Festo VTSA Series Description page 142

5. Maintenance and conversion
Mounting
5−8
Fig. 5/1: Removing valves or cover plates
Proceed as follows:
1. Make sure the seal is not damaged. Replace seals if they
are damaged.
2. Make sure that the seals are seated correctly.
The cord seal between the manifold sub−base and the
component must be seated in the recess of the com
ponent.
3. Place the component on the manifold sub−base.
4. Screw the component at first only lightly and then tighten
with the following tightening torque:
Valve width 18 mm (VSVA−...−A2): 1.0 Nm (± 10 %)
Valve width 26 mm (VSVA−...−A1): 2.0 Nm (± 10 %)
Valve width 42 mm (VSVA−...−D1): 3.0 Nm (± 20 %)
Valve width 52 mm (VSVA−...−D2): 6.5 Nm (± 20 %)
Festo P.BE−VTSA−44−EN en 0905e