MultiRheo Filter - MRFD3
Starting up the MRF
HYDAC FILTER SYSTEMS GMBH
en(us)
Page 22 / 40
BeWa MRFD3 3217120b en-us 2012-03-07.doc
2012-03-07
Starting up the MRF
The MRF is supplied ex works without any filter elements. Prior to commissioning,
insert the filter elements into the filter housing as shown on page 25.
Setting up the MRF
Set up the unit horizontally on a level surface.
Make sure that there is sufficient space above the filter housing to remove the filter
elements.
Notes on pipes and hoses
Make sure that no vibrations or stress/loading from other machinery and equipment
are carried over to filter housing. If necessary, use expansion joints.
The pressure loss in a hydraulic line depends upon:
Flow
Rate
Kinematic
viscosity
Pipe
dimensions
fluid
density
The pressure loss can be estimated for hydraulic oils as follows:
Δ
p ~ 6.8 * L / d
4
* Q * V * D
Δ
p = Pressure differential in [bar]
L
= Line length [m]
d
= Internal line diameter [mm]
Q
= Flow rate [l/min]
V
= Kinematic viscosity [mm²/s]
D
= Density [kg/dm³]
Mineral oil based hydraulic fluid has a density of
~ 0.9 kg/dm³.
This applies to straight pipelines and hydraulic oils. Additional threaded connections
and pipe bends increase the pressure differential. Additional threaded connections
and pipe bends increase the pressure differential.
Keep the height difference between the pump and the oil level in the tank as low as
possible.
Hoses must be suitable for suction pressures of at least -0.5 bar.
Constrictions in the connections and lines should be avoided. This could
compromise suction output and cause cavitation .
