3. Installation
3-7
Festo P.BE-MPA-EN en 1108e
Note
Handle all modules and components of the MPA-S valve
terminal with great care.
Pay particular attention to the following:
– Exact placement of screws in the plastic thread
(to avoid damage to thread)
– Screw screws in manually
– The specified torques must be observed
– Contact surfaces must be clean (avoid leakage and
contact errors) and intact seals and sealing surfaces
– Seal unused connections with blanking plugs to avoid
contamination and maintain ability to function.
For the optimum performance of the valve terminal we
recommend that the valves be supplied via more than one
supply and exhaust line when:
– more than 6 valves of size MP A1 or
– more than 3 valves of size MP A2
are switched simultaneously to flow.
When exhausting large-volume actuators or if the exhaust
performance is too small, back pressures can build up in the
valve terminal exhaust ducts. The back pressures can lead to
pneumatic actuation of other valves, especially with
unswitched 3/2-way valves that are normally closed.
To avoid back pressures:
– Optimise pressurization and exhaust performance of the
valve terminal, such as by using larger hose diameters or
additional compressed air supply via pneumatic supply
plates with exhaust over silencers or exhaust port co vers.
– Possibly separate exhaust ducts through use of pressure
zones (see Chapter 1.4.6).
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