Specifications

2015/03 – Subject to change
19
è Internet: www.festo.com/catalog/...
Valve terminals MPA-L
Key features – Pneumatic components
Vertical pressure supply plate
Circuit symbol Code Description
Pressure regulator 1-32: PV  Enables separate supply of the
pressure in duct 1 and upstream
of the valve
 Operating pressure –0.9 … +10 bar
 Available in width of 20 mm
Compressed air supply and venting
Supply module
Right-hand end plate
The valve terminal MPA-L can be
supplied with compressed air at one
or more points via supply modules
and/or the right-hand end plate. The
generously sized pneumatic system
enables good performance from all
functional components, even with
large-scale expansions.
Venting (ducts 3 and 5) either takes
place via silencers or ports for ducted
exhaust air via the supply modules or
the right-hand end plate.
There are two types of supply module
with venting:
 Exhaust air 3/5 via flat plate
silencer
 Exhaust air 3/5 ducted
Venting (ducts 3 and 5) can
alternatively or additionally take
place via the right-hand end plate.
Ducts 3 and 5 are separate in the
terminal and are only joined together
in the supply module. The exhaust air
from the pilot air (duct 82/84) is
entirely separate from ducts 3 and 5.
Pilot air supply
The valve terminal MPA-L is supplied
with pilot air exclusively via the
right-hand end plate. The pilot air
supply can be selected at the pilot air
selector on the end plate:
 Internal (from duct 1) or  External (from duct 12/14)
Switching position for internal, marked "Int"
Internal pilot air supply can be
selected if the supply pressure for the
terminal is between 3 and 8 bar.
In this case, the pilot air supply is
branched by means of an internal
connection from duct 1 in the
right-hand end plate.
Port 12/14 on the right-hand end
plate can be sealed using a blanking
plug.
Switching position for external, marked "Ext"
If the supply pressure (at the
right-hand end plate) is less than
3 bar or greater than 8 bar, then the
valve terminal MPA-L must be
operated with an external pilot air
supply. The pilot air supply is then fed
via port 12/14 on the right-hand end
plate. When using several pressure
zones, the supply pressure in the
pressure zone with the right-hand end
plate is decisive.
-H- Note
If a gradual pressure build-up in the
system using a soft-start valve is
chosen, an external pilot air supply
should be connected so that the
control pressure applied during
switch-on is already very high.