1. Summary of components
1-28
Festo P .BE-MPA-EN en 1108e
B or A pressure regulating valve(Ident. code PH, PC, PG, PB)
Pressurizing process The A or B pressure regulating valve regulates the
corresponding pressure in ducts (2) (B) and (4) (A) when the
pressure medium has passed through the valve.
Exhaust process: During the exhaust process, the exhaust flow in the valve is
unregulated from duct (2) to duct (3) for the B pressure
regulating valve and from duct (4) to duct (5) via the A
pressure regulating valve.
Restrictions:
– The exhaust flow in the regulating direction is limited by
the pressure regulating valve.
– The pressure of the operating pressure in channel (2) can
only be set and read at the pressure gauge when the
valve is activated (flow from 1 } 2).
Application examples:
– if a supply air pressure that is different from the
operating pressure of the valve terminals is required at
ports (2) or (4).
– if it is not possible to use the reversible pressure
regulator, e.g. when 2x3/2-way valves with ducted
solenoid exhaust (82/84) are used.
Fig. 1/12 shows the following switching position of the
B pressure regulating valve:
The air is passed from channel (1) through the pressure
regulator plate and the valve to pressure regulating valve B,
where it is regulated and then passed to the port (2) of the
sub-base. The unregulated exhaust air is then fed via
channel (4) through the pressure regulator plate and then to
channel (5) and vented.
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