1. Summary of components
1-30
Festo P .BE-MPA-EN en 1108e
Reversible B or A pressure regulating valve
(identifier PN, PL, PM, PK)
Supply process: The reversible pressure regulator splits up the supply air in
channel (1) and regulates the pressure in front of the valve
in the relevant channel (see 1 in Tab. 1/11), in the other
channel (see 2 in Tab. 1/11) the unregulated pressure from
channel 1 is present. The regulated air is then switched to
the relevant work channel. The valve is thus operated in
reversible mode.
Exhaust process: In the valve, ventilation takes place from the corresponding
work channel (see 3 in T ab . 1/11) on duct (1) and guided in
the pressure regulator plate onto the corresponding exhaust
channel of the sub-base.
Reversible
pressure regulator
Pressurizing process Exhaust process
Pressure of the
supply air
regulated in front
of the valve 1
Unregulated
pressure of the
supply air 2
Exhaust vented via
the pressure
regulator plate 3
Rev. A-pressure
regulator
in channel (5) in channel (3) from channel (4) via
channel (1) to
channel (5)
Rev. B-pressure
regulator
in channel (3) in channel (5) from channel (2) via
channel (1) to
channel (3)
Tab. 1/11: Mode of operation of the reversible A or B pressure regulating valve
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