Spin-on filters type 50 SL 30 to 80D are designed for hydraulic systems, focusing on the separation of solids from fluids and lubricating oils. Compact and ideal for mobile hydraulics, they allow installation in suction, pressure, or return lines. They use special filter materials to capture ultrafine particles with a high dirt retention capacity. Options include a maintenance indicator and integrated bypass valve, as well as a replacement spin-on element (size 82).