Compressed Air Preparation; Operation With Unlubricated Compressed Air; Operation With Lubricated Compressed Air - Festo VTSA Series Description

3. Installation
3.1

Compressed air preparation

3.1.1 Operation with unlubricated compressed air

3.1.2 Operation with lubricated compressed air

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Caution
Unfiltered or incorrectly lubricated compressed air will
reduce the service life of the valve terminal.
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
If mineral oils are used (e.g. HLP oils as per DIN 51524
parts 1 to 3) or corresponding oils on the basis of polyal
phaolefine (PAO), the residual oil content must not ex
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ceed 5 mg/m (see ISO 8573−1 class 4).
This avoids operative malfunction of the valves.
Excessive residual oil content is fundamentally not permis−
sible irrespective of the compressor oil, as otherwise the
basic lubrication will be washed out with time.
Operate system equipment with unlubricated compressed air
if possible. This is better for the environment. Festo pneu
matic valves and actuators have been designed so that, if
used as intended, they will not require additional lubrication
and will still achieve a long service life.
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(see ISO 8573−1 class 2).
Festo P.BE−VTSA−44−EN en 0905e