The FL MPBY.18 filter is composed of a top body with a By-pass valve on the outlet duct and an aluminium cap, screwed together. Wall fastening with bracket. On the inside there is a star cartridge with a seal and paper filtering element, with filtration 10-30 mm.
In the top cap there is a By-pass valve on the outlet/service duct with two opposing one-way check valves to prevent oil returning into the cartridge and particles of dirt separating from the filtering surface in the phase of decompression of the main line for recharging volumetric dosing valves.