Festo VTSA Series, Manual

Page: 36 / 166

1. Summary of components
1−20
Festo P.BE−VTSA−44−EN en 0601a
1 2 3
Connection 2 (B)
Connection 4 (A)
1
Channel 5 (exhaust)
2
Channel 1 (supply air)
3
Channel 3 (exhaust)
Fig.1/8: Reversible AB pressure regulator
Advantages compared with the AB pressure regulator:
Faster cycle times
50 % higher exhaust flow, as exhausting is not carried out
via the pressure regulator. Also the pressure regulator is
loaded less.
A fast exhaust valve is not required. The exhaust is
ducted completely via the valve terminal.
The operating pressure is always present on the pressure
regulator because regulating takes place in front of the
valve, i.e. the regulator can always be set. On the AB pres
sure regulator the valve must switch for this.