X-Flow-Compact-27-Helix

Summary

Product identification

• Product Name: X-FLOW COMPACT 27 HELIX - ULTRAFILTRATION MEMBRANE
• Article Code: 7821KRJ99R
• Description: 8-inch module with 8.0 mm hydraulic membrane diameter

Applications

• Effluent treatment
• Membrane bioreactor

Operating limits

• Max. feed pressure: 800 kPa
• Max. permeate pressure:
  • 650 kPa (at 20 - 60 °C)
  • 550 kPa (at 30 °C)
  • 450 kPa (at 40 °C)
  • 380 kPa (at 50 °C)
  • 300 kPa (at 60 °C)
• Max. transmembrane pressure: -60 ~ +250 kPa
• Max. temperature: 60 °C
• Temperature Change: To avoid mechanical damage, do not subject the membrane module or element to sudden temperature changes, particularly decreasings. Do not exceed 60 °C process temperature. Bring the module or element back to ambient operating temperature slowly (typical value 1 °C/min).

Mechanical / hydraulic

• Element Specifications:
  • Hydraulic membrane diameter: 8.0 mm
  • Membrane area: 27 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. 40 kg [88 lbs]
  • Membrane element filled with water: ca. 100 kg [220 lbs]
• Materials of Construction:
  • Housing: PVC-C, drinking water quality
  • Potting: EP resin
  • Membrane: Polyvinylidene fluoride
  • Membrane Carrier: Composite polyester woven/non-woven
• Process Characteristics (water, 20 °C):
  • Hydraulic membrane diameter: 8.0 mm
  • Crossflow flow rate: 67.9 x v [m³/h] (where v is superficial velocity in m/s)
  • Pressure-drop across module (turbulent flow): 3.5 x L0 x v^1.8 [kPa] (where L0 is module length in m)
• Connection Specifications: For connection specifications, check the corresponding connection configuration data sheet.

Membrane Characteristics

• Hydrophilic tubular polyvinylidene fluoride membrane cast on a polyester carrier
• The Helix structure of the membrane surface enhances turbulence and reduces membrane fouling
• Structure: Asymmetric
• Mean pore size: 30 nm
• Developed for use in large-scale processes for water purification
• High performance and very good anti-fouling behavior
• Membrane elements can be backflushed for efficient membrane cleaning, resulting in a higher average product flux

Chemical Resistance

• 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 (NaOCl):
    • Typical: 200 ppm, at ≤ 40 °C
    • Maximum: 500 ppm
    • Cumulative: 250,000 ppm hours at 30 °C
• Cleaning Chemical Resistance:
  • 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
• Cleaning Recommendations: It is recommended to keep the pH between 1 and 11 and not to exceed a temperature of 40 °C during cleaning and/or disinfection.

Storage

• New Membrane Modules: Store as supplied in a dry, normally ventilated place, away from sources of heat, ignition, and direct sunlight. Store between 0 and 40 °C. The membrane modules should not be subjected to any freezing temperatures.
• After Use: Ultrafiltration membranes need to be stored wet at all times.
• Biological Growth Prevention: To avoid biological growth during shutdowns or storage, wet membranes should be treated with a compatible biocide.
  • 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.
  • Long-term storage: Membranes should be cleaned before the disinfection step is carried out. For disinfection, a 1% sodium metabisulfite solution can be used.
• General Wet Storage: In either short or long-term situations, modules should be stored hydraulically filled.

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

Official datasheet (PDF)

PDF datasheet