Charge Filtration - Sauer Danfoss 40 Series Technical Information

Series 40 Axial Piston Pumps
Technical Information
System design parameters
fiLtRation (continued)

Charge filtration

Charge filtration
Provision for charge pressure filtration
is available on all Series 40 pumps.The
pressure filter is remotely mounted in the
Strainer
Reservoir
circuit after the charge pump, as shown
in the accompanying illustration.
Filter
To Low Pressure
Filters used in charge pressure filtration
with bypass
side of loop
circuits must be rated to at least 34.5 bar
and servo control
[500 psi] pressure. A 100 - 125 µm screen
located in the reservoir or in the charge
Charge relief
inlet line is recommended when using
valve
charge pressure filtration.
Charge
pump
To pump case
A filter bypass valve is necessary to
prevent filter damage and to avoid
P106 102E
contaminants from being forced through
the filter media by high pressure
differentials across the filter. In the event
of high pressure drop associated with a
blocked filter or cold start-up conditions,
fluid will bypass the filter. Avoid working
with an open bypass for an extended
period. We recommend a visual or
electrical bypass indicator. Proper filter
maintenance is mandatory.
520L0635 • Rev EH • June 2009
18