Checking the valve-cylinder combination
WARNING
When exhausting or repressurizing the valve terminal
under the following conditions:
– with safety start-up valve
(slow pressure build-up) and
– when there is an electrical signal
(e.g. after EMERGENCY STOP)
Supply the auxiliary pilot air separately (3 to 8 bar).
The auxiliary pilot air must reach its full level immedi-
ately after being switched on, otherwise the slow pres-
sure build-up of the overall supply will have no effect
with cylinders actuated as follows:
– by means of single solenoid valves
– by means of double solenoid valves which are
switched to flow-through during the pressureless
phase.
The effects of slow pressure build-up when there is an
electrical signal are shown in the table below.
Separately
supplied auxiliary
pilot air
Pressure
increase in
overall supply
Pressure
increase in
auxiliary pilot
air (12/14)
Moment when
valve switches
over
Movement of
cylinder
taken behind safety
start-up valve
slow slow after pressure
increase at (1)
fast
taken in front of
safety start-up valve
slow fast before pressure
increase at (1)
slow
4. Commissioning
4-6 CPV... 9802
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