3. Installation
3-3
Festo P.BE-MPA-EN en 1108e
3.1 Compressed air preparation
Caution
Unfiltered or incorrectly lubricated compressed air will
reduce the service life of the valve terminal.
3.1.1 Operation with unlubricated compressed air
Caution
Too much residual oil content in the compressed air will
reduce the service life of the valve terminal.
– If bio-oils are used (oils with synthetic ester or true ester
basis, e.g. rape oil methylester) the residual oil content
must not exceed 0.1 mg/m
3
(see ISO 8573-1 class 2).
– If mineral oils are used (e.g. HLP oils as per
DIN 51524 parts 1 to 3) or corresponding oils on a
polyalphaolefine basis (PAO), the residual oil content
must not exceed 5 mg/m
3
(see ISO 8573-1 class 4).
This avoids operative malfunction of the valves.
Excessive residual oil is not permissible irrespective of the
compressor oil, as otherwise the basic lubrication will be
washed out with time.
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