X-Flow-Compact-33G-Helix

Summary

Product identification

The X-FLOW COMPACT 33G HELIX is an ultrafiltration membrane element. It features a hydrophilic tubular polyvinylidene fluoride membrane cast on a polyester carrier. The Helix structure on the membrane surface enhances turbulence and reduces fouling. This product is identified by ARTICLE CODE: 7781KQB99R.

Membrane Characteristics

• Membrane Type: Hydrophilic tubular polyvinylidene fluoride membrane cast on a polyester carrier.
• Structure: Asymmetric, Helix structure for enhanced turbulence and reduced fouling.
• Mean Pore Size: 30 nm
• Application Focus: Developed for large-scale processes in water purification.
• Performance: High performance with very good anti-fouling behavior.
• Cleaning: Membrane elements can be backflushed for efficient cleaning, resulting in a higher average product flux.
  • Backwash water should be free of particulates and of permeate quality or better.
  • Backwash pumps should preferably be made of non-corroding materials (e.g., plastic or stainless steel).
  • If compressed air is used, do not allow a two-phase air/water mixture to enter the element.
• Temperature Sensitivity: Avoid sudden temperature changes (especially decreasing). Do not exceed 70 °C process temperature. Bring the module or element back to ambient operating temperature slowly (typical value 3 °C/min) to avoid irreparable damage.

Applications

• Pre-treatment for RO and NF systems
• Surface water treatment
• Drinking and process water production
• Recovery of sand filter backwash water
• Effluent treatment
• Membrane bioreactors
• Wastewater treatment
• Treatment of oil-in-water emulsions

Operating limits

• Max. feed pressure: 1250 kPa (at 20-60 °C)
• Max. permeate pressure: 1250 kPa (at 20-60 °C)
• Max. transmembrane pressure:
  • -100 ~ +250 kPa (at 40 °C)
  • -50 ~ +250 kPa (at 60 °C) (Note: negative TMP correlates with backwash pressure)
• Max. temperature: 60 °C (process temperature should not exceed 70 °C)
• Recommended cleaning pH: 1 to 11
• Max. temperature during cleaning/disinfection: 40 °C

Mechanical / hydraulic

• Hydraulic membrane diameter: 5.2 mm
• Dimensions:
  • Membrane area: 33 m²
  • Feed connection D0: 220.0 mm
  • Module length L0: 3000 mm (±1)
  • Saddle diameter D1: 250 mm
  • Module diameter D2: 208 mm
  • Permeate connection d0: 73.0 mm
  • Permeate length I0: 165 mm (±1)
  • Permeate position I1: 90 mm (±1) For connection specifications, please check the corresponding connection configuration data sheet.
• Weight:
  • Dry weight of membrane element: ca. 45 kg [100 lbs]
  • Membrane element filled with water: ca. 110 kg [242 lbs]
• Materials of Construction:
  • Housing: Glass fibre reinforced epoxy, drinking water quality
  • Potting: EP resin
• Process Characteristics (water, 20 °C):
  • Crossflow flow rate: 53.5 x v m³/h (where v is superficial velocity in m/s)
  • Pressure-drop across module (laminar flow): 1.3 x L0 x v kPa (where L0 is module length in m, v is superficial velocity in m/s)
  • Pressure-drop across module (turbulent flow): 3.9 x L0 x v^1.75 kPa (where L0 is module length in m, v is superficial velocity in m/s)

Cleaning Chemical Resistance

The following cleaning agents can be used depending on the feed solution. 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.

• 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

General Solvent Resistance

The resistance of the membrane to solvents strongly depends on the actual process conditions; the indications below should only be considered as a guideline.

• Acids, pH >2: +
• Bases, pH <11: +
• Organic esters, ketones, ethers: --
• Aliphatic alcohols: ++
• Aliphatic hydrocarbons: ++
• Halogenated hydrocarbons: ++
• Aromatic hydrocarbons: +
• Polar organic solvents: --
• Oils: ++

Storage

• New membrane modules: Store as supplied, in a dry, normally ventilated place, away from heat, ignition sources, and direct sunlight. Store between 0 and 40 °C. Do not subject to freezing temperatures.
• Used membranes: Must be stored wet at all times.
• Biological Growth Control:
  • 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.
  • Modules should be stored hydraulically filled in either situation.

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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