Festo VTSA Series Description page 45

1. Overview of components
AB pressure regulating
valve (identifiers R4−...−6
and R4−...−10)
Festo P.BE−VTSA−44−EN en 0905e
Application example:
An equal output pressure is required at ports (2) and (4).
A lower air pressure (e.g. 3 bar) is required than the oper
ating pressure present at the valve terminal (e.g. 8 bar).
Mode of operation:
Supply process:
The AB pressure regulating valve regulates the air 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) and from duct (4) to
duct (5) via the pressure regulator.
Fig. 1/11 shows the following switching position of the B
pressure regulating valve: The air is passed from duct (1)
through the intermediate plate and the valve to the B pres
sure regulating valve, where it is regulated and then passed
to port (2) of the manifold sub−base. The exhaust is passed
via duct (4) to pressure regulating valve A and then via the
valve to duct (5).
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