Functional Description; Regulating System - Comprag DV Serie Bedienungsanleitung

Main components
1 Electric motor
2 Flexible coupling
3 Air end
4 Air filter
5 Intake valve
6 Air-Oil separation tank
7 Safety valve
8 Air-Oil separator
9 Throttle valve
10 Non-return valve
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-exchang-
er (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 thermostatic 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 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 v-Log (4) 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 pres-
sure. Increases and reaches the upper limit of working pressure (unloading pressure). The
controller (2) stops energize the solenoid valve (3), the valve opens, the air pressure from
the separator tank (4) closes the damper (5) of the suction valve (1), and the compressor's
pneumatic system is unloaded through the throttle.
Loading: When the net pressure decreases to the loading pressure, the controller (2) energizes
the solenoid valve (3). Air pressure from the separator tank (4) is interrupted and the damper
(5) opens. Air suction resumes and the compressor runs loaded.
10
11 Min. Pressure valve
12 Non-return valve
13 Heat-exchanger, Air section
14 Heat-exchanger, Oil section
15 Thermostatic valve
16 Oil filter
17 Drain valve
18 Oil filling plug
19 Oil level sight glass
20 Air outlet valve
Version 1.0