OLF 5 with Temperature sensor
HYDAC Filtertechnik GmbH
en
Page 12
BeWa OLF-5 LL-ET_3321664a en.doc
2006-10-06
3.5 Hydraulic
Schematic
4
Notes on Piping / Hoses
In order to keep the pressure differential as low as possible, use as few threaded
connections as possible.
The pressure differential in a hydraulic line depends on
•
flow rate
•
kinematic viscosity
•
pipe dimensions
and can be estimated for hydraulic oils as follows:
υ
×
×
×
≈
Δ
Q
d
L
bar
p
4
84
,
5
]
[
L
= line length [m]
d
= line internal diameter [mm]
Q
= flow rate [l/min]
ν
= kinematic viscosity [mm²/s]
This applies to straight pipe runs and hydraulic oil. Additional threaded connections and pipe
bends increase the pressure differential.
The difference in height between the pump and the oil level in the tank should be kept as
small as possible.
Hoses must be suitable at minimum for suction pressures of -0.5 bar.
Constrictions in the connections and lines should be avoided so as to prevent compromising
suction output or cavitation. The nominal size of the connected hoses/piping must be at least
as large as the inlet port sizes in order to prevent an excessively high negative suction
pressure.
The suction pressure must be in the range of -0.4 – 0.6 bar.
Summary of Contents for OLF 5/4 Series
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