1. Summary of components
1-31
Festo P.BE-MPA-EN en 1108e
Advantages compared to the A or B pressure regulating
valve:
– Faster cycle times
– 50 % higher exhaust flow rate, as air is not vented via the
pressure regulator. The load on the pressure regulator is
also reduced.
– No quick exhaust valves are required. The exhaust is
ducted completely via the valve terminal.
– Operating pressure is always present at the pressure
regulating valve, as the pressure is regulated upstream of
the valve, i.e. the regulator can always be adjusted.
With A or B pressure regulating valves, the valve must
switch.
Disadvantages compared to the A or B pressure regulating
valve:
– Cannot be combined with 2x2/2-w ay valves w ith
Ident. code D, I and 2x3/2-way valves w ith Ident. code N,
K, H (non- reversible valves). These valves require working
press ure in cha nn el (1) for the pneuma ti c sprin g
(se e circuit symbo l in Appendi x B, Tab. B/4 and Tab. B/3).
Application examples:
– When the air pressure in channel (2) or (4) should not be
the same as the operating pressure of the valve terminal.
– When fast venting is required.
– When the pressure regulator must always be adjustable.
Fig. 1/13 shows the following switching position of the
reversible B pressure regulating valve:
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