XIGA 40

Summary

Product identification

The X-Flow XIGA 40 is an ultrafiltration membrane element (Article Code: 2872FL395A) designed for process and potable water filtration. It features a hydrophilic membrane composed of a blend of polyvinylpyrrolidone and polyethersulfone, with an asymmetric/microporous structure and a nominal pore size of 20 nm. The product is noted for high performance and very good anti-fouling behavior. It is used for dead-end applications with regular backwash (permeate only) and chemically enhanced backwash.

Typical applications include the filtration of surface water, large-scale drinking water, and process water production.

Operating limits

• Max. transmembrane pressure: 300 kPa [43 psi]
• Max. backflush pressure: 300 kPa [43 psi]
• Temperature range: 0-40 °C [32-104 °F]
• pH during filtration: > 2 and < 12
• pH during cleaning: > 1 and < 13
• Max. process temperature: Do not exceed 40 °C.
• Max. temperature change rate: 3 °C/min.
• Max. system pressure: See specifications of membrane housing supplier.

Operation at any combination of maximum limits of pH, concentration, pressure, or temperature will influence membrane lifetime. Backwash water should be free of particulates and of UF permeate quality or better.

Product water

• Typical permeate quality: SDI<3, turbidity <0.1 NTU
• Bacteria reduction: 99.9999% (LOG6) reduction of bacteria (Pseudomonas diminuta) by mechanical means.
• Virus reduction: 99.99% (LOG4) reduction of virus (MS2 colifages) by mechanical means.
• EPA Est. No. 090374-NLD-001

Mechanical / hydraulic

• Membrane diameter: 0.8 mm [31 mil]
• Membrane area: 40 m² [430 ft²]
• Element length L0: 1527.5 mm [60.14 Inch]
• Permeate collector inner diameter d0: 42.6 mm [1.68 Inch]
• Element outer diameter D0: 200 mm [7.9 Inch]
• Dry weight of membrane element: ca. 25 kg [55 lbs]
• Membrane element filled with water: ca. 55 kg [121 lbs]

Materials of Construction:

• Housing: PVC white
• Flow distributor: PVC
• Potting: PU resin
• Membrane: PES/PVP

Cleaning Chemical Resistance

The resistance of the membrane to solvents and cleaning chemicals depends on actual process conditions. The following are guidelines:

Acids:

• Hydrochloric Acid: ++
• Nitric Acid: ++
• Phosphoric Acid: ++
• Acetic Acid: ++
• Citric Acid: ++

Bases:

• Sodium Hydroxide (<4%): ++
• Potassium Hydroxide (<4%): ++

Oxidants:

• 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; pH 11
• 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.

Exposure limits are affected by temperature, pH, and the presence of metals. Membranes must be preserved free of any oxidizing agent when the plant is stopped.

General Solvent Resistance

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

Storage

New membrane modules can be stored as supplied in the original packaging. The elements contain an aqueous preservation solution of glycerine (20wt%) and sodium metabisulfite (1wt%).

• Storage conditions: Dry, normally ventilated place, away from sources of heat, ignition, and direct sunlight.
• Storage temperature: Between 0 and 40 °C.
• Do not subject to freezing temperatures.
• Shelf life: Maximum of 6 months for unused modules in unopened packaging under correct storage conditions.

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. In both short and long-term storage, modules should remain filled with the storage solution.

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Disclaimer: This summary is based on extracted text and may miss figures, footnotes, or recent revisions from the original PDF datasheet. Contractual data must always match the specific OEM PDF revision used for the project.

Official datasheet (PDF)

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