SelRO MPS-34 2540 A2X

Summary

Product identification

The SelRO® MPS-34 is a pH stable nanofiltration membrane series.

• Membrane Chemistry: Proprietary composite nanofiltration membrane
• Membrane Type: pH stable nanofiltration membrane
• Molecular Weight Cut-Off (MWCO): 200 Dalton
• Construction: Spiral wound element
• Major Applications: Acid and caustic recovery, product concentration
• Permeate Tube Material: CPVC
• Options: Feed channel spacers: 30 mil (X) and 57 mil (Z)

Specifications Test Conditions: RO water at 440 psi (30 bar), 86°F (30°C). Feed solution for rejection tests is 3% glucose / 3% sucrose or 5% NaCl.

Operating limits

• Typical Operating Pressure: 220-510 psi (15-35 bar)
• Maximum Operating Pressure: 510 psi (35 bar)
• Maximum Temperature: 122°F (50°C) for A2 elements (CPVC permeate tube). Max 158°F (70°C) for B2 elements (stainless steel permeate tube).
• Allowable pH - Continuous Operation: 0-14
• Allowable pH - Clean-In-Place (CIP): 0-14
• Maximum Pressure Drop Per Element: 10 psi (0.7 bar)
• Maximum Pressure Drop Per Vessel (5 in Series): 50 psi (3.5 bar)
• Maximum Permeate Pressure: 3 psi (0.2 bar)
• Feed Flow Rates:
  • 2540 Minimum: 2 gpm (7.5 liter/min)
  • 2540 Maximum: 5 gpm (19 liter/min)
  • 4040 Minimum: 6 gpm (22 liter/min)
  • 4040 Maximum: 17 gpm (65 liter/min)

Feed water

• Turbidity: Maximum feed turbidity is 1 NTU.
• Chlorine and Chemical Exposure:
  • Not recommended to expose the membrane to chlorine or other oxidants.
  • Sodium metabisulfite (without catalysts) is the preferred chemical to eliminate free chlorine or other oxidizers.
  • Not recommended to expose the membrane to organic solvents (e.g., alcohol, acetone).

Mechanical / hydraulic

Nominal Dimensions

Cleaning and Storage

Typical Process Streams / Compatible Cleaning Chemicals

• 5% HCl, 37% HCl
• 15% H₂SO₄
• 15% Acetic acid
• 5% HNO₃
• 20% H₃PO₄
• 3% NaOH, 20% NaOH
• 10% KOH

Recommended Cleaning Materials

• 0.1-5% w/w sodium hydroxide at 122°F (50°C)
• 0.2-1% w/w nitric or phosphoric acid at 122°F (50°C)
• 0.1-0.5% w/w detergent mix KOCHKLEEN® KLD-III
• 0.5% anionic surfactant (such as SDS) at 122°F (50°C)

Lubricants

• Use only water or glycerin for lubricating seals during element installation.
• Avoid petroleum or vegetable-based oils or solvents.

Storage Solution

• Short Term (up to two weeks): 0.25% w/w sodium metabisulfite.
• Long Term: 0.7% w/w benzalkonium chloride.
• Glycerin should not be used for storage.
• The membrane module should not get dry; store in a sealed bag within a temperature range of 36°F - 86°F (2°C - 30°C).

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original PDF datasheet. For contractual purposes, refer to the specific OEM PDF revision used on your project.

Official datasheet (PDF)

PDF datasheet