4. Assembly instructions Page 19
EN
If no documentation is available, you can
request the documentation directly from
SKF Lubrication Systems Germany AG.
4.5. Lubrication line connection
The lubrication line must be connected to the piston
pump in such a way that no forces can be
transferred to the assembled piston pump (stress-
free connection).
Warning!
The fittings used to connect the lubrication
line should be designed for the maximum
operating pressure of the single-piston
pump. If they are not, the lubrication line
system needs to be protected from
excessive pressure by means of a
pressure-limiting valve.
For operating pressures up to 45 bar as can occur
especially in single-line piston distributor systems,
SKF fittings for solderless lubrication line screw
unions can be used (double tapered sleeves or
tapered sleeves).
For operating pressures up to 250 bar as can occur
especially in progressive centralized lubrication
systems, SKF cutting-sleeve screw unions
conforming to DIN 2353 can be used. If using
fittings from other manufacturers, pay careful
attention to the assembly instructions and
technical data from the manufacturer.
4.6. Lubrication line arrangement
When arranging the main lubricant lines and
lubrication point lines, observe the following
instructions in order to ensure that the entire
lubrication system functions smoothly.
The main lubricant line must be dimensioned in
accordance with the maximum operating pressure
occurring in the lubrication unit used and the
delivery volume of that lubrication unit. If possible,
the main lubricant line should rise upward from the
lubrication unit and be ventable at the highest point
on the lubrication line system.
Lubricant distributors at the end of the main
lubricant line must be installed such that the outlets
of the lubricant distributors point upwards. If the
system configuration requires that the lubricant
distributors be arranged below the main lubricant
line, they should not be placed at the end of the
main lubricant line.
The pipes, hoses, shutoff valves and directional
control valves, fittings, etc. that will be used must be
designed for the maximum operating pressure of
the lubrication unit, the permissible temperatures
and the lubricants that will be delivered. The
lubrication line system also needs to be protected
from excessive pressure by means of a pressure-
limiting valve.
All components of the lubrication line system such
as pipes, hoses, shutoff valves and directional
control valves, fittings, etc. must be carefully cleaned
before assembly. No seals in the lubrication line
system should protrude inwards in a way that
disrupts the flow of the lubricant and could allow
contaminants to enter the lubrication line system.
Lubrication lines should always be arranged so that
air pockets cannot form anywhere. Avoid changes in
the cross-section of the lubrication line from small
to large cross-sections in the direction of flow of the
lubricant. When the cross-section does change, the
transition should be gentle.
The flow of lubricant in the lubrication lines should
not be impeded by the incorporation of sharp bends,
angle valves, or flap valves. Unavoidable changes in
the cross-section in lubrication lines must have
smooth transitions. Sudden changes of direction
should be avoided if possible.
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