Gardner Denver ESM 30, Оригинальное руководство пользователя

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4. Design and functioning
26
4.5.3 Manner of operation of the suction regulator ESM 45-ESM 50
Load running mode
When switching over to delta connection the two
solenoid valves are supplied with power (7 (Y1) and
9 (Y4)). The relief spool (11) is closed. At the same
time compressed air flows through the pipe (20) into the upper control area of the operating cylinder. The suction
regulator valve opens, the lower control area 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 switched without
current. The operating cylinder is closed via the pipes
(21) and (22). At the same time the relief spool (11) opens and relieves the oil separator vessel via the
pipes (16) and (23). A small amount of air is sucked in
through the bypass valve (15).
Fig. 5
Oil separator
vessel
Oil separator
vessel