（1）過(guò)濾器濾芯要裝在泵的吸油口處： 泵的吸油路上一般都安裝有表面型濾油器，目的是濾去較大的雜質(zhì)微粒以保護(hù)液壓泵，此外濾油器的過(guò)濾能力應(yīng)為泵流量的兩倍以上，壓力損失小于0.02MPa。

（2）過(guò)濾器濾芯安裝在泵的出口油路上： 此處安裝濾油器的目的是用來(lái)濾除可能侵入閥類(lèi)等元件的污染物。其過(guò)濾精度應(yīng)為10～15μm，且能承受油路上的工作壓力和沖擊壓力，壓力降應(yīng)小于0.35MPa。同時(shí)應(yīng)安裝 安全閥以防濾油器堵塞。

（3）過(guò)濾器濾芯安裝在系統(tǒng)的回油路上：這種安裝起間接過(guò)濾作用。一般與過(guò)濾器并連安裝一背壓閥，當(dāng)過(guò)濾器堵塞達(dá)到一定壓力值時(shí)，背壓閥打開(kāi)。

（4）過(guò)濾器濾芯安裝在系統(tǒng)分支油路上。

（5）過(guò)濾器濾芯單獨(dú)過(guò)濾系統(tǒng)：大型液壓系統(tǒng)可專(zhuān)設(shè)一液壓泵和濾油器組成獨(dú)立過(guò)濾回路。

通常過(guò)濾器濾芯液壓系統(tǒng)中除了整個(gè)系統(tǒng)所需的濾油器外，還常常在一些重要元件（如伺服閥、精密節(jié)流閥等）的前面單獨(dú)安裝一個(gè)專(zhuān)用的精濾油器來(lái)確保它們的正常工作。長(zhǎng)期供應(yīng)賀德克濾芯部分型號(hào)：

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