因此为了保护膜层，在过滤含有磨损性物质的料液时，必须对料液通过初过滤、离心分离 或沉降等方法进行预处理。

Therefore, filtering of abrasive matter required pre-treatment stages such as pre-filtration, centrifuging, or sedimentation in order to protect the membrane.

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ffu设有初、高效两极过滤网。

FFU have primary and hepa two pole filter net.

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轻便的板式结构，优质的聚酯合成纤维过滤材料，初阻力低，防火性好。

The light panel structure, the high quality PET synthetic fiber filter material is with features of low initial pressure, good fire-proof function.

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