Dairy-Pro 3838 RO - 30

Summary

Product identification

• Product Name: Dairy-Pro® RO ELEMENTS
• Series: Reverse Osmosis Sanitary Spiral Element Series
• Membrane Chemistry: Proprietary TFC® polyamide
• Membrane Type: RO - high rejection reverse osmosis
• Construction: Sanitary spiral wound elements with controlled OD net Outerwrap with two BAND-TITE® reinforcement straps
• 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 whey, skim or whole milk, UF permeate/lactose.
  • 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: 30 mil or 45 mil

Nominal Specifications

• 3838 RO - 30 (Part 8383840): Membrane Area 76 ft² (7.1 m²), Feed Spacer 30 mil (0.8 mm)
• 3839 RO - 30 (Part 8383940): Membrane Area 76 ft² (7.1 m²), Feed Spacer 30 mil (0.8 mm)
• 3838 RO - 45 (Part 8383841): Membrane Area 61 ft² (5.7 m²), Feed Spacer 45 mil (1.1 mm)
• 3839 RO - 45 (Part 8383941): Membrane Area 61 ft² (5.7 m²), Feed Spacer 45 mil (1.1 mm)
• 7838 RO - 30 (Part 8783840): Membrane Area 350 ft² (32.5 m²), Feed Spacer 30 mil (0.8 mm)
• 8038 RO - 30 (Part 8803840): Membrane Area 371 ft² (34.5 m²), Feed Spacer 30 mil (0.8 mm)
• 8038 RO - 45 (Part 8803841): Membrane Area 291 ft² (27.0 m²), Feed Spacer 45 mil (1.1 mm)

Operating limits

• Typical Operating Pressure: 300 - 600 psi (20.7 - 41.4 bar)
• Maximum Operating Pressure: 800 psi (55 bar)
  • When operating above 650 psi (45 bar), temperature should not exceed 95°F (36°C).
• Operating Temperature Range: 40 - 122°F (5 - 50°C)
• Maximum Cleaning Temperature: 140°F (60°C)
• Allowable pH - Continuous Operation: 4.0 - 10.0
• Allowable pH - Clean-In-Place (CIP): 1.8 - 11.0
• 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)
• Permeate Pressure: Should not exceed baseline (concentrate) pressure at any time (including online, off-line and during transition). Reverse pressure will damage the element.

Feed water

• Turbidity: Maximum 1 NTU
• Silt Density Index (SDI): Maximum 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.
  • Iron or other catalyzing metals in the presence of oxidizers such as hydrogen peroxide or peracetic acid are known to accelerate membrane degradation.
• Cationic Polymers and Surfactants: Dairy-Pro RO 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 Installation: 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.

Product water

• Dairy-Pro® RO reverse osmosis elements are selected when high rejection to organic and inorganic material is the objective.

Mechanical / hydraulic

Nominal Dimensions

• 3838: Length 38.0 inches (965 mm), Diameter 3.8 inches (96 mm), Center tube 0.831 inches (21.1 mm)
• 3839: Length 38.8 inches (984 mm), Diameter 3.8 inches (96 mm), Center tube 0.831 inches (21.1 mm)
• 7838: Length 38.0 inches (965 mm), Diameter 7.7 inches (197 mm), Center tube 1.125 inches (28.6 mm)
• 8038: Length 38.0 inches (965 mm), Diameter 7.9 inches (201 mm), Center tube 1.125 inches (28.6 mm)

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Disclaimer: This summary is based on the provided text extract. It may not include all figures, footnotes, or the latest revisions from the complete OEM PDF datasheet. Contractual data for any project must match the specific OEM PDF revision used on that project.

Official datasheet (PDF)

PDF datasheet