Filter located in the direct circuit and through which therefore the entire and, for the most part, periodically pulsatile flow rate passes.
Filters in the main conduit include the following:
- Suction filter (a)
- Low-pressure filter (b)
- High-pressure filter (c)
- Return line filter (d)
If filtering is only required for a subflow, part of the flow rate is channelled past the filter into the tank via an orifice valve (e).
In very large systems filtering is undertaken in the secondary flow (f), as the separate circuit is selected in which a separate filter pump presses the fluid through the filter and mostly also through an oil cooler, independently of the working cycle.
See also
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