Vacuum/Low Pressure Operation - Festo VTSA-44-MP Series Manual

3. Installation

3.5.5 Vacuum/low pressure operation

Festo P.BE-VTSA-44-EN en 1101f
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 ident. code K, H, and N (2x3/2-way valves) with
supply through port (1) are not suitable for vacuum or low
pressure.
– 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 oper-
ate 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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