Valve Terminal Mpa−L With Pressure Zone Separation - Festo MPA-L Series Description

3. Installation
External pilot air supply
3.3.2 Valve terminal MPA−L with pressure zone separation
3−8
If the operating pressure lies below 3 bar or abo ve 8 bar,
pilot control of the solenoid coils must be operated with
an external pilot air supply.
Note
Use preferably closed−loop regulated external pilot air.
·
Reliable faultless operation of the valve terminal is then
possible, e. g. even with fluctuating operating pressure.
The external pilot air supply is supplied centrally for all
·
solenoid coils via pilot connections (12/14) on the right−
hand end plate. This also applies when the valve ter
minal is operated with two pressure zones.
For external pilot air supply the pilot air pressure must
·
be adapted to the operating pressure, but only within
the values of 3 ... 8 bar .
The conversion between the internal and external pilot air
supply is described in Chapter
The pressure zones are separated from each other by special
sub−bases (see Chapter 1.5.5). Each pressure zone must be
supplied by pneumatic supply plate and via a right−hand end
plate with side connections with compressed air. The position
of the supply plate within the pressure zone (left, centre or
right) is arbitrary.
By fitting a second supply plate within a pressure zone you
can provide additional supply air and exhaust air to optimise
the ventilation and exhaust performance of the valve ter
minal.
For each additional pressure zone a special sub−base is re
quired for separation and a special pneumatic supply plate is
required for supply (see Fig. 3/1 and Fig. 3/2).
5.3.6.
Festo P.BE−MPAL−EN en 1008NH