X-Flow-Compact-33V-Helix

Summary

Product identification

The X-flow COMPACT 33V Helix is an 8-inch Ultrafiltration Membrane element designed for advanced filtration processes.

• Article Code: 7821KQB99S
• Membrane Type: Hydrophilic tubular polyvinylidene fluoride membrane cast on a polyester carrier.
• Membrane Structure: Asymmetric, with a Helix structure on the surface to enhance turbulence and reduce fouling.
• Mean Pore Size: 30 nm

Applications

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

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)
• Dry weight: ca. 45 kg [100 lbs]
• Weight when filled with water: ca. 110 kg [242 lbs]

Materials of Construction:

• Housing: PVC-C, drinking water quality
• Potting: EP resin
• Membrane:
  • Material composed of polyvinylidene fluoride
  • Carrier is a composite polyester woven/non woven

Hydraulic Process Characteristics (water, 20°C):

• Crossflow flow rate: 53.5 x v (where v is superficial velocity in m/s)
• Pressure-drop across module (laminar flow): 1.3 x L0 x v (where L0 is module length in m)
• Pressure-drop across module (turbulent flow): 3.9 x L0 x v^1.75^ (where L0 is module length in m)

Operating limits

• Max. feed pressure: 800 kPa
• Max. permeate pressure:
  • 650 kPa at 20 °C
  • 550 kPa at 30 °C
  • 450 kPa at 40 °C
  • 380 kPa at 50 °C
  • 300 kPa at 60 °C
• Max. transmembrane pressure: -100 ~ +250 kPa at 20-60 °C; -50 ~ +250 kPa at 40 °C (Note: Negative transmembrane pressure correlates with backwash pressure)
• Max. temperature: 60 °C

Cleaning chemical resistance

The resistance of the membrane to solvents is process-condition dependent. The following are guidelines:

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: ++

Cleaning Chemical Resistance:

• NaOCl (active chlorine): 500 ppm max.
  • Typical use: 200 ppm, at ≤ 40 °C
  • Maximum: 500 ppm
  • Cumulative: ≤ 250,000 ppm hours 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

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. To avoid mechanical damage, do not subject the membrane module or element to sudden temperature changes, particularly decreases. Do not exceed 40 °C process temperature. Bring the module or element back to ambient operating temperature slowly (typical value 3 °C/min).

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.
• Do not subject to freezing temperatures.

Used Membrane Modules (after use):

• UF membranes must 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. Contractual data should always match the OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet