XIGA 55

Summary

Product identification

The X-Flow XIGA 55 is an ultrafiltration membrane element designed for process and potable water filtration. It operates in a dead-end mode with regular backwash (permeate only) and chemically enhanced backwash.

• Article Code: 23E2FL395A
• Membrane Type: Hydrophilic membrane composed of a blend of polyvinylpyrrolidone and polyethersulfone (PES/PVP).
• Structure: Asymmetric/microporous
• Nominal Pore Size: 20 nm
• Key Features: High performance and very good anti-fouling behavior.
• Typical Applications: Filtration of surface water, large-scale drinking and process water production.
• Performance:
  • Typical permeate quality SDI<3, turbidity <0.1 NTU
  • 99.9999% (LOG6) reduction of bacteria (Pseudomonas diminuta) by mechanical means.
  • 99.99% (LOG 4) reduction of virus (MS2 colifages) by mechanical means.
  • EPA Est. No. 090374-NLD-001

Operating limits

• Max. transmembrane pressure: 300 kPa [43 psi]
• Max. backflush pressure: 300 kPa [43 psi]
• Temperature range: 0-40 °C [32-104 °F]
• Max. system pressure: See specifications of membrane housing supplier (Codeline or equivalent).
• pH during filtration:
  • Acids: pH > 2
  • Bases: pH < 12
• pH during cleaning:
  • Acids: pH > 1
  • Bases: pH < 13
• Temperature change: Do not subject the membrane module or element to sudden temperature changes, particularly decreasing. Bring the module or element back to ambient operating temperature slowly (max. value 3 °C/min).

Feed water

• Backwash water should be free of particulates and should be of UF permeate quality or better.

Mechanical / hydraulic

• Membrane Diameter: 0.8 mm [31 mil]
• Membrane Area: 55 m² [590 ft²]
• Feed Connection D0: 220.0 mm [8.66 Inch]
• Module Length L0: 1537.5 mm [60.51 Inch]
• Permeate Connection d0: 42.6 mm [1.68 Inch]
• Dry weight of membrane element: ca. 34 kg [75 lbs]
• Membrane element filled with water: ca. 66 kg [145 lbs]
• Materials of Construction:
  • Housing: PVC white
  • Flow distributor: PVC/PP
  • Potting: PU resin
  • Membrane: PES/PVP

Chemical resistance

General Solvent Resistance (guideline only):

• Acids: ++
• Bases: ++
• Aliphatic alcohols: +
• Aliphatic hydrocarbons: +
• Halogenated hydrocarbons: --
• Aromatic hydrocarbons: --
• Polar organic solvents: --
• Oils: ++

Cleaning Chemical Resistance:

• Acids:
  • Hydrochloric Acid: ++
  • Nitric Acid: ++
  • Sulphuric Acid: ++
  • Phosphoric Acid: ++
  • Acetic Acid: ++
  • Citric Acid: ++
• Bases:
  • Sodium Hydroxide (<4%): ++
  • Potassium Hydroxide (<4%): ++

Oxidant Chemical Resistance (individual oxidizing agent):

• Sodium Hypochlorite (NaOCl):
  • Typical: 200 ppm, at ≤ 40 °C at ≥ pH 10
  • Maximum: 500 ppm
  • Cumulative: 250,000 ppm hours; ≥ pH 10
• Chlorine Dioxide (ClO₂):
  • Typical: 1 ppm, at ≤ 40 °C
  • Maximum: 2 ppm
  • Cumulative: 90,000 ppm hours
• Hydrogen Peroxide (H₂O₂):
  • Typical: 200 ppm, at ≤ 40 °C
  • Maximum: 500 ppm
  • Cumulative: 350,000 ppm hours
• Combined exposure (NaOCl + ClO₂): 2.6 x Exposure to ClO₂ (in ppm hours) + Exposure to NaOCl (in ppm hours) < 250,000 ppm hours.

Storage

• New membrane modules: Can be stored as supplied in the original packaging.
• Preservation solution (new modules): Aqueous solution of glycerine (20wt%) and sodium metabisulfite (1wt%).
• Storage conditions: Dry, normally ventilated place, away from sources of heat, ignition, and direct sunlight. Store between 0 and 40 °C. Do not subject to any freezing temperatures.
• Shelf life: Maximum 6 months for unused modules in unopened packaging under correct storage conditions after transfer of ownership.
• After use: UF membrane modules need to be stored wet at all times.
• Short-term shutdowns (1 – 7 days): A daily backwash with UF permeate quality water for 30 seconds at 250 lmh should be adequate for bacteria control. Modules must be cleaned by a standard Chemical Enhanced Backwash (CEB) before the shutdown period.
• Long-term storage (> 7 days): Membranes should be disinfected after a CEB. A 0.5% sodium metabisulfite solution can be used for disinfection. In both short and long-term storage, modules should remain filled with storage solution.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the official OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror