X-Flow-Compact-27G-Helix

Summary

Product identification

• Product Name: X-Flow Compact 27G Helix
• Type: Ultrafiltration Membrane
• Article Code: 7781KRC99R

Applications

• Effluent treatment
• Membrane bioreactor
• Large-scale processes for water purification

Operating limits

• Max. feed pressure: 1250 kPa
• Max. permeate pressure: 1250 kPa
• Feed-permeate differential pressure: -20 ~ +250 kPa (at 20 - 60 °C)
• Max. process temperature: 60 °C (do not exceed 70 °C)
• Max. temperature change rate (decreasing): 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: 250 mm
  • Module diameter D2: 206.6 mm
  • Permeate connection d0: 73.0 mm
  • Permeate length I0: 40 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: Glass fibre reinforced epoxy, drinking water quality
  • Potting: EP resin
  • Membrane: Polyvinylidene fluoride (PVDF), on a polyester woven/non-woven carrier
• Process Characteristics (water, 20°C):
  • Hydraulic membrane diameter: 8.0 mm
  • Crossflow flow rate (*): 67.9 x v m³/h
  • Pressure-drop across module (laminar flow) (**): 0.53 x L0 x v kPa
  • Pressure-drop across module (turbulent flow) (**): 2.3 x L0 x v¹·⁷⁵ kPa
  • (*) superficial velocity (v) in m/s
  • (**) module length (L0) in m

Membrane characteristics

• Hydrophilic tubular polyvinylidene fluoride membrane cast on a polyester carrier
• Helix structure enhances turbulence and reduces membrane fouling
• Structure asymmetric
• Mean pore size: 30 nm
• High performance and very good anti-fouling behaviour
• Membrane elements can be backflushed for efficient membrane cleaning, resulting in higher average product flux.

Cleaning chemical resistance

• General Solvent Resistance (guidelines; resistance depends on actual process conditions):
  • Acids, pH >2: +
  • Bases, pH <11: +
  • Organic esters, ketones, ethers: --
  • Aliphatic alcohols: ++
  • Aliphatic hydrocarbons: ++
  • Halogenated hydrocarbons: ++
  • Aromatic hydrocarbons: +
  • Polar organic solvents: --
  • Oils: ++
• Recommended Cleaning Agents:
  • NaOCl (active chlorine): 500 ppm max.
    • Sodium Hypochlorite: Typical 200 ppm, at ≤ 40 °C; Maximum 500 ppm; 250,000 ppm hours cumulative at 30 °C
  • H₂O₂: 1000 ppm max.
  • NaOH: pH ≤ 11
  • Nitric acid: pH ≥ 1
  • Phosphoric acid: pH ≥ 1
  • EDTA: pH ≤ 11
  • Citric acid
  • Enzymatic compounds
• Cleaning and Disinfection Parameters:
  • Keep pH between 1 and 11
  • Do not exceed a temperature of 40 °C

Storage

• New membrane modules should be stored as supplied in a dry, normally ventilated place, away from heat, ignition, and direct sunlight.
• Store between 0 and 40 °C.
• Membrane modules should not be subjected to 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 long-term storage, membranes should be cleaned before disinfection. A 1% sodium metabisulfite solution can be used for disinfection.
• In either situation (short or long-term), 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. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet