FluidAqua Mobil - FAM 10
FAM Set-up and Connection
HYDAC FILTER SYSTEMS GMBH
en(us)
Page 30 / 72
BEWA FAM10 3549460a en-us 2011-05-05.doc
2011-05-05
Determine the pressure loss
P
(height)
as follows:
P
(height)
[bar] = h/10.
h
stands here for the distance between the suction connection on the FAM and the
fluid surface in the tank.
The pressure loss in a hydraulic line (
P
(line)
) depends on the following:
Flow
rate
Kinematic
viscosity
Pipe
dimensions
Fluid
density
The pressure loss in straight pipes (
P
(line)
) can be calculated as follows:
Δ
p
≈
6.8 * L / d
4
* Q * V * D
Δ
p = Pressure differential in [bar]
L
= Pipe length [m]
d
= Internal pipe 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.
The density (D) is:
Mineral hydraulic oil HLP
0.85 – 0.90 kg / dm³
Phosphate ester HFDR
1.00 – 1.10 kg / dm³
Insulating oil
0.90 – 1.00 kg / dm³
Lubrication oil
0.90 – 0.95 kg / dm³
Additional threaded connections and pipe bends increase the pressure differential
and must be taken into account.
Keep the height difference between the pump and the oil level in the tank as low as
possible.
Avoid constrictions in the connected hoses. They compromise output and increase
the risk of cavitation.
Make sure that no tension or vibrations are carried over to the pump or filter housing
when the pipes are connected. Use hoses or expansion joints if necessary.
