R-21 0.83UFC

Summary

Product identification

The R21 0.83UFC is an ultrafiltration module, ARTICLE CODE: 1521BL895E, used for the production of process water. Typical applications include filtration of surface water and WWTP effluent.

Membrane Characteristics:

• Hydrophilic membrane composed of a blend of polyvinylpyrrolidone and polyethersulfone (PES/PVP).
• Nominal pore size: 20 nm.
• Structure: asymmetric/microporous.
• High performance and very good anti-fouling behavior.
• Effective membrane area: 3.8 m² [40.9 ft²].
• Membrane diameter: 0.83 mm [32.7 mil].

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]
• Maximum temperature change: 3 °C/min
• pH during filtration: > 2 and < 12
• pH during cleaning: > 1 and < 13

Feed water

The mode of operation is feed-and-bleed with a minor crossflow or dead-end mode with regular backwash (permeate only) and chemically enhanced backwash. 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.
• Membrane filtration provides 99.9999% (LOG6) reduction of bacteria (Pseudomonas diminuta) and 99.99% (LOG 4) reduction of virus (MS2 colifages) by mechanical means.

Mechanical / hydraulic

Module Specifications:

• Module length A: 1130 mm [44.5 inch]
• Permeate length B: 71 mm [2.8 inch]
• Permeate position C: 90 mm [3.5 inch]
• Feed connection diameter D: 75 mm [3.0 inch]
• Permeate connection diameter E: 20 mm [0.8 inch]

Materials of Construction:

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

Process Characteristics (water, 20 °C):

• Hydraulic membrane diameter: 0.83 mm [32.7 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]

General Solvent Resistance

(Indications are guidelines only, as resistance depends on actual process conditions.)

• 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: ++

Bases:

• Sodium Hydroxide: ++
• Potassium Hydroxide: ++

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 Oxidant Exposure: The total combined exposure for Sodium Hypochlorite and Chlorine Dioxide is calculated as: Combined exposure (NaOCl + ClO₂) = 2.6 x Exposure to ClO₂ (in ppm hours) + Exposure to NaOCl (in ppm hours) < 250,000 ppm hours. Note: Exposure limits are affected by temperature, pH, and the presence of metals. It is advised to reduce membrane exposure to oxidizing agents to a minimum and preserve membranes free of any oxidizing agent when the plant is stopped.

Certifications

• ISO 9001
• EPA Est. No. 090374-NLD-001

Storage

New membrane modules are supplied with an aqueous preservation solution of glycerine (20wt%) and sodium metabisulfite (1wt%). Modules should be stored in a dry, normally ventilated place, away from heat, ignition sources, and direct sunlight. Storage temperature should be between 0 and 40 °C. The membrane shelf life is a maximum of 6 months from the date the modules are announced ready for delivery ex works Pentair warehouse.

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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