HYDAC FILTER SYSTEMS FAM-5-M-2-A-05-R-H-B-Z-1, Инструкция по эксплуатации и техническому обслуживанию

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FAM Set-up and Connection
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BEWA FAM5 3667663b en-us 2012-12-12.doc 2012-12-12
The pressure differential 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 HFD-R 1.00 … 1.10 kg/dm³
Insulating oil 0.90 … 1.00 kg/dm³
Lubricant 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
small 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.