Product Manual

Protective and warning devices
of dust can quickly form on the air cooler fins, impairing the cooling effect. This can result in high com-
pressed air final temperatures and, ultimately, to the system overheating. This is why the cooler fins need
to be cleaned regularly. Make sure that the surface of the cooler remains clean.
2. Oil filter
The Oil filter is a paper filter that can filter contaminants out of the Oil, such as metal particles. A mesh
size of 10 µm ensures bearings and rotors are protected reliably. If the Oil filter is not replaced as specified
in the maintenance table, there is a danger of an insufficient flow rate of Oil, high compressed air final
temperatures and a shutdown of the system. The service life of the bearings may also be impaired by an
insufficient Oil volume.
3. Oil separator
The filter element of the oil separator is comprised of multiple layers of fine fibreglass, allowing the pro-
portion of Oil mist in the compressed air to be reduced significantly after passing the oil separator. The
quality of the Oil and the degree of contamination of the ambient air have a large impact on its service
life. Only the Oil for screw compressors that we recommend may be used as a Oil.
The Oil filtered by the oil separator is collected in the small, round cavity in the middle, and is conveyed
back to the compressor stage through a Oil return line.
4. Oil temperature regulator
There is a thermoregulation valve in front of the Oil cooler. The Oil temperature is low shortly after starting
up the system. The thermoregulation valve then automatically opens the return circuit, allowing Oil to flow
into the system without passing the Oil cooler. If the Oil temperature increases to more than 67 °C, this
valve opens slowly until it is fully open at 72 °C. The entire Oil then passes the Oil cooler first before
flowing into the system.