HYDAC FILTER SYSTEMS MRF 3, Инструкция по эксплуатации и техническому обслуживанию, Страница: 20 / 32

MRF 3 Commissioning
HYDAC FILTER SYSTEMS GMBH en Page 20 / 32
BeWa MRF3 3218003c en-us 2012-02-22.doc 2012-02-22
Commissioning
The MRF is supplied ex works without any filter elements. Prior to commissioning,
insert the filter elements into the filter housing, as described on page 22.
Set up
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 Piping / Hosing
Make sure that no vibrations or stress/loading from other machinery and equipment
are carried over to the filter housing. If necessary, use expansion joints.
The pressure differential in a hydraulic line depends upon:

flow rate

kinematic viscosity

pipe dimensions

density of fluid
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.
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 .
Take note that the nominal size of the connected hoses/piping must be at least as
large as the inlet port sizes.