1
Installation and Maintenance Manual, Compact CBP
Environmentally acceptable fluids
Explanation of
"GRADE OF FILTRATION"
Grade of filtration
β
10=75 indicates the
following:
β
10 means the size of particle
≥
10
µ
m that will
be removed by filtration.
=75 means the grade of filtration of above
mentioned size of particle. The grade of
filtration is defined as number of particles in
the oil before filtration in relation to number of
particles in the oil after filtration.
Ex. Grade of filtration is
β
10=75.
Before the filtration the oil contains
N
number
of particles
≥
10
µ
m and after passing the filter
once the oil contains
number of particles
≥
10
µ
m.
This means that
number of
particles have been filtered (=98,6%).
* Vegetable fluids give good lubrication and small change of viscosity with different temperature. Vegetable fluids
must be controlled every months and temperature shall be less than +45° (11°F) C to give good service life for
the fluid.
** Environmental acceptabel fluid gives the same servicelife for the drive, as mineral oil.
Technical data
Filtration
The oil in a hydraulic system must always be
filtered and also the oil from your supplier has
to be filtered when adding it to the system.
The grade of filtration in a hydraulic system is
a question of service life v.s. money spent on
filtration.
In order to obtain stated service life it is
important to follow our recommendations
concerning contamination level.
When choosing the filter it is important to
consider the amount of dirt particles that the
filter can absorb and still operate satisfactory.
For that reason we recommend a filter with an
indicator that gives a signal when it is time to
change the filter cartridge.
Filtering recommendations
Before start-up, check that the system is
thoroughly cleaned.
1. In general the contamination level in our
motors should not exceed ISO 4406 19/15.
(NAS 10)
. For heavy-duty industrial applications the
contamination level should not exceed ISO
4406 16/1. (NAS 7)
. When filling the tank and motor housing, we
recommend the use of a filter with the grade
of filtration
β
10=75.
Fluid
Approved
Seals
Internal paint
Vegetable */** Fluid
HTG
Yes
Nitrile (std motor)
-
Synthetic ** Esters HE
Yes
Nitrile (std motor)
-
