河北鑫鑫滤芯厂生产替代国产进口材料马勒PI8315DRG40该过滤器安装在液压系统的回油管路处，用以滤除油液中诸元件磨损的金属颗粒以及密封件磨损的橡胶杂质等，使流回油箱中的油液保持清洁，有利于系统中油液循环使用。
该过滤器分化纤、纸质，网状和线隙式四种滤材。化纤滤材比纸质滤材过滤效果好，精度高，化纤滤材和纸质滤材滤芯堵塞后清洗比较困难，因此必须更换滤芯。
该过滤器装有压差发讯装置，当滤芯被污染堵塞致使进出油口压差为0.35MPa时，便发出开关信号，此时应清洗或更换滤芯。
该过滤器的滤芯采用玻璃纤维过滤材质，具有过滤精度高，通油能力大，原始压力损失少，纳污量大等优点，其过滤精度以绝对过滤精度标定，过滤β3，β5，β10，β20≥200，过滤效率η≥99.5%,评定方法为ISO16889-99及GB/T18853-2002。

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