CSM NE8040-70

Summary

Product identification

This is a normal grade Nanofiltration (NF) element with medium monovalent ion rejection.

• Membrane type: Thin-Film Composite
• Membrane material: Polyamide (PA)
• Element configuration: Spiral-Wound, FRP Wrapping

Specifications

• Permeate flow rate¹: 7,000 GPD (26.5 m³/day)
• Monovalent ion rejection (NaCl)¹: 40.0 – 70.0%
• Divalent ion rejection (CaCl₂) ²: 45.0 – 70.0%
• MgSO₄ rejection³: 97.0%
• Effective membrane area: 400 ft² (37.2 m²)

Test Conditions for Performance¹:

• 2,000 mg/L NaCl solution
• 75 psig (0.5 MPa) applied pressure
• 15% recovery
• 77 °F (25 °C)
• pH 6.5 – 7.0

Test Conditions for Performance²:

• 500 mg/L CaCl₂ solution
• 75 psig (0.5 MPa) applied pressure
• 15% 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. Each membrane element is supplied with one brine seal, one interconnector (coupler), and four o-rings.

Mechanical / hydraulic

• Model Name: NE8040-70
• Dimensions:
  • A: 40.0 inch (1,016 mm)
  • B: 8.0 inch (201 mm)
  • C: 1.12 inch (28 mm)
• Weight: 15 kg
• All NE8040 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: 600 psi (4.14 MPa)
• Max. Feed Flow Rate: 75 gpm (16.0 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 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

General Handling Procedures

• Elements 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.
• Permeate from the first hour of operation should be discarded.
• Elements should be immersed in a preservative solution (e.g., 1% by weight sodium bisulfite or sodium metabisulfite) during storage, shipping, and system shutdowns.
• 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 to avoid damage.

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Disclaimer: This summary is based on the provided text extraction, which may omit figures, footnotes, or the latest revisions from the original OEM PDF. For contractual data and complete specifications, the OEM PDF revision used on the project must be consulted.

Official datasheet (PDF)

PDF datasheet