X-Flow-HFW1000

Summary

Product identification

This document describes the X-Flow HFW 1000 nanofiltration module, specifically the 8” HFW 1000 PVC 0.8mm element.

• Article Code: 2871FN2MENH
• Type: Nanofiltration Membrane Element
• Typical Applications: Production of process and potable water; filtration of surface water, potable water, and WWTP effluent for removal of color components (humic or fulvic acids); minimal salt retention.
• Mode of operation: Feed-and-bleed with crossflow, regular backwash (permeate only), and chemical cleaning.

Membrane Characteristics

• Material: Hydrophilic membrane composed of modified polyethersulfone and polyethersulfone.
• Structure: Highly asymmetric/microporous.
• Molecular Weight Cut-Off (MWCO): 1000 Da (Dextrane).
• Performance:
  • High performance and very good anti-fouling behavior.
  • 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.

Mechanical / Hydraulic

Membrane Element Dimensions

• Membrane Diameter: 0.8 [31] mm/mil
• Membrane Area: 40 [430] m²/ft²
• Feed connection D0: 220.0 [8.66] mm/Inch
• Element outer diameter D1: 200 [7.9] mm/Inch
• Element length L0: 1537.5 [60.51] mm/Inch
• Permeate connection d0: 42.6 [1.68] mm/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

Operating limits

• Max. system pressure: 700 [100] kPa/psi
• Max. transmembrane pressure: 600 [86] kPa/psi
• Max. backflush pressure: 600 [86] kPa/psi
• Temperature range: 0-40 [32-104] °C/°F

Process Characteristics (Water, 20 ºC)

• Hydraulic membrane diameter: 0.8 [43] mm/mil
• Crossflow flow rate: 19.8 x v [26 x v] m³/h/gpm (where v is superficial velocity in m/s [ft/s])
• Pressure-drop across module at 1 m/s: 72 [10] kPa/psi
• Pressure-drop across module at 2 m/s: 150 [21] kPa/psi

Chemical Resistance

The resistance of the membrane to solvents and cleaning chemicals is provided as a guideline.

• Solvent Resistance:

  • Acids: ++ (Strong resistance)
  • Bases: ++ (Strong resistance)
  • Organic esters, ketones, ethers: - (Limited resistance)
  • Aliphatic alcohols: + (Resistance)
  • Aliphatic hydrocarbons: + (Resistance)
  • Halogenated hydrocarbons: -- (Not recommended)
  • Aromatic hydrocarbons: -- (Not recommended)
  • Polar organic solvents: -- (Not recommended)
  • Oils: ++ (Strong resistance)

• Cleaning Chemical Resistance: The HFW 1000 can withstand chemical cleaning with chlorine for its entire lifetime, according to Pentair's process design. Exposure limits are affected by temperature, pH, and the presence of metals.

  • Sodium Hypochlorite: Typical 200 ppm, at ≤ 40 ºC and ≥ pH 10. Cumulative exposure: 150,000 ppm hours at pH 11.
  • Acids:
    • Hydrochloric Acid: ++ (Strong resistance)
    • Nitric Acid: ++ (Strong resistance)
    • Sulphuric Acid: ++ (Strong resistance)
    • Phosphoric Acid: ++ (Strong resistance)
    • Acetic Acid: ++ (Strong resistance)
    • Citric Acid: ++ (Strong resistance)
    • pH > 3 during filtration
    • pH > 2 during cleaning
  • Bases:
    • Sodium Hydroxide (<4%): ++ (Strong resistance)
    • Potassium Hydroxide (<4%): ++ (Strong resistance)
    • pH < 11 during filtration
    • pH < 12 during cleaning

Certifications

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

Storage

New membrane modules:

• Can be stored as supplied in original packaging.
• Contain an aqueous preservation solution of glycerine (20wt%) and sodium metabisulfite (1wt%).
• Store in a dry, normally ventilated place, away from heat, ignition, and direct sunlight.
• Storage temperature: Between 0 and 40 °C.
• Must not be subjected to freezing temperatures.
• Shelf life: Maximum 6 months for unused modules in unopened packaging under correct storage conditions.

After use (wet storage):

• Must be stored wet at all times.
• For short-term shutdowns (1–7 days), a daily backwash with permeate quality water should be adequate for bacterial control. Modules must be cleaned by a standard Chemical Cleaning before shutdown.
• For 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, 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. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet