Tuttnauer 5596 SP-1, Руководство по эксплуатации и обслуживанию

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Page 6 of 101 pages
2.2 The Pneumatic Control System
The control of the pneumatic valves is performed through compressed air, as
described below:
The pneumatic valves are air-air control type, fitted with two commands, an
opening command received through solenoid valve at a pressure of 6 bars - output
by the control system and a permanent closing command at a pressure of 3 bars,
connected to all valves.
The pneumatic control system is built as follows (refer to drawing on the next
page).
The incoming compressed air supply at a pressure of 6-8 bars is set by means of
a pressure regulator at 6 Bars and transmitted to the entrance of the pilot solenoid
valve battery.
The solenoid valve battery is mounted on a manifold branch base, through which
all the solenoids are connected to the compressed air supply.
As long as a pneumatic valve does not receive from the control system an opening
command the close command which is permanently present will determine the
shut-off position of the valve.
When an open command at 6 bars reaches a pneumatic valve, it overcomes the
opposite close command at 3 bars, and sets up the valve in position open.
A non-return valve mounted between the outlet side of the manifold branch and
the pressure reducer prevents the flow of air to the solenoid battery.
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