Festo VTSA Series Description page 111

3. Installation
1
Valve terminal 1
2
Exhaust tubing
3/5
3
Central pilot
exhaust tubing
4
Central exhaust
tubing 3/5
5
Valve terminal 2
6
Pilot air exhaust
tubing
Fig. 3/8: Centrally ducted exhaust air with non−return valves
Festo P.BE−VTSA−44−EN en 0905e
Observe the following instructions for installing the pneu
matic components. Only then can you guarantee trouble−free
operation.
Note
In the case of several systems with centrally ducted ex
haust air:
Use non−return valves in the exhaust tubing or pilot ex
·
haust air tubing in order to prevent malfunctions due to
back pressures.
1 3 4
2
2
6
6
2
5
3−35