Operating States Of The Pneumatic System - Festo VTSA Series Description

4. Commissioning

4.5.2 Operating states of the pneumatic system

Desired pneumatic
operating status
Zero−leakage
Fast reaction
Trouble−free
Two or more pres
sure zones
Vacuum or low−pres
sure operation
EMERGENCY STOP of
pressure zones
Slow start−up after
EMERGENCY STOP
Tab. 4/8: Pneumatic operating states
4−16
The following conditions should be fulfilled, in order that the
desired pneumatic operating states listed below can be
achieved:
Condition
Tubing connected with care
Sufficient pressure supply via pneu
matic supply plates or vertical pres
sure supply plates
Non−return valves in common ex
haust line
Limiting the pressure zones by
means of seal plates with duct sepa
ration
External pilot air (see Appendix A,
Tab. A/6 for the pressure range)
Guarantees the functioning of the
pressure regulating valve for the pi
lot air despite the overall supply
being switched off
If control signals are present, the pi
lot air must be applied immediately
after being switched on with at least
the minimum pressure specified in
Appendix A, Tab. A/6.
Remarks
Exhaust the VTSA... valve terminal
·
via all the exhaust plates or ex
haust port covers
This applies when several systems
with centrally ducted exhaust are
used
Subsequent conversion possible
(see Chapter 5)
Note the requirements for operating
the valve terminal with vacuum or
low−pressure in the section 3.3.8
Vacuum/low−pressure operation.
The regulator regulates the pilot air
of all the valves on a valve terminal
Festo P.BE−VTSA−44−EN en 0905e