Festo MPA-ASI Series, Manual

Page: 36 / 208

1. Summary of components
1−18
Festo P.BE−MPA−EN en 0802c
Pressure zone separation
The MPA−S valve terminal can be equipped with pressure
zones.
The pressure zones are formed either by special sub−bases or
by special isolating seals.
Separation of the pilot channels 12 and 14 is not intended,
as on the MPA−S valve terminal the air supply for the pilot
control of the valves is supplied centrally via the pneumatic
interface or the multipin sub−base.
Pressure zone separation with sub−bases
Sub−base for the propor
tional pressure regulator The sub−base (type VMPA−...) for the proportional pressure
regulator always has a pressure zone separation and this is
not therefore marked additionally on the exterior of the sub−
base. Pressure zone separation takes place:
for channel 1 on the left−hand side of the sub−base.
for channels 3 and 5 on the left−hand and on the right−
hand side of the sub−base.
If the proportional pressure regulator is to regulate the op
erating pressure for the valves on the MPA−S valve terminal,
the valves must be positioned to the right of the propor
tional pressure regulator.
Sub−bases for the valves On the sub−bases with integrated pressure zone separation
the separation is made in the centre of the sub−base, i.e.
onthe
MPA1: after the second valve position
MPA2: after the first valve position.
The sub−bases are available in the following designs:
only supply channel (1) separate
supply channel (1) and exhaust channels (3 and 5)
separate.