Festo CPVSC1-VI Manual page 55

4. Commissioning
Festo P.BE−CPVSC−EN en 0301a
The auxiliary pilot air must reach a pressure of 3...7 bar as
soon as it is switched on, otherwise the valve cannot be guar
anteed to switch immediately.
If the pressure is less than 3 bar, there may be a delay before
the valve is switched, in spite of anelectrical signal being
present. The slow increase in pressure of the complete supply
does not then affect the actuator. The actuator would react
suddenly (e.g. a cylinder would extend or retract, depending
on the valve function).
82/84
14
1
12/14
1
Externally supplied auxiliary pilot air (3...7 bar),
branched in front of the safety start−up valve
2
Safety start−up valve (slow build up of pressure of
complete supply)
Fig. 4/1: Example of valve−cylinder combination with slow
increase in pressure of the complete supply
4 2
5 3
1
1
2
4−5