Comprag F9010 [11/96] Functional description see fig 2

COMPRAG Screw air compressor F-Series

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-exchanger (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 supply from oil heat-ex-

changer (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 section (14) heat- exchanger.

A cooling fan, equipped with a separate electric motor, generates the cooling air in order to cool

the heat-exchanger.

2.5

Control system

Fig. 2.5 Control system