SelRO 3838 MPS-36-VYV

Summary

Product identification

The SelRO™ NF SANITARY SPIRAL ELEMENT is a 4” acid and caustic stable nanofiltration spiral wound element.

• Membrane Chemistry: Proprietary composite nanofiltration membrane
• Membrane Type: MPS-36 pH stable nanofiltration membrane
• Molecular weight cut-off: 1,000 Daltons
• Construction: Sanitary spiral wound with net outerwrap
• Regulatory status: Compliant with US FDA CFR Title 21
• Permeate tube: Polysulfone
• Applications: Product concentration and purification
• Feed Spacer: 46 mil (1.2 mm)

Nominal Performance

Test conditions: RO water at 440 psi (30 bar), 86°F (30°C), 15% recovery, pH 7.5. Feed solution for rejection tests is 3% glucose / 3% sucrose or 5% NaCl. Rejection rates to sugars may vary and are given as indicative performance only.

• Part Number: 0770250
• Model: 3838 MPS-36-VYV
• Rejection:
  • Glucose / Sucrose: 30 / 50
  • NaCl: 10
• Permeate Flow: 7,100 gpd (26.9 m³/d)
• Active Membrane Area: 60 ft² (5.6 m²)

Operating limits

• Typical Operating Pressure: 145 - 510 psi (10 - 35 bar)
• Maximum Operating Pressure: 510 psi (35 bar)
• Operating Temperature Range: 40 - 158°F (5 - 70°C)
• Maximum Operating Temperature: 158°F (70°C)
• Cleaning Temperature Range: 95 - 158°F (35 - 70°C)
• Allowable pH - Continuous Operation: 1 - 13
• Allowable pH - Clean-In-Place (CIP): 1 - 13
• Design Pressure Drop Per Element: 6 - 10 psi (0.4 - 0.7 bar)
• Maximum Differential Pressure Per Single Element: 10 psi (0.7 bar) per housing
• Design Pressure Drop Per Vessel: 30 - 50 psi (2.1 - 3.4 bar)
• Maximum Differential Pressure Per Housing (any length): 50 psi (3.4 bar)
• Maximum Allowed Permeate Pressure: 3 psi (0.2 bar)
• Maximum Feed Flow Rate: 17 gpm (65 Liter per minute)

For specific applications, consult KMS Process Technology Group. Refer to the Operating Envelope for Code 30 Membranes Section when temperature is higher than 122°F (50°C). The operating envelope defines specific pressure-temperature relationships to prevent irreversible compaction and performance deterioration:

• 510 psi (35 bar) at 122°F (50°C)
• 360 psi (25 bar) at 140°F (60°C)
• 220 psi (15 bar) at 158°F (70°C) See the official PDF for the pressure-temperature diagram.

Feed water

• Maximum Feed Turbidity: 1 NTU
• Maximum Feed Silt Density Index (SDI): 5.0 (15-minute test)
• Chlorine and Chemical Exposure:
  • Not recommended to expose the MPS-36 membrane to chlorine or other oxidants, as it may affect membrane performance.
  • Sodium metabisulfite (without catalysts such as cobalt) is the preferred chemical to eliminate free chlorine or similar oxidizers in the feed.
  • Not recommended to expose the membrane to organic solvents, such as alcohol, acetone, etc.

Mechanical / hydraulic

• Model: 3838 MPS-36-VYV
  • A: 38.0 inches (965 mm)
  • B: 3.8 inches (96 mm)
  • C: 0.831 inches (21.1 mm)

Cleaning / Preservation

• Recommended Cleaning Materials:
  • 0.1-5% w/w sodium hydroxide
  • 0.2-1% w/w nitric or phosphoric acid
  • 0.1-0.5% w/w detergent mix KOCHKLEEN™ KLD-III
  • 0.5% Anionic surfactant (such as SDS)
• Preservation:
  • Short Term (up to two weeks): 0.25 w/w Sodium metabisulfite
  • Long Term: 0.7% w/w Benzalkonium chloride
  • Concentrated glycerin should not be used to preserve the MPS-36 membrane.

Storage

• The membrane should not be permitted to get dry.
• It should be stored in a sealed bag, in temperature ranging from 25°F - 86°F (-4°C - 30°C).

Lubricants

• For element installation, use only water or glycerin to lubricate seals.
• The use of petroleum or vegetable-based oils or solvents may cause damage and will void any warranty.

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

Official datasheet (PDF)

PDF datasheet