SRFA series oil return filter consists of two monotube filters, directional valve, bypass valve, transmitter, diffuser, etc. The return filter is installed on top of the tank and the filter element can be replaced without downtime. It is suitable for re-filtering the oil concentrate during continuous operation of the hydraulic system, which is used to filter the metal powder generated by the wear of the components in the hydraulic system, the rubber impurities of the seals, etc., and keep the oil flowing back to the oil tank clean to facilitate the circulation of oil in the system.