Starting up the FAM
FAM 25/45/60/75/95
en(us)
Page 55/160
BEWA FAM25-95 3402054f en(us) 2013-06-13
2013-06-13
With a lower pressure (such as 250 mbar), you achieve an lower residual water
content. With a higher pressure (such as 500 mbar), you achieve a faster
dewatering, especially with free water.
By closing the vacuum gauge (D) you reduce the absolute pressure and the
required air-flow rate for dewatering the fluid.
If the vacuum gauge is completely closed, dewatering takes place exclusively with
the air released in the fluid. The dewatering speed is then reduced to a minimum.
We recommend relative saturation (relative moisture) for water contents > 100%.
With free water this means starting with higher pressure (such as 500 mbar), and
reducing the pressure (to 250 mbar, for example) only after the level has fallen
below the saturation point (<100%).
Some oils foam intensively when they enter the vacuum chamber. This effect is
particularly pronounced with high water contents. This effect is also to be observed
with older oils or extremely high-viscosity media.
If too much foam is caused, it is drawn in by the vacuum pump. Increase the
vacuum in such cases, e.g. from 250 mbar to 350 mbar.
Water condensation can also occur in the connecting hose between the vacuum
pump and the vacuum column in the presence of a very high water content in the
oil. The water is separated out into the vacuum pump storage container. Raise the
vacuum to 500 mbar in such cases.
