Product Manual

The filter elements of dus filters (QCF) should be replaced after 4000 hours or when the pressure drop
reaches 350 mbar (whatever comes first).
The pressure drop is reached when the indicator or gauge turns red.
Summarizing the following service intervals should be observed (whatever comes first):
• 4000 operating hours
• 12 months in use
• pressure drop: 350 mbar
QAF filters
For QAF filters, the change interval of the adsorption element is approximately 1000 operating hours or
yearly. Its pressure drop will not increase during its useful life. Nevertheless, the adsorption element must
be changed earlier at the first signs of oil vapor and odor.
4.4 Filter disposal
Used filters must be disposed of in an environmentally friendly and safe manner, and in line with the local
recommendations and environmental legislation.
Instruction book
18 2920 7150 20