CSM RE2540-SHN

Summary

Product identification

The RE 2540-SHN is a high rejection reverse osmosis (RO) element designed for seawater and high salinity well 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 at the following test conditions:

• 32,000 mg/L NaCl solution

• 800 psig (5.5 MPa) applied pressure

• 8% recovery

• 77 °F (25 °C)

• pH 6.5–7.0

• Permeate flow rate: 500 GPD (1.9 m³/day)

• Stabilized salt rejection: 99.75%

• Minimum salt rejection: 99.6%

• Effective membrane area: 24 ft² (2.2 m²)

• Permeate flow rate variation: No more than 20% for each element

Operating limits

• Max. Pressure Drop / Element: 15 psi (0.1 MPa)
• Max. Pressure Drop / 240” Vessel: 60 psi (0.41 MPa)
• Max. Operating Pressure: 1,200 psi (8.27 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

Feed water

Design Guidelines (Flux in gfd)

• 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

• Model Name: RE 2540-SHN
• Overall Length (A): 40.0 inch (1,016 mm)
• Diameter (B): 2.5 inch (64 mm)
• Permeate Tube Diameter (C): 0.75 inch (19.1 mm)
• Adapter Length (D): 1.1 inch (28 mm)
• Adapter Diameter (E): 1.1 inch (28 mm)
• Part Number: 40000305
• Inter-connector Part Number: 40000223
• Each membrane element is supplied with one brine seal, one interconnector (coupler), and four o-rings.
• All RE2540 elements fit nominal 2.5 inch (64 mm) I.D. pressure vessels.

General Handling Procedures

• Elements in boxes must be kept dry at room temperature (7–32°C; 40–95°F) and not stored in direct sunlight.
• If the polyethylene bag is damaged, a new preservative solution (sodium bisulfite) must be added, and the bag sealed air-tight to prevent drying and biological growth.
• Permeate from the first hour of operation should be discarded to flush out the preservative solution.
• Elements should be immersed in a preservative solution during storage, shipping, and system shutdowns to prevent biological growth and freezing.
• The standard storage solution contains 1% by weight sodium bisulfite or sodium metabisulfite (food grade).
• For short-term storage (one week or less), 1% by weight sodium metabisulfite solution is adequate for preventing biological growth.
• Keep elements moist at all times after initial wetting.
• Avoid excessive pressure and flow spikes.
• Only use chemicals compatible with the membrane elements and components.
• Permeate pressure must always be equal to or less than the feed/concentrate pressure.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions found in the official PDF. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet