3 Mounting and installation
68 Festo – P.BE-MPA-EN – 1309f – English
3.6.5 Controller with rigid threaded connection (MPA1)
In the size M PA1, there are c ontrollers with rigid threaded connection M5. A non-return valve (type
HB-M5-QS-4) can be screwed into this threaded connection. As a result, connection of an external pres-
sure gauge or measuring device is possible through a hose.
1
1 Threaded connection M5
Fig. 3.10 Controller with rigid threaded connection
3.6.6 Vacu u m/low-pressu r e operation
Note
If valves are used for switching a vacuum, filters must be used in the suctio n line to
avoid operat ive malfunctions caused by foreign mat ter sucked into the line.
The 2x 2/2-directional control valves with ident. code D, I and the 2x 3/2-directional
control valves with ident. code N, K, H are not suitable for vacuum or low pressure oper-
ation. If you supply the MPA-S valve terminal with vacuum or low pressure via port (1):
• Operate these valves in a separate pressure zone.
•Set
the
operating pressure for this pressure zone in accordance with the diagram in
Fig. A.1
.
The following requirements must be fulfilled in order to operate your MPA-S valve terminal at the supply
port (1) with vacuum or low pressure between –0.9 ... 3 bar:
– The pilot co ntrol is operated with regulated external pilot air supply.
– The valve terminal is fitted with the following valve sub-bases and sometimes has additional pres-
sure zones.
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