External pressure type is generally external raw water, high pressure; internal clean water. From the external liquid flow, all the pollutant particles are intercepted outside the filter element, and can be discharged through the discharge valve of the filter. Internal pressure refers to internal raw water and external water purification under high pressure. From the inside to the outside of the liquid flow direction, all contaminant and impurity particles are trapped in the filter element to reduce the precipitation of contaminants in the filter.

Now many customers replace the melt-blown filter element with large flow filter element, melt-blown filter element flow is small, it is more troublesome to replace, long time, large flow filter element as the reverse osmosis system pre-filtration front, its filtration flow is large, can carry out deep filtration, and its filtration time is short, installation and replacement is more convenient.

The selection of large flow filter element is generally judged according to the filter. The interface does not match with the filter, which is easy to leak, and may make the whole system can not be used normally. Therefore, when purchasing large flow filter element, it is necessary to provide size and accuracy, but also to provide the type of port, the purchase is installed on the filter, it can be used normally.

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