Abstract: A filter for hydraulic fluids including a container defining inside a housing compartment fluidically communicating with an inlet and an outlet associated with and a filtering cartridge, and partitioning the compartment in first and second chambers. The cartridge is configured and positioned for determining the filtering of the hydraulic fluid from the inlet which flows from the first to the second chambers. The container exhibits an engagement portion projecting inside the housing compartment and defining a collar having an outer coupling lateral surface, while the filtering cartridge exhibits a respective engagement portion defining a respective collar exhibiting an inner coupling lateral surface configured for engaging outside the outer coupling surface of the container.

Abstract: A device for filtering oil circulating in a hydraulic circuit for operating hydraulic actuators has at least one inlet port for the oil entering the device, at least one outlet port for oil flowing out of the device, a main filter to filter the oil flowing from the inlet port to the outlet port, at least one auxiliary or discharge port and one or more by-pass ports to place the device in fluid communication with an oil accumulator. A main valve assembly is arranged between the main filter and the auxiliary or discharge port. The device extends along an axis and has by-pass valves arranged between the inlet port and the by-pass ports. The by-pass valves are radially arranged about the main valve assembly.