Characteristics of Ultrafiltration Membranes
Our hollow fiber UF membranes offer the following features:
- 0.03 µm nominal pore diameter for removal of bacteria, viruses, and particulates including colloids;
- PVDF polymeric hollow fibers for high strength and chemical resistance;
- Hydrophilic PVDF fibers for easy cleaning and wettability that help maintain long term performance;
- Outside-In flow configuration for high tolerance to feed solids and the use of air scour cleaning;
- U-PVC housings eliminate the need for pressure vessels and are resistant to UV light
The outside-In flow configuration is tolerant of wide ranging feed water qualities and allows air scour cleaning.
The dead-end flow offers higher recovery and energy savings. The pressurized vertical shell-and-tube design
eliminates the need for separate pressure vessels and allows easy removal of air from cleaning and integrity
testing steps.
The hollow fiber membranes are 1.3 mm outside diameter and 0.7 mm inside diameter and are made from
PVDF polymer. The fibers are strong because of a combination of the PVDF polymer, asymmetric dense
spongy layer, and skins formed on each side of the fiber. The PVDF membranes offer high chemical resistance
and are tolerant to temperatures of 40ºC. The hydrophilicity of the PVDF fibers is increased by using a
proprietary treatment during manufacturing.
The 0.03μm nominal pore size combines high filtration performance and high flux. The smaller pore size
provides stabile long term filtration performance compared to microfiltation.
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