CSM RE8040-SHN400

Summary

Product identification

The CSM RE8040-SHN 400 is a high rejection reverse osmosis (RO) element with an extended area, designed for seawater and high salinity well water applications.

Specifications

• Permeate flow rate: 6,500 GPD (24.6 m³/day)
• Nominal salt rejection: 99.75%
• Effective membrane area: 400 ft² (37.2 m²)
• Minimum salt rejection: 99.6%
• Boron rejection: 92.0% (at pH 8.0 and 5 mg/L boron feed, under specified test conditions)
• Permeate flow rate for each element may vary but will be no more than 15%.
• Membrane type: Thin-Film Composite
• Membrane material: Polyamide (PA)
• Element configuration: Spiral-Wound, FRP Wrapping

Test Conditions for Stated Performance: 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

Packaging: All elements are vacuum sealed in a polyethylene bag containing 1.0% SBS (sodium bisulfite) solution and individually packaged in a cardboard box.

Dimensions

• A: 40.0 inch (1,016 mm)
• B: 8.0 inch (201 mm)
• C: 1.12 inch (28 mm)

Each membrane element is supplied with one brine seal, one interconnector (coupler), and four o-rings. All RE8040 elements fit nominal 8.0 inch (201 mm) I.D. pressure vessels.

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: 75 gpm (17.0 m³/hr)
• Min. Concentrate Flow Rate: 16 gpm (3.6 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

Flux (gfd) 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

The above saturation limits are typically accepted by proprietary antiscalant manufacturers. It is the user’s responsibility to ensure proper chemical(s) and concentration are dosed ahead of the membrane system to prevent scale formation anywhere within the membrane system. Membrane elements fouled or damaged due to scale formation are not covered by the limited warranty.

General Handling Procedures

• Elements in boxes must be kept dry at room temperature (7 – 32 °C; 40 – 95 °F) and should not be stored in direct sunlight.
• If the polyethylene bag is damaged, a new preservative solution (sodium bisulfite) must be added and air-tight sealed 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 (i.e., 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. Use of such chemicals may void the element limited warranty.
• Permeate pressure must always be equal to or less than the feed/concentrate pressure. Damage caused by permeate back pressure voids the element limited warranty.

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

Official datasheet (PDF)

PDF datasheet