3838 HFK-328

Summary

Product identification

HFK-328 FOOD & DAIRY UF ELEMENTS are Ultrafiltration 4”, 6” and 8” Spiral Element Series.

• Membrane Chemistry: Proprietary semi-permeable polyethersulfone (PES)
• Membrane Type: HFK-328 with observed separation range of 5,000 Daltons
• Construction: Sanitary spiral wound element with net outer wrap
• Regulatory Status:
  • Compliant with US FDA CFR Title 21
  • Compliant with EC Reg. No. 1935/2004
  • Compliant with EU Reg. No. 10/2011
  • Halal-certified by the Islamic Food and Nutrition Council of America (IFANCA)
• Options:
  • Diameter: 3.8”, 4.3”, 6.3”, 6.4”, 7.8, 8.0”, or 8.3”
  • Length: 33”, 35.5”, or 38”
  • Feed Spacer: N (31 mil), V (46 mil), H (62 mil), or F (80 mil)
  • Outer wrap: Controlled (e.g. NYV) or trimmable (e.g. NYT)

Specifications

The elements consist of a semipermeable polyethersulfone (PES) layer on a polyester backing material.

• Not all combinations are available.
• 6438 and 788 elements are only available in controlled configuration.
• 6338 elements are only available in trimmable configuration.

Operating limits

• Typical Operating Pressure: 30 - 120 psi (2.1 - 8.3 bar)
• Maximum Operating Pressure: 140 psi (9.7 bar)
• Operating Temperature Range: 41 - 131°F (5 - 55°C)
• Cleaning Temperature Range: 105 - 122°F (40 - 50°C)
• Allowable pH - Continuous Operation: 2.0 - 10.0
• Allowable pH - Clean-In-Place (CIP): 1.8 - 11.0
• Permeate Pressure: Should not exceed baseline (concentrate) pressure at any time (including on-line, off-line and during transition). Reverse pressure will damage the membrane.
• Pure water flux: 1.0-2.2 gfd/psi (24-53 l/m²/h/bar) at 77°F (25°C).

Pressure Drop

• Design Pressure Drop Per Element:
  • N spacer: 12-15 psi (0.8-1.0 bar)
  • V spacer: 15-20 psi (1.0-1.4 bar)
  • H or F spacer: 15-25 psi (1.0-1.7 bar)
• Design Pressure Drop Per Vessel (3 in series):
  • N spacer: 36-45 psi (2.5-3.1 bar)
  • V spacer: 45-60 psi (3.1-4.1 bar)
  • H or F spacer: 45-75 psi (3.1-5.2 bar)
• Design Pressure Drop Per Vessel (4 in series):
  • N spacer: 48-60 psi (3.3-4.1 bar)
  • V spacer: 60-68 psi (4.1-4.7 bar)

Feed water

Water Quality for Cleaning & Diafiltration

• Turbidity: Maximum feed turbidity is 1 NTU.
• SDI: Maximum feed SDI is 5.0 (15-minute test).

Chemical handling

• Chlorine Exposure:
  • Recommended chlorine exposure time: 30 minutes per day.
  • Residual chlorine concentration during cleaning cycle (CIP): 150 ppm @ pH 10.5 or higher.
  • Chlorine concentration should never exceed 200 ppm.
  • Chlorine should only be added to the cleaning solution after the pH has been adjusted to 10.5 or higher.
  • Iron or other catalyzing metals in the presence of free chlorine or hydrogen peroxide will accelerate membrane degradation.
• Cationic Polymers and Surfactants: HFK-328 membranes may be irreversibly fouled if exposed to cationic (positively charged) polymers or surfactants. Exposure to these chemicals during operation or cleaning is not recommended and will void the warranty.
• Lubricants: For element installation, use only water or glycerin to lubricate seals. The use of petroleum or vegetable-based oils or solvents may damage the element and will void the warranty.

Mechanical / hydraulic

Nominal Dimensions

• Not all combinations are available.

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Disclaimer: This summary is based solely on the provided text extract. The original OEM PDF datasheet may contain additional figures, footnotes, or more recent revisions. Contractual data for any project must match the specific OEM PDF revision used on that project.

Official datasheet (PDF)

PDF datasheet