HYDAC FILTER SYSTEMS GMBH
Setting up / assembly / integration of the filter unit | 5
BeWa MFU-10P 4391553c en-us web
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5.5 Connecting the suction/pressure port
Install the filter unit securely in a system/an assembly, take the
pressure loss into account with the piping or hose system. You
will find the respective formula to calculate the pressure loss.
The pressure loss in a hydraulic line depends on:
– Flow
– Kinematic viscosity
– Pipe dimensions
– Fluid density
The pressure loss can be estimated as follows for mineral oil-
based hydraulic oils:
Fig. 19:
Pressure loss formula
Δp Pressure differential
[bar]
L Line length
[m]
d Internal pipe diameter
[mm]
Q Flow
[l/min]
ν Kinematic viscosity
[mm²/s]
D Density
[kg/dm³]
The mineral oil-based hydraulic oil has a density of ≈ 0.9 kg/
dm³.
This formula applies to straight pipe runs. Particularly with
regard to the suction side connection, note that additional
connectors and pipe bends increase the pressure differential.
For the hydraulic connection, note the following points:
– Keep the height difference of the product to the Fluid level
in the reservoir as small as possible.
– Use a suction hose that is suitable for a vacuum of ≥
-0.5 bar (e.g. -1 bar).
– Avoid constrictions in the connected hoses. This reduces
the power and increases the risk of cavitation.
– Note that the nominal size of the connected hose/piping
must correspond to the cross-section of the connection
thread.
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Summary of Contents for MFU-10P9S Series
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