)
5/3−way valves (Ident. codes B, E and G)