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X-Flow XF55

Rated 4.5/5 based on 17 customer reviews
Product Line: PENTAIR
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Brand: UF Membranes

ATS Water Technology offers Pentair X-Flow XF55 Membrane Elements, which are based on a hydrophilic hollow fiber ultrafiltration membrane composed of a PES/PVP blend. They have high mechanical and chemical resistance making them suitable for many applications. Pressurized membrane elements with an inside-out configuration are the industry's choice for the removal of bacteria, viruses, suspended solids and colloids.



  • Removal of microorganisms
    • 99.9999% (LOG6) reduction of bacteria (Pseudomonas diminuta)
    • 99.99% (LOG 4) reduction of viruses (MS2 coliphages) by mechanical means 
  • High membrane packing density: One of the industry’s smallest free volume in a membrane elements
  • 100% integrity testing on individual fibers
  • Individual fiber repair
  • Very good antifouling behavior
  • Typical permeate quality:
    • SDI < 3
    • Turbidity < 0.1NTU
  • Excellent chemical resistance:
    • Wide pH range: 2 – 12
    • High chlorine stability:maximum free chlorine 250 mg/l
  • Typical high permeability: low energy consumption


The core of the XF55 Membrane Element is the single-fiber, inside-out filtration process that delivers a robust solution. The Membrane Elements are operated vertically and can be utilized in two of Pentair X-Flow's unique Solutions: 

  • Xiga
  • Aquaflex
  • X-Line


Potable water production 

The X-Flow XF55 Membrane Elements provide superior separation performance and effective rejection of viruses and chlorine-resistant organisms such as Cryptosporidium and Giardia.
Process water production
The XF55 Membrane Elements offer an effective barrier to suspended solids and silt. The permeate can be used directly or, if salinity and dissolved solids are not within the required limits, the permeate can be fed to a downstream RO system.

Effluent polishing

The X-Flow XF55 are a reliable solution to meeting the highest standards for turbidity and microbiology. The polished effluent is ready for high- grade and unrestricted reuse applications.
Pretreatment for Seawater Reverse Osmosis systems

X-Flow's XF55 offer an effective barrier to suspended solids and silt. The almost total removal of suspended solids protects the SWRO from fouling.


Membrane surface area

 55 m²

Module dimensions (dxl)

8.7” x 1537.5 mm

Housing material


Membrane material


Hydraulic membrane diameter

0.8 mm

Nominal pore size

20 nm (0.02µm)

The Pentair X-Flow XF55 Membrane Element is formally known as Aquaflex 55, Xiga 55, Seaflex 55 and Seaguard 55.




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