X-Flow-Xiga-40

Summary

Product identification

The X-Flow Xiga 40 is an ultrafiltration (UF) membrane element designed for process and potable water filtration. It is optimized for dead-end operation with regular backwash (permeate only) and chemically enhanced backwash. Typical applications include the filtration of surface water and large-scale drinking and process water production.

• Model: Xiga 40
• Article Code: 2872FL395A (Xiga HP)
• Membrane Type: Hydrophilic, composed of a blend of polyvinylpyrrolidone (PVP) and polyethersulfone (PES).
• Structure: Asymmetric/microporous
• Nominal Pore Size: 20 nm
• Key Features: High performance and very good anti-fouling behavior.

Mechanical / Hydraulic

• 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: approx. 25 kg [55 lbs]
• Membrane Element Filled with Water: approx. 55 kg [121 lbs]

Materials of Construction

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

Operating Limits

• Maximum Trans-Membrane Pressure: 300 kPa [43 psi]
• Maximum Backflush Pressure: 300 kPa [43 psi]
• Temperature Range: 0–40 °C [32–104 °F]
• Maximum Process Temperature: Do not exceed 40 °C.
• Maximum Temperature Change Rate: 3 °C/min (when returning to ambient).
• pH during filtration: > 2 (acidic), < 12 (basic)
• pH during cleaning: > 1 (acidic), < 13 (basic)
• Maximum System Pressure: See specifications of membrane housing supplier.
• Backwash water quality: Should be free of particulates and of UF permeate quality or better.
• Backwash pumps: Preferably non-corroding materials (e.g., plastic or stainless steel). Avoid two-phase air/water mixture if using compressed air.

Product Water

• Typical Permeate Quality:
  • SDI < 3
  • Turbidity < 0.1 NTU
• Reduction Capabilities (by mechanical means):
  • 99.9999% (LOG6) reduction of bacteria (Pseudomonas diminuta)
  • 99.99% (LOG4) reduction of virus (MS2 colifages)
  • EPA Est. No. 090374-NLD-001

Chemical Resistance

General Solvent Resistance (guideline)

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

Cleaning Chemical Resistance

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

Oxidizing Agents (individual limits)

Exposure limits are affected by temperature, pH, and the presence of metals. Reduce exposure to a minimum to maximize membrane lifetime.

• 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 Oxidant Exposure

The total combined exposure for Sodium Hypochlorite and Chlorine Dioxide is calculated as follows: Combined exposure (NaOCl + ClO₂) = 2.6 x Exposure to ClO₂ (in ppm hours) + Exposure to NaOCl (in ppm hours) < 250,000 ppm hours.

Storage

• Wet Storage: UF membrane modules must be stored wet at all times after use.
• Biocidal Treatment: Compatible biocides should be used to avoid biological growth during shutdowns or storage.
• Short-Term Shutdowns (1–7 days): A daily backwash with UF permeate quality water for 30 seconds at 250 lmh is recommended for bacteria control. Modules must be cleaned by a standard Chemical Enhanced Backwash (CEB) before the shutdown period.
• Long-Term Storage (> 7 days): Modules should be disinfected after a CEB. A 0.5% sodium metabisulfite solution can be used. Modules should remain filled with storage solution.
• New Modules: Can be stored as supplied in original packaging. Elements contain an aqueous preservation solution of glycerine (20wt%) and sodium metabisulfite (1wt%).
• Storage Conditions: Store in a dry, normally ventilated place, away from heat, ignition, and direct sunlight, between 0 and 40 °C. Do not subject to freezing temperatures.
• Shelf Life: Maximum 6 months for unused modules in unopened packaging under correct storage conditions.

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Disclaimer: This summary is based on the provided text extract and may not include all figures, footnotes, or the latest revisions from the original OEM PDF datasheet. For contractual data and complete information, please refer to the specific OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet