Compact 33V

Summary

Product identification

This document describes the X-Flow COMPACT 33V Ultrafiltration membrane, an 8-inch module with a 5.2 mm hydraulic membrane diameter.

• Article Code: 78C1KPB99S
• Membrane Material: Polyvinylidene fluoride (PVDF)
• Carrier Material: Composite polyester woven/non woven
• Membrane Characteristics:
  • Hydrophilic tubular polyvinylidene fluoride membrane cast on a polyester carrier
  • Structure asymmetric
  • Mean pore size of 30 nm
  • Developed for use in large-scale processes for water purification
  • High performance and very good anti-fouling behaviour
  • Membrane elements can be backflushed for efficient membrane cleaning, resulting in a higher average product flux

Mechanical / hydraulic

• Membrane diameter: 5.2 mm
• Membrane area: 33 m²
• Feed connection D0: 220.0 mm
• Module length L0: 3000 mm (±1)
• Saddle diameter D1: 240 mm
• Module diameter D2: 213 mm
• Permeate connection d0: 73.0 mm
• Permeate length I0: 165 mm (±1)
• Permeate position I1: 90 mm (±1)
• Weight Specifications:
  • Dry weight of membrane element: ca. 45 kg [100 lbs]
  • Membrane element filled with water: ca. 110 kg [242 lbs]
• Materials of Construction:
  • Housing: PVC, drinking water quality
  • Potting: EP resin
  • Membrane: Polyvinylidene fluoride (PVDF)
• Process Characteristics (water, 20°C):
  • Hydraulic membrane diameter: 5.2 mm
  • Crossflow flow rate: 53.5 x v (where v is superficial velocity in m/s)
  • Pressure-drop across module (laminar flow): 1.2 x L0 x v (where L0 is module length in m)
  • Pressure-drop across module (turbulent flow): 3.6 x L0 x v¹·⁷⁵ (where L0 is module length in m)

Operating limits

• Max. feed pressure:
  • 800 kPa at 20 °C
  • 650 kPa at 30 °C
  • 450 kPa at 40 °C
• Max. permeate pressure:
  • 650 kPa at 20 °C
  • 550 kPa at 30 °C
  • 450 kPa at 40 °C
• Max. transmembrane pressure (TMP): -100 ~ +500 kPa (negative TMP correlates with backwash pressure)
• Max. process temperature: 40 °C
• Cleaning/disinfection pH: 1 to 11
• Cleaning/disinfection temperature: Not to exceed 40 °C
• Storage temperature: 0 to 40 °C (do not subject to freezing temperatures)
• Backwash water: Should be free of particulates and of permeate quality or better.
• Temperature changes: Do not subject the membrane module or element to sudden temperature changes, particularly decreases. Bring the module or element back to ambient operating temperature slowly (typical value 3 °C/min).

Applications

• Pre-treatment RO and NF
• Surface water
• Drinking and process water production
• Recovery of sandfilter backwash water
• Effluent treatment
• Membrane bioreactor
• Wastewater treatment
• Treatment of oil-in-water emulsions

Cleaning and Chemical Resistance

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

• General Solvent Resistance:
  • Acids, pH >2: +
  • Bases, pH <11: +
  • Organic esters, ketones, ethers: --
  • Aliphatic alcohols: ++
  • Aliphatic hydrocarbons: ++
  • Halogenated hydrocarbons: ++
  • Aromatic hydrocarbons: +
  • Polar organic solvents: --
  • Oils: ++
  • Sodium Hypochlorite:
    • Typical 200 ppm, at ≤ 40 °C
    • Maximum 500 ppm
    • 250,000 ppm hours cumulative at 30 °C
• Cleaning Chemical Resistance (depending on feed solution):
  • NaOCl (active chlorine): 500 ppm max.
  • H₂O₂: 1000 ppm max.
  • NaOH: pH ≤ 11
  • Nitric acid: pH ≥ 1
  • Phosphoric acid: pH ≥ 1
  • EDTA: pH ≤ 11
  • Citric acid
  • Enzymatic compounds

Storage

New membrane modules can be stored as supplied.

• Store in a dry, normally ventilated place, away from sources of heat, ignition, and direct sunlight.
• Store between 0 and 40 °C.
• Membrane modules should not be subjected to any freezing temperatures.
• After use, UF membranes need to be stored wet at all times.
• To avoid biological growth during shutdowns or storage, wet membranes should be treated with a compatible biocide.
• For short-term shutdowns, a daily flush with permeate quality water containing up to 2.0 ppm free available chlorine for 30 to 60 minutes may be adequate for bacteria control.
• For long-term storage, membranes should be cleaned before disinfection. A 1% sodium metabisulfite solution can be used for disinfection.
• In either situation, modules should be stored hydraulically filled.

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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