Return filters are used as process and safety filters to protect pumps and hydraulic circuits from contamination as per ISO 4406.

They are available in 4 styles :

* SMP semi-immersed filters for mounting to the oil tank with external/internal filter element
* MPT semi-immersed filters for mounting to the oil tank with external/internal filter element
* MHP/MPI semi-immersed filters for mounting to the oil tank with external/internal filter element
* FRI semi-immersed filters for mounting to the oil tank or in-line, available in the single or duplex versions, with external/internal filter element