COMPRAG FRD-0508 500л, 11410110 - Инструкция по эксплуатации - Страница 13

13

COMPRAG Screw air compressor F-Series 

Main components 

1

Electric motor

12

Non-return valve

2

Belt drive

13

Heat-exchanger, Air section

3

Air end

14

Heat-exchanger, Oil section

4

Air filter

16

Oil filter

5

Intake valve

17

Drain valve

6

Air-Oil separation tank

18

Oil filling plug

7

Safety valve

19

Oil level sight glass

8

Air-Oil separator

20

Air outlet valve

9

Throttle valve

21

Refrigerated dryer (ARD only)

10

Non-return valve

22

Pressure vessel

11

Min. Pressure valve

2.4 Functional description (see Fig. 2.1 and Fig. 2.2)

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 comprises a combined air section (13) and an oil sec-

tion (14) heatexchanger. A cooling fan, mounted in the fresh air intake section, generates 

the cooling air in order to cool the heat-exchanger.