Low Pressure Filters Eatons simplex and duplex low pressure filters are suitable for a working pressure up to 464 PSI. Medium Pressure Filters Eatons simplex and duplex low pressure filters are suitable for a working pressure range from 464 to 2, 320 PSI.High Pressure Filters Eatons simplex and duplex high pressure filters are suitable for a working pressure higher than 2, 320 PSI. Filtration Systems Eaton designs and manufactures a full line of hydraulic and lubrication systems that optimize the reliability of machinery and increase the service life of system components