當濾芯被污染物堵塞或系統液溫過低，流量脈動等因素造成進油壓力為0.35Mpa時，發訊裝置便發出訊號指示。應及時更換濾芯或提高油液溫度。如此時不能馬上停機處理這些故障時，設在濾芯下部的旁通閥自動開啟工作（旁通閥開啟壓力為0.4Mpa），以保護過濾器及液壓系統正常工作。
具有過濾精度高，通油能力大，原始壓力損失小，納污量大等優點。其過濾精度以過濾精度標定，過濾比β3，β5，β10，β20≥200，過濾效率η≥99.5%，評定方法為ISO16889-99及GB/T18853-2002。
7.MF吸油過濾器
8.自封式吸油過濾器
9.XU-A系列線隙式過濾器
延伸閱讀：
SRFA系列過濾器的規格
SRFA-25×1L-Y/C SRFA-25×10L-Y/C
SRFA-40×1L-Y/C SRFA-40×10L-Y/C
SRFA-63×1L-Y/C SRFA-63×10L-Y/C
SRFA-100×1L-Y/C SRFA-100×10L-Y/C
SRFA-160×1L-Y/C SRFA-160×10L-Y/C
SRFA-250×1F-Y/C SRFA-250×10F-Y/C
SRFA-400×1F-Y/C SRFA-400×10F-Y/C
SRFA-630×1F-Y/C SRFA-630×10F-Y/C
SRFA-800×1F-Y/C SRFA-800×10F-Y/C
SRFA-1000×1F-Y/C SRFA-1000×10F-Y/C
SRFA-25×3L-Y/C SRFA-25×20L-Y/C
SRFA-40×3L-Y/C SRFA-40×20L-Y/C
SRFA-63×3L-Y/C SRFA-63×20L-Y/C
SRFA-100×3L-Y/C SRFA-100×20L-Y/C
SRFA-160×3L-Y/C SRFA-160×20L-Y/C
SRFA-250×3F-Y/C SRFA-250×20F-Y/C
SRFA-400×3F-Y/C SRFA-400×20F-Y/C
SRFA-630×3F-Y/C SRFA-630×20F-Y/C
SRFA-800×3F-Y/C SRFA-800×20F-Y/C
SRFA-1000×3F-Y/C SRFA-1000×20F-Y/C
SRFA-25×5L-Y/C SRFA-25×30L-Y/C
SRFA-40×5L-Y/C SRFA-40×30L-Y/C
SRFA-63×5L-Y/C SRFA-63×30L-Y/C
SRFA-100×5L-Y/C SRFA-100×30L-Y/C
SRFA-160×5L-Y/C SRFA-160×30L-Y/C
SRFA-250×5F-Y/C SRFA-250×30F-Y/C
SRFA-400×5F-Y/C SRFA-400×30F-Y/C
SRFA-630×5F-Y/C SRFA-630×30F-Y/C
SRFA-800×5F-Y/C SRFA-800×30F-Y/C
SRFA-1000×5F-Y/C SRFA-1000×30F-Y/C
