X-Flow-Xiga-55

Summary

Product identification

The Pentair X-Flow XIGA 55 is an Ultrafiltration (UF) membrane element, also referred to as XIGA HP, designed for advanced filtration.

• Article Code: 23E2FL395A
• Applications:
  • Process and potable water filtration
  • Filtration of surface water
  • Large-scale drinking and process water production
• Operating Mode: Dead-end with regular backwash (permeate only) and chemically enhanced backwash.

Membrane Characteristics

• Material: Hydrophilic membrane composed of a blend of polyvinylpyrrolidone (PVP) and polyethersulfone (PES).
• Pore size: A nominal pore size of 20 nm
• Structure: Asymmetric/microporous
• Performance:
  • High performance and very good anti-fouling behavior
  • Typical permeate quality: SDI<3, turbidity <0.1 NTU
  • Provides 99.9999% (LOG6) reduction of bacteria (Pseudomonas diminuta) by mechanical means.
  • Provides 99.99% (LOG4) reduction of virus (MS2 colifages) by mechanical means.
  • EPA Est. No. 090374-NLD-001

Element Specifications

• Membrane area: 55 m² [590 ft²]
• Membrane Diameter: 0.8 mm [31 mil]
• 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]
• Weight:
  • Dry: ca. 34 kg [75 lbs]
  • Filled with water: ca. 66 kg [145 lbs]

Operating limits

• Max. trans-membrane pressure: 300 kPa [43 psi]
• Max. backflush pressure: 300 kPa [43 psi]
• Temperature range: 0-40 °C [32-104 °F]
• Max. process temperature: Do not exceed 40 °C.
• Max. temperature change (decreasing): Do not exceed 3 °C/min.
• Max. system pressure: See specifications of the membrane housing supplier.
• Backwash water: Should be free of particulates and of UF permeate quality or better.
• Backwash pumps should preferably be made of non-corroding materials (e.g., plastic or stainless steel).

Chemical Resistance

The indications are guidelines and membrane resistance depends on actual process conditions.

General Solvent Resistance

• 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: ++
  • pH > 2 during filtration
  • pH > 1 during cleaning
• Bases:
  • Sodium Hydroxide (<4%): ++
  • Potassium Hydroxide (<4%): ++
  • pH < 12 during filtration
  • pH < 13 during cleaning
• Oxidants:
  • Sodium Hypochlorite (NaOCl):
    • Typical: 200 ppm, at ≤ 40 °C at ≥ pH 10
    • Maximum: 500 ppm
    • Cumulative: 250,000 ppm hours; at ≥ 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): Calculated as 2.6 x Exposure to ClO₂ (in ppm hours) + Exposure to NaOCl (in ppm hours) < 250,000 ppm hours.
  • It is advised to reduce membrane exposure to oxidizing agents to a minimum to maximize membrane lifetime. 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.

Materials of Construction

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

Storage

• Wet Storage: After use, UF membrane modules must always be stored wet.
• Biocide Use: To avoid biological growth during shutdowns or storage, wet membranes can be treated with a compatible biocide. The membrane is compatible with many common disinfecting agents or biocidal preservatives.
• 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, after a standard Chemical Enhanced Backwash (CEB).
• Long-term storage (> 7 days): Membranes should be disinfected after being cleaned using a CEB. A 0.5% sodium metabisulfite solution can be used for disinfection. Modules should remain filled with storage solution in both short and long-term storage.
• New Modules: Stored as supplied in original packaging. Elements contain an aqueous preservation solution of glycerine (20wt%) and sodium metabisulfite (1wt%).
• Storage Conditions: Dry, normally ventilated place, away from heat, ignition, and direct sunlight.
• Storage Temperature: Between 0 and 40 °C.
• Freezing: Membrane modules should not be subjected to any freezing temperatures.
• Shelf Life: Maximum of 6 months for unused modules in unopened packaging under correct storage conditions. Beyond this, all warranties are void.

---

Disclaimer: This summary is based on the provided text extract and may not include all figures, footnotes, or the latest revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet