X-Flow-R21-0-9UFC

Summary

Product identification

The R-21 0.9UFC is an ultrafiltration module designed for process water production. Typical applications include filtration of surface water and WWTP effluent.

• Product Name: R-21 0.9UFC
• Article Code: 1521BL895E
• Membrane Type: Ultrafiltration Membrane
• Mode of operation: Feed-and-bleed with minor crossflow, or dead-end with regular backwash (permeate only) and chemically enhanced backwash.

Membrane Characteristics

• Composition: Hydrophilic membrane composed of a blend of polyvinylpyrrolidone and polyethersulfone (PES/PVP).
• Nominal pore size: 20 nm.
• Structure: Asymmetric/microporous.
• Performance: High performance with very good anti-fouling behavior.
• Certifications: EPA Est. No. 090374-NLD-001 (for bacteria/virus reduction claims).

Module Specifications

• Membrane Diameter: 0.9 mm / 35 mil
• Membrane Area: 4.3 m² / 46.3 ft²
• Module Length A: 1124 mm / 44.3 inch
• Permeate Length B: 71 mm / 2.8 inch
• Permeate Position C: 87 mm / 3.4 inch
• Feed Connection Diameter D: 63 mm / 2.5 inch
• Permeate Connection Diameter E: 20 mm / 0.8 inch

Materials of Construction

• Housing: PVC-C
• Potting: Epoxy
• Membrane: PES/PVP

Operating Limits

• Max. system pressure: 600 kPa / 86 psi @ 20°C
• Max. transmembrane pressure: 300 kPa / 43 psi
• Max. backflush pressure: 300 kPa / 43 psi
• Temperature range: 0 - 60 °C / 32 - 140 °F
• Burst pressure: > 14 bar
• Collapse pressure: > 10 bar

Mechanical / Hydraulic

• Hydraulic membrane diameter: 0.8 mm / 31 mil
• Crossflow flow rate: 3.4 x v m³/h / 15.0 x v gpm (where 'v' is superficial velocity in m/s [ft/s])
• Pressure-drop across module at 1 m/s: 40 kPa / 5.80 psi
• Pressure-drop across module at 2 m/s: 84 kPa / 12.18 psi

Product water

• Typical permeate quality: SDI < 3, turbidity < 0.1 NTU
• Reduction of bacteria: 99.9999% (LOG6) of Pseudomonas diminuta by mechanical means.
• Reduction of virus: 99.99% (LOG4) of MS2 coliphages by mechanical means.
• Backwash water quality: Should be free of particulates and of UF permeate quality or better.

Chemical Resistance

The resistance of the membrane to solvents strongly depends on actual process conditions. These are guidelines only.

Solvent Resistance

• Acids: ++
• Bases: ++
• Organic esters, ketones, ethers: -
• 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 during filtration: > 2
  • pH during cleaning: > 1
• Bases:
  • Sodium Hydroxide: ++
  • Potassium Hydroxide: ++
  • pH during filtration: < 12
  • pH during cleaning: < 13

Oxidant Contact Limits

The figures below represent the membrane resistance to each individual oxidizing agent.

• Sodium Hypochlorite (NaOCl)
  • Typical: 200 ppm, at ≤ 40 °C, at ≥ pH 9
  • Maximum: 500 ppm
  • Cumulative: 250,000 ppm hours; pH 11
• 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 for Sodium Hypochlorite and Chlorine Dioxide: Calculated as: 2.6 x Exposure to ClO₂ (in ppm hours) + Exposure to NaOCl (in ppm hours) < 250,000 ppm hours. To maximize membrane lifetime, minimize exposure to oxidizing agents. Exposure limits are affected by temperature, pH, and the presence of metals. During plant shutdowns, membranes must be preserved free of any oxidizing agent.

Storage

• New Modules: Store as supplied in original packaging. Elements contain an aqueous preservation solution of glycerine (20 wt%) and sodium metabisulfite (1 wt%).
• Storage Conditions: Dry, normally ventilated place, away from heat sources, ignition, and direct sunlight.
• Temperature Range: Store 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.
• After Use: UF membrane modules must be stored wet at all times.
• Short-term shutdowns (1 – 7 days): A daily backwash with UF permeate quality water for 30 seconds at 215 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. Modules should remain filled with storage solution in both short and long-term situations. Compatible biocides can be used to avoid biological growth.

Certifications

• ISO 9001

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

Official datasheet (PDF)

PDF datasheet