Vacuum/Low Pressure Operation - Festo VTSA Series Description

3. Installation

3.3.8 Vacuum/low pressure operation

Festo P.BE−VTSA−44−EN en 0905e
Note
If valves are used for switching a vacuum, then filters must
be used in the suction line to avoid operative malfunctions
caused by foreign matter sucked into the line.
Valves with identifier T32C−A, T32H−A, T32U−A (2x3/2−way
valves) are not suitable for vacuum or low−pressure operation
if they are supplied via port (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 Appendix A,
Fig. A/1.
The following conditions must be fulfilled before you can op
erate the VTSA... valve terminal at supply port (1) with vacuum
or low pressure between 0.9 ... 3 bar:
The pilot control is operated with an external pilot air
supply.
The valve terminal is fitted with the following valve sub−
bases and sometimes has additional pressure zones.
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