... , filter must be replaced.The filter with differential pressure transmitter device, when the filter pollution out ... port plug when the pressure is 0.35MPa, which issued a switch signal, then replace the ... filter, through the oil capacity, the original pressure loss, pollutant load and other advantages, the ... and GB/T18853-2002.ZU-H, QU-H series pressure pipe passing through filter cartridge Model: HX-40 ...