needle punched felt for cleaning
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needle punched felt
Smoothness of the filter material has grate effect to its moving. Initial resistance of filter material is up to its ventilation. While resistance in moving is much more than initial one. Moving resistance rests with the smoothness of filter materials surface and also the cleaning ability. If you want to get the good result, you need more ventilation, thats to say, the less resistance, the better. So that you can save much energy. Under the same condition (same back-flushing cleaner, same press, or same ventilation) , good ventilation filter bag can do better than the common one.