CSM RE4021-BLR

Summary

Product identification

• Model: RE4021-BLR
• Description: Low pressure grade RO element for brackish water
• Key Features:
  • Low-Energy Consumption
  • High Permeate Flow and High Rejection
• Applications: Industrial, Municipal, Semiconductor
• Membrane Type: Thin-Film Composite
• Membrane Material: Polyamide (PA)
• Element Configuration: Spiral-Wound, FRP Wrapping

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. Operating Temperature: 113°F (45°C)
• Operating pH Range: 2.0 – 11.0
• CIP pH Range: 1.0 – 13.0

Performance

Performance is based on the following test conditions:

• 1,500 mg/L NaCl solution
• 150 psig (1.03 MPa) applied pressure
• 8% recovery
• 77°F (25°C)
• pH 6.5–7.0
• Permeate flow rate for each element may vary but will be no more than -5 %.

General Features:

• Permeate Flow Rate: 1,000 GPD (3.8 m³/day)
• Nominal Salt Rejection: 99.4% (Minimum 99.0%)
• Effective Membrane Area: 35 ft² (3.3 m²)

Mechanical / Hydraulic

• Element Length (A): 21.0 inch (533.4 mm)
• Element Diameter (B): 3.9 inch (99.0 mm)
• Inter-Connector Bore Length (C): 0.75 inch (19.1 mm)
• Brine Seal Diameter (D/E): 1.05 inch (26.7 mm)
• Inter-Connector Part Number: SWA01050
• Brine Seal Part Number: SWA01046
• Each membrane element is supplied with one interconnector (coupler) and four O-rings.
• All RE4021 elements fit nominal 4.0 inch (101.6 mm) I.D. pressure vessels.
• The element shell is FRP (Fiber Reinforced Plastic).

Feed Water

• Max. Feed Flow Rate: 18 gpm (4.09 m³/hr)
• Min. Concentrate Flow Rate: 4 gpm (0.91 m³/hr)
• Max. Turbidity: 1.0 NTU
• Max. SDI (15 min): 5.0
• Max. Chlorine Concentration: < 0.1 mg/L

General Handling Procedures

• Elements contained in the boxes 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 prohibit the growth of micro-organisms.
• 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; 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 element shell and use safety equipment.

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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 complete OEM PDF datasheet. Contractual data must match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet