KMS 3838 HRX-NYV

Summary

Product identification

• Membrane Chemistry: Proprietary TFC® polyamide
• Membrane Type: HRX - high rejection reverse osmosis
• Construction: Sanitary spiral wound elements with net outerwrap
• Regulatory Status: Compliant with US FDA CFR Title 21, EC Reg. No. 1935/2004, and EU Reg. No. 10/2011. Halal-certified by the Islamic Food and Nutrition Council of America (IFANCA).
• Applications: Concentration of UF permeate/lactose, juices. Polishing of RO permeate and evaporator condensate. Polishing of water for reuse.
• Options:
  • Diameter: 3.8”, 7.8” or 8.0”
  • Length: 38” or 39”
  • Feed Spacer: N (31 mil) or V (46 mil)
  • Outerwrap: Controlled (e.g. NYV) or trimmable (e.g. NYT)

Nominal Performance

Operating limits

• Membrane Characteristics: HRX reverse osmosis elements are selected when high rejection to organic and inorganic material is the objective.
• Typical Operating Pressure: 300 - 600 psi (20.7 – 41.4 bar)
• Maximum Operating Pressure: 650 psi (44.8 bar)
• Operating Temperature Range: 40 - 122°F (5 - 50°C)
• Maximum Cleaning Temperature: 122°F (50°C)
• Allowable pH - Continuous Operation: 4.0 - 10.0
• Allowable pH - Continuous Operation (below 77°F/25°C): 2.5 - 10.0
• Allowable pH - Clean-In-Place (CIP): 1.8 - 11.0
• Permeate Pressure: Should not exceed baseline (concentrate) pressure at any time (including online, off-line and during transition). Reverse pressure will damage the element.
• Design Pressure Drop Per Element: 6 - 10 psi (0.4 - 0.7 bar)
• Maximum Differential Pressure Per Element: 10 psi (0.7 bar)
• Design Pressure Drop Per Vessel: 30 - 50 psi (2.1 - 3.4 bar)
• Maximum Differential Pressure Per Pressure Vessel: 50 psi (3.4 bar)
• Water Quality for Cleaning & Diafiltration:
  • Turbidity: Maximum feed turbidity is 1 NTU.
  • Silt Density Index (SDI): Maximum feed SDI is 5.0 (15-minute test).
• Chlorine and Chemical Exposure:
  • KMS recommends removing residual free chlorine prior to membrane exposure to prevent premature membrane failure.
  • Sodium metabisulfite (without catalysts such as cobalt) is the preferred chemical to eliminate free chlorine or similar oxidizers in the feed.
  • HRX 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.

Nominal Dimensions

Supplemental Technical Bulletins

• RO/NF Element Cleaning Procedures
• Water Quality Guidelines for CIP and Diafiltration

Disclaimer: This summary is based on the provided text extract. It may not include all figures, footnotes, or the latest revisions present in the official PDF datasheet. For contractual data and complete information, always refer to the specific OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet