Dairy-UF 3838 HFK-131

Summary

Product identification

• Product Line: HFK-131 FOOD & DAIRY UF ELEMENTS
• Membrane Chemistry: Proprietary semi-permeable polyethersulfone (PES) layer on a polyester backing material.
• Membrane Type: HFK-131 with observed separation range of 10,000 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), F (80 mil), D (100 mil)
  • Outer wrap: Controlled (e.g. NYV) or trimmable (e.g. NYT)
• Active Membrane Area: Varies by model and feed spacer. See the official PDF for exact tabulated values.
• Membrane Characteristics:
  • Pure water flux: 1.0-2.2 gfd/psi (24-53 l/m²/h/bar) at 77°F (25°C).

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. Reverse pressure will damage the membrane.

Feed water

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

Mechanical / hydraulic

• 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)
• Nominal Dimensions: Elements are available in various lengths (A) and diameters (B), with a specific core tube diameter (C). See the official PDF for exact tabulated values for each model.

Other Considerations

• Chlorine and Chemical Exposure:
  • Recommended chlorine exposure time during cleaning: 30 minutes per day.
  • Residual chlorine concentration during CIP: 150 ppm @ pH 10.5 or higher.
  • Chlorine concentration should never exceed 200 ppm.
  • Chlorine should only be added to cleaning solution after 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.
  • Exposure to cationic (positively charged) polymers or surfactants during operation or cleaning is not recommended and will void the warranty due to potential irreversible fouling.
• Lubricants: For element installation, use only water or glycerin to lubricate seals. Petroleum or vegetable-based oils or solvents may damage the element and will void the warranty.

Disclaimer: This summary is based on the provided text extraction 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