CSM RE2540-BN

Summary

Product Identification

The RE 2540-BN is a normal-grade reverse osmosis (RO) element featuring a thick feed spacer, designed for brackish water applications.

• Membrane Type: Thin-Film Composite
• Membrane Material: Polyamide (PA)
• Element Configuration: Spiral-Wound, FRP Wrapping

Performance Specifications

The stated product performance is based on data taken after 30 minutes of operation under specific test conditions.

• Permeate Flow Rate: 600 GPD (2.3 m³/day)
• Stabilized Salt Rejection: 99.7%
• Minimum Salt Rejection: 99.4%
• Effective Membrane Area: 24 ft² (2.5 m²)

Test Conditions:

• NaCl Solution: 2,000 mg/L
• Applied Pressure: 225 psig (1.5 MPa)
• Recovery: 15%
• Temperature: 77 °F (25 °C)
• pH: 6.5 – 7.0

Note: Permeate flow rate for each element may vary but will be no more than 15%.

Operating Limits

• Max. Pressure Drop / Element: 15 psi (0.1 MPa)
• Max. Pressure Drop / 240” Vessel: 60 psi (0.41 MPa)
• Max. Operating Pressure: 600 psi (4.14 MPa)
• Max. Feed Flow Rate: 6 gpm (1.36 m³/hr)
• Min. Concentrate Flow Rate: 1 gpm (0.23 m³/hr)
• Max. Operating Temperature: 113 °F (45 °C)
• Operating pH Range: 2.0 – 11.0
• CIP pH Range: 1.0 – 13.0
• Max. Turbidity: 1.0 NTU
• Max. SDI (15 min): 5.0
• Max. Chlorine Concentration: < 0.1 mg/L

Design Guidelines for Various Water Sources

• Wastewater Conventional (SDI < 5): 8–12 gfd
• Wastewater Pretreated by UF/MF (SDI < 3): 10–14 gfd
• Seawater, Open Intake (SDI < 5): 7–10 gfd
• Seawater, Beach Well (SDI < 3): 8–12 gfd
• Surface Water (SDI < 5): 12–16 gfd
• Surface Water (SDI < 3): 13–17 gfd
• Well Water (SDI < 3): 13–17 gfd
• RO Permeate (SDI < 1): 21–30 gfd

Saturation Limits (Using Antiscalants)

• Langlier Saturation Index (LSI): < +1.5
• Stiff and Davis Saturation Index (SDSI): < +0.5
• CaSO₄: 230% saturation
• SrSO₄: 800% saturation
• BaSO₄: 6,000% saturation
• SiO₂: 100% saturation

Mechanical / Hydraulic

The RE 2540-BN element fits nominal 2.5 inch (64 mm) I.D. pressure vessels. Each membrane element is supplied with one brine seal, one interconnector (coupler), and four o-rings.

Note: Dimensions C, D, and E appear to relate to the element's internal/endcap configurations. See the official PDF for exact tabulated values and diagrams.

General Handling Procedures

• Elements should be stored dry at room temperature (7–32 °C; 40–95 °F) and out of direct sunlight.
• If the polyethylene bag is damaged, add a new sodium bisulfite preservative solution and seal tightly to prevent drying and biological growth.
• The permeate from the first hour of operation should be discarded to flush out the preservative solution.
• Elements must be kept moist after initial wetting.
• During storage, shipping, and system shutdowns, immerse elements in a preservative solution (e.g., 1% by weight sodium bisulfite or food-grade sodium metabisulfite) to prevent biological growth and freezing. For short-term storage (one week or less), 1% by weight sodium metabisulfite solution is sufficient.
• Avoid excessive pressure and flow spikes.
• Only use chemicals compatible with the membrane elements and components; incompatible chemicals may void the warranty.
• Permeate pressure must always be equal to or less than the feed/concentrate pressure; damage from permeate back pressure voids the warranty.

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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. For contractual data, always refer to the specific OEM PDF revision used on your project.

Official datasheet (PDF)

PDF datasheet