Hollow Fiber Ultrafiltration Technology
Fine Physical Filtration with a Hollow Fiber UF Membrane
Thousands of fine, straw-like membrane fibers create a compact physical filtration barrier. Water passes through microscopic pores, while larger suspended particles are retained on the other side of the membrane.
Standard UF Membrane Configuration Hollow fiber UF membrane technology is built into applicable Purewell portable filtration systems as a core physical filtration component—not an optional add-on.
Purewell Standard
Physical Separation Process
Source Water
Filtered Water
Larger suspended particles are retained
Water passes through microscopic membrane pores
How the Membrane Works
The membrane performs filtration through physical separation rather than adding chemicals to the water.
1
Source Water Enters Water reaches the outside of the hollow fiber membrane bundle.
2
Water Crosses the Membrane Wall Gravity, pressure, or the system pump moves water through the microscopic pores in each fiber.
3
Larger Particles Are Retained Suspended matter larger than the membrane pores is physically blocked from passing through.
4
Filtered Water Flows Out Water travels through the hollow center of the fibers and exits the filtration system for use.
Fine Physical Barrier Helps separate suspended sediment, fine particles, turbidity, and other contaminants larger than the membrane pores.
Large Filtration Area Bundles of narrow fibers provide a large membrane surface area within a compact filter structure.
Practical Water Flow Multiple hollow fibers work together to balance fine filtration with practical flow for portable use.
No Chemical Additives The membrane filters through physical separation and does not add treatment chemicals to the source water.
✓ Designed to Help Reduce
- Suspended sediment and fine particles
- Turbidity and visible particulate matter
- Microplastics larger than the membrane pores
- Certain microorganisms, depending on membrane specifications
i Understand the Filtration Limit
- Does not desalinate water or remove dissolved salts
- Does not soften hard water by itself
- May not reduce all dissolved chemicals or metal ions alone
- Additional filter media may be used for broader filtration
Important Use and Care Notes
Proper use and maintenance help protect membrane performance and maintain water flow.
01
Choose the Clearest Available Water Avoid heavily polluted water whenever possible. Allow sediment to settle or use a pre-filter when the source water is highly turbid.
02
Do Not Use with Saltwater or Chemicals The membrane is not designed for seawater, industrial wastewater, oil-contaminated water, or chemically polluted sources.
03
Rinse or Backwash as Directed Clean the membrane according to the product instructions when flow becomes slower due to accumulated particles.
04
Protect the Wet Membrane from Freezing Once used, water may remain inside the fibers. Freezing can damage the membrane structure and affect filtration integrity.
05
Follow Storage Instructions Clean and store the filter as described in the product manual when it will not be used for an extended period.
06
Replace at the End of Service Life Replace the filter when its rated capacity is reached, the membrane is damaged, or normal flow cannot be restored after cleaning.
Filtration performance varies by product model, membrane specification, source-water quality, operating conditions, and maintenance. Hollow fiber UF filtration is one component of the complete filtration system.