Functional Description; Regulating System - Comprag DV Serie Bedienungsanleitung

2.4 Functional description (see Fig. 2.3)
Air flow: Air drawn through Air filter (4) and open Intake valve (5) into compressor Air-end (3) is
compressed. Compressed air and oil flow 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 flow: Air pressure forces oil from the air-oil separation tank (6) through the heat-exchanger (14) and the
oil filter (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 fitted with a
thermostatic valve (15). When the oil temperature is below the set-point of the thermostatic valve, the ther-
mostatic valve shuts off the oil supply 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 comprises a combined air section (13) and an oil sec-
tion (14) heat- exchanger. A cooling fan, mounted directly on the motor shaft, generates the
cooling air in order to cool the heat-exchanger.
2.5

Regulating system

Fig. 2.5 Regulating system
The system is controlled by an electronic controller
within programmable pressure limits by automatically loading and unloading the compressor in
relation to air consumption.
COMPRAG Screw air compressor DV-Series
1
2
4
3
5
6
7
v-Log (4) which keeps the net pressure
11