Commissioning
HYDAC Filtertechnik GmbH
en
Page 44
BEWA OLF15-60 10bar 3255361-01a en.doc
2005-11-22
6 Commissioning
Whether the OLF comes with filter elements depends on how it is ordered. Prior to
commissioning, check the installation of the filter elements in the housing. For more
information, see the section on
Changing the Filter Elements
.
7 Setup
The unit must be mounted level and on a flat surface. No special mounting is required. The
standard pump is designed for ambient temperatures of 10° – 40° C (50° – 104° F).
Adequate cooling air must be provided in order to prevent the motor from overheating.
Sufficient room must be left around the housing for removing the filter elements.
8
Notes on Piping / Hosing
Use as few threaded connections as possible in order to keep the pressure differential as low
as possible.
The pressure differential in a hydraulic line depends on
•
flow rate
•
kinematic viscosity
•
pipe dimensions
•
density of fluid
and can be estimated for hydraulic oils as follows:
ρ
υ
×
×
×
×
≈
∆
Q
d
L
bar
p
4
8
,
6
]
[
d
= pipe internal diameter [mm]
Q
= flow rate[l/min]
ν
= kinematic viscosity [mm²/s]
ρ
= density [kg/dm³] mineral oil
≈
0,9kg/dm³
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 must be kept as small
as possible.
Hoses must be suitable for suction pressures of at least -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.
