CSM RE2540-BLN

Summary

Product Identification

The CSM RE2540-BLN is a low-pressure grade reverse osmosis (RO) element designed for brackish water applications. It features low-energy consumption.

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

Performance Specifications (Test Conditions)

Performance is rated under the following conditions:

• NaCl solution: 1,500 mg/L
• Applied pressure: 150 psig (1.03 MPa)
• Recovery: 15%
• Temperature: 77°F (25°C)
• pH: 6.5–7.0
• Permeate flow rate variability: ±25% for each element

Under these conditions:

• Permeate Flow Rate: 930 GPD (3.5 m³/day)
• Nominal Salt Rejection: 99.2% (Minimum 99.0%)
• Effective Membrane Area: 27 ft² (2.5 m²)

Operating Limits

• Max. Pressure Drop / Element: 15 psi (0.10 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

Mechanical / Hydraulic

The element shell is Fiber Reinforced Plastic (FRP).

• Model Name: RE2540-BLN
  • A: 40.0 inch (1,016 mm)
  • B: 2.4 inch (60.8 mm)
  • C: 0.75 inch (19.1 mm)
  • D/E: 1.05 inch (26.7 mm)
• Inter-Connector Part Number: SWA01050
• Brine Seal Part Number: SWA01047

Notes:

• Each membrane element is supplied with one interconnector (coupler) and four O-rings.
• All RE2540 elements fit nominal 2.5 inch (63.5 mm) I.D. pressure vessels.

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.
• For WET-TYPE elements, a preservative solution (1% sodium metabisulfite solution) is added to inhibit microbial growth.
• Permeate from the first hour of operation should be discarded.
• Stabilized salt rejection is generally achieved within 1–48 hours of continuous use.
• 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 incompatible 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.
• Be aware of glass fiber strands from the FRP shell and use safety equipment.

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. Contractual data must always match the OEM PDF revision used for the specific project.

Official datasheet (PDF)

PDF datasheet