Suction filters are used as safety filters to protect pumps from gross contamination that can cause them to grip. They are available in 3 styles :
SF2 semi-immersed filters, which shut off oil flow while the filter element is being replaced, replace the butterfly valves usually used for servicing hydraulic pumps.
Also show are Hydraulic comby Filter for filtration return linee and suction on the hydrostatic transmissions for mobile machine.