Gardner Denver L30RS, Руководство пользователя и обслуживания

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5 Design and functioning
23
5.5.1 Manner of operation of the suction regulator
Load running mode
When switching over to delta connection the two
solenoid valves (7 (Y1) and 9 (Y4)) are supplied with
power. The relief spool (11) is closed. At the same time
compressed air flows through the pipe (20) into the upper control chamber of the actuator. The suction
regulator valve opens, the lower control chamber is bled
through the pipe (22) by the solenoid valve (7 (Y1).
Fig. 4
Idling mode
As soon as mains pressure has been attained, both
solenoid valves (7 (Y1) and 9 (Y4)) are de-energized.
The actuator is closed via the pipes (21) and (22). At
the same time the relief spool (11) opens and relieves the oil separator reservoir via the pipes (16) and (23).
A small amount of air is sucked in through the bypass
valve (15).
Fig. 5
Oil separator
reservoir
Oil separator
reservoir