Festo VTSA Series Description page 49

1. Overview of components
Festo P.BE−VTSA−44−EN en 0905e
Advantages compared with the AB pressure regulating valve:
Faster cycle times
50% higher exhaust flow rate, as air is not exhausted via
the pressure regulating valve. The load on the pressure
regulating valve 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. On
the AB pressure regulating valve the valve must switch for
this.
Disadvantages compared with the AB pressure regulating
valve:
It is not possible to use 2x2/2−way valves (identifier
T22C−A / T22CV−A) and 2x3/2−way valves (identifier
T32C−A, T32H−A, T32U−A) in combination with ducted sole
noid exhaust (82/84), as reversible pressure is present at
the valve interface.
No practical combination with an intermediate throttle
plate possible.
Application examples:
When, instead of the operating pressure of the valve ter
minal, two further different pressures are required in
ducts (2) and (4).
When fast venting is required.
When the pressure regulator must always be adjustable.
For instructions on how to install this pressure regulating
valve, see Chapter 3.3.6.
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