1 = Intake filter with paper microfilter insert
2 = Multifunction suction controller
3 = Oil injection
4 = Compressor stage
5 = Oil separator tank
6 = Spin-on oil separator cartridge
7 = Minimum pressure valve
8 = Oil cooler
9 = Aftercooler parallel to flow of cool air
10 = Oil microfilter
11 = Thermostat valve
12 = Cleaning aperture | BOGE screw compressors draw in atmospheric air through the cyclonic suction filter 1 fitted with a paper microfilter cartridge and with soiled filter facility. After passing through the multi-function suction controller 2 the air enters the compressor stage and is compressed 4. Continuously cooled BOGE long life S46 oil is injected 3 into the compressor stage. The oil absorbs and removes the heat generated during the compression process which increases in temperature to approx. 85°C. According to EC machinery guidelines the final maximum compression temperature may not exceed 110°C.
A large proportion of the oil is separated from the compressed air in the combined air/oil separation vessel 5. the residual oil is removed by the spin-on fine oil separator 6, which removes the residual oil in the compressed air down to only approx. 1-3 mg/m³.
The compressed air then passes through a minimum pressure valve 7 into the compressed air aftercooler 9 where it is cooled down to a temperature of only 8°C above ambient and is then directed through the standard BOGE stop valve into the compressed air system.
The oil in the oil separator is cooled from 85°C to 55°C in the amply dimensioned oil cooler 8. It then passes through a replaceable spin-on oil filter 10. A thermostatic valve 11 in the oil circuit ensures that the oil temperature is ideal in every operating phase. |