HFW1000

Summary

Product identification

• Product Name: HFW 1000
• Membrane Type: Nanofiltration (NF) Membrane
• Product Line: X-flow HFW 1000
• Module Description: 8” HFW 1000 PVC 0.8mm
• Article Code: 2871FN2MENH
• Membrane Material: Hydrophilic membrane composed of modified polyethersulfone (PESm) and polyethersulfone (PES)
• Membrane Structure: Highly asymmetric/microporous
• Molecular Weight Cut-Off (MWCO): 1000 Da (Dextrane)
• Typical Applications: Production of process and potable water, filtration of surface water, potable water, and WWTP effluent for removal of color components (typically humic or fumic acids), and minimal salt retention.
• Mode of Operation: Feed-and-bleed with a crossflow, regular backwash (permeate only), and chemical cleaning.

Mechanical / hydraulic

• Element Specifications:
  • Membrane Diameter: 0.8 mm [31 mil]
  • Membrane Area: 40 m² [430 ft²]
  • Feed Connection D0: 220.0 mm [8.66 Inch]
  • Element Outer Diameter D1: 200 mm [7.9 Inch]
  • Element Length L0: 1537.5 mm [60.51 Inch]
  • Permeate Connection d0: 42.6 mm [1.68 Inch]
• Weight Specifications:
  • Dry weight of membrane element: ca. 27 kg [59 lbs]
  • Membrane element filled with water: ca. 57 kg [125 lbs]
• Materials of Construction:
  • Housing: PVC white
  • Flow distributor: PES
  • Potting: EP resin
  • Membrane: PESm/PES
• Hydraulic Characteristics (Water, 20 ºC):
  • Hydraulic membrane diameter: 0.8 mm [43 mil]
  • Crossflow flow rate (*): 19.8 x v m³/h [26 x v gpm] (where v is superficial velocity in m/s [ft/s])
  • Pressure-drop across module at 1 m/s: 72 kPa [10 psi]
  • Pressure-drop across module at 2 m/s: 150 kPa [21 psi]

Operating limits

• Max. system pressure: 700 kPa [100 psi]
• Max. transmembrane pressure: 600 kPa [86 psi]
• Max. backflush pressure: 600 kPa [86 psi]
• Temperature range: 0-40 °C [32-104 °F]
• pH during filtration: > 3 and < 11
• pH during cleaning: > 2 and < 12
• Backwash water should be permeate quality or better.
• Avoid sudden temperature changes, particularly decreases, to prevent mechanical damage.

Product water

• Molecular Weight Cut-Off (MWCO): 1000 Da (Dextrane)
• Provides > 4-log (99.99 percent) reduction of viruses.
• Typical permeate quality: SDI < 3, turbidity < 0.1 NTU.
• Designed for color removal; typical process retention of > 90% (Pt-Co).
• Minimal salt rejection to maintain salt balance.

Cleaning chemical Resistance

• General Solvent Resistance (guideline only):
  • Acids: ++
  • Bases: ++
  • Organic esters, ketones, ethers: -
  • Aliphatic alcohols: +
  • Aliphatic hydrocarbons: +
  • Halogenated hydrocarbons: --
  • Aromatic hydrocarbons: --
  • Polar organic solvents: --
  • Oils: ++
• Specific Chemical Resistance:
  • The HFW 1000 is able to withstand chemical cleaning with chlorine for entire membrane lifetime according to Pentair’s process design.
  • Sodium Hypochlorite:
    • Typical 200 ppm, at ≤ 40 ºC at ≥ pH 10
    • 150,000 ppm hours cumulative; pH 11
  • Acids:
    • Hydrochloric Acid: ++
    • Nitric Acid: ++
    • Sulphuric Acid: ++
    • Phosphoric Acid: ++
    • Acetic Acid: ++
    • Citric Acid: ++
  • Bases:
    • Sodium Hydroxide (<4%): ++
    • Potassium Hydroxide (<4%): ++
  • It is advised to reduce membrane exposure to oxidizing agents to a minimum. 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.

Certifications

• USA: ANSI/NSF, Standard 61
• UK: DWI Regulation 31 (pending)
• The Netherlands: KIWA ATA
• France: ACS (pending)
• ISO 9001

Storage

• New Membrane Modules:
  • Store as supplied in original packaging, in a dry, normally ventilated place, away from sources of heat, ignition, and direct sunlight.
  • Storage temperature: Between 0 and 40 °C.
  • Do not subject to any freezing temperatures.
  • Preservation solution: Aqueous solution of glycerine (20wt%) and sodium metabisulfite (1wt%).
  • Shelf life: Maximum 6 months for unused modules in unopened packaging under correct storage conditions.
• After Use:
  • NF membrane modules need to be stored wet at all times.
  • Short-term shutdowns (1 – 7 days): A daily backwash with permeate quality water should be adequate for bacteria control. Modules must be cleaned by a standard Chemical Cleaning before the shutdown period.
  • Long-term storage (> 7 days): Membranes should be chemically cleaned before disinfection. A 0.5% sodium metabisulfite solution can be used for disinfection.
  • In both short and long-term storage situations, modules should remain filled with storage solution.
  • Do not use chlorine for storage.

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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 original OEM PDF datasheet. For contractual purposes, all data must be verified against the specific OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror