1. Summary of components
1−28
Festo P.BE−MPA−EN en 0910d
Reversible B or A pressure
regulating valve
(identifier PN, PL, PM, PK)
Mode of operation of the reversible B pressure regulating
valve:
Supply process:
The reversible B pressure regulating valve splits the supply
in channel (1) and regulates the pressure upstream of the
valve in channel (3) (channel (5) receives the unregulated
pressure from channel (1)). Thereafter the regulated air is
switched to working channel (2). The valve is thus operated
in reversible mode.
Exhaust process:
Venting occurs in the valve from working channel (2) to
channel (1) and in the intermediate plate to the manifold
block exhaust duct (3).
Fig.1/12 shows the following switching position of the
reversible B pressure regulating valve:
The air in channel (1) is split:
The regulated air pressure is present in the channel (3).
The pressure is regulated before the valve.
The unregulated working pressure from channel (1) is
present at channel (5).
The regulated pressure is switched to channel (2) inside the
valve. The unregulated exhaust air is switched inside the
valve from channel (4) to channel (1) and then in the
intermediate plate to channel (3).
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