Comprag D-4510 [10/92] Functional description see fig 2
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Comprag D-4510 [10/92] Functional description see fig 2

Comprag D-4510 [10/92] Functional description see fig 2
10
Version 1.4
Main components
1 Electric motor 11 Min. Pressure valve
2 Flexible coupling 12 Non-return valve
3 Air end 13 Heat-exchanger, Air section
4 Air lter 14 Heat-exchanger, Oil section
5 Intake valve 15 Thermostatic valve
6 Air-Oil separation tank 16 Oil lter
7 Safety valve 17 Drain valve
8 Air-Oil separator 18 Oil lling plug
9 Throttle valve 19 Oil level sight glass
10 Non-return valve 20 Air outlet valve
2.4 Functional description (see Fig. 2.3)
Air ow: Air drawn through Air
lter
(4) and open Intake valve (5) into compressor Air-end (3) is
compressed. Compressed air and oil ow into Air-Oil separation tank (6). The air is discharged
via Min. Pressure valve (11) through Heat-exchanger (13) towards the Air Outlet Valve (20).
Oil ow: Air pressure forces oil from the air-oil separation tank (6) through the heat-exchang-
er (14) and the oil lter (16) to the compressor air-end (3) and the lubrication points. In the
air-oil separation tank (6), most of the oil is removed centrifugally; the rest is removed by
the air-oil separator (8). The oil system is tted with a thermostatic valve (15). When the oil
temperature is below the set-point of the thermostatic valve, the thermostatic valve shuts
off the oil
su
pply
from
oil heat-exchanger (14). The thermostatic valve starts opening the
supply from heat- exchanger (14) when the oil temperature exceeds the valve’s setting. The
setting of the thermostatic valve depends on the model. See table Technical Data.
Cooling system: The cooling system is a combined radiator consisting of a part for air (13) and a
part for oil (14). The ventilation takes place with a fan with separate electric motor.
2.5
Regulating system
The system is controlled by an electronic controller i-Log (2) which keeps the net pressure
within programmable pressure limits by automatically loading and unloading the compressor
in relation to air consumption.
Unloading: If air consumption is less than the air delivered by the compressor, the net pressure
increases. When the net pressure reaches the upper limit of working pressure (unloading
pressure), the solenoid valve (3) is de-energized. The damper (5) of the intake valve (1) closes
the air inlet opening by a spring force:
1. The control pressure present in the chambers of the intake valve (1) and the unloading
valve (7) is vented into the atmosphere via the solenoid valve (3).
2. The damper (5) of the intake valve (1) closes the air inlet opening.

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