4. Commissioning
4-5
Festo P.BE-MPA-EN en 1108e
The pilot air supply must reach a pressure of 3 ... otherwise,
there is no guarantee Otherwise it is not ensured that the
valve will switch directly (see diagram).
If the pressure is less than 3 bar, there may be a delay before
the valve is switched, in spite of an electric signal being
present. The gradual pressure build-up of the overall supply
does not affect the actuator in that case. The actuator would
react suddenly (e.g. a cylinder would extend or retract
suddenly, depending on the valve function).
1
42
53
14 12
1
2
1
12/14
12/14
3
82/84
2
1 Externally supplied pilot air supply (3 to 8 bar),
branched before the soft-start valve
2 Safety star t-up valve (slow build up in pressure of
complete supply)
Fig. 4/1: Example of valve-cylinder combination with
gradual pressure build-up of the overall supply
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