User manual

Industrial Air Division
32920 1163 04
1 Leading particulars
1.1.1 Air flow (Fig. 4b)
Air drawn through filter (AF) and open inlet valve (IV) into
compressor element (E) is compressed. Compressed air and oil
flow into air receiver/oil separator (AR) via check valve (CV). The
air is discharged through outlet valve (AV) via minimum pressure
valve (Vp), air cooler (Ca) and moisture trap (MT).
Check valve (CV) prevents blow-back of compressed air when the
compressor is stopped. Minimum pressure valve (Vp) prevents the
receiver pressure from dropping below a minimum pressure.
1.1.2 Oil system (Fig. 4b)
In air receiver/oil separator (AR), most of the oil is removed from
the air/oil mixture centrifugally. The balance is removed by oil
separator element (OS). The oil collects in the lower part of air
receiver/oil separator (AR), which serves as oil tank.
1.1 General description
GA are stationary, single-stage, oil-injected screw compressors
driven by an electric motor. GA30, -37 and -45 are air-cooled,
whereas GA30 W, -37 W and -45 W are water-cooled.
GA Pack
The compressors are enclosed in a sound-insulated bodywork.
The front panel comprises an electronic control module including
the start and stop buttons. An emergency stop button is also
provided. An electric cabinet comprising the motor starters is
located behind this panel.
GA Full-feature
GA Full-feature compressors are additionally provided with an air
dryer integrated in the bodywork. The dryer removes moisture from
the compressed air by cooling the air to near freezing point and
automatically draining the condensate.
E1. Electronic control module
1. Air outlet pipe
2. Electric cable inlet
3. Condensate drains
4. Side door
Fig. 1. General view of GA45