LOW4-4021-XL

Summary

Product identification

• Model: LOW4-4021-XL
• Type: Extra Area - Extra Low Energy, Excellent Productivity - Brackish Water El.
• Configuration: Spiral Wound
• Membrane Polymer: Composite Polyamide
• Brine Spacer Material: Polypropylene

Performance specifications

• Nominal Membrane Area: 45 ft² (4.2 m²)
• Permeate Flow: 1300 gpd (4.92 m³/d)
• Salt Rejection: 99.0% nominal (98.0% minimum)

Test Conditions

(Performance data is based on the following conditions, after 30 minutes of operation)

• NaCl Solution: 500 ppm
• Applied Pressure: 100 psi (6.9 bar)
• Operating Temperature: 77 °F (25 °C)
• Permeate Recovery: 10%
• pH Range: 6.5 ÷ 7.0

Operating limits

• Maximum Operating Pressure: 300 psi (20.7 bar)
• Maximum Operating Temperature: 113 °F (45 °C)
• Maximum Pressure Drop: 10 psi (0.7 bar)
• Maximum Feed Flow: 12 gpm (45.4 lpm)
• Maximum Chlorine Concentration: <0.1 ppm
• Feedwater pH Range: 3.0 ÷ 10.0
• Maximum Feedwater SDI (15min): 5.0
• Maximum Feedwater Turbidity: 1.0 NTU
• Minimum ratio of concentrate to permeate flow for any element: 5:1

Note: The limitations listed are for general use. For specific projects, values may be more conservative to ensure optimal performance and membrane lifespan.

Mechanical / hydraulic

• Length (A): 21.0 inches (533.4 mm)
• Diameter (B): 3.95 inches (100.3 mm)
• Connection Diameter (C): 0.75 inches (19.1 mm)
• Core Tube Extension Feed Side (DF): 1.2 inches (30.5 mm)
• Core Tube Extension Concentrate Side (DC): 1.2 inches (30.5 mm)
• Weight: 4 lbs (1.8 Kg)

Important notes and warnings

• Minimum permeate flow for individual elements is 20 percent below listed flow.
• Elements are vacuum sealed in a polyethylene bag containing less than 1.0% sodium meta-bisulfite and 10% propylene glycol solution.
• Permeate obtained from the first hour of operation should be discarded.
• Avoid static permeate-side backpressure at all times.
• These membranes may be subject to drinking water application restrictions in some countries; please check application status before use and sale.
• For element loading, use only glycerine to lubricate o-rings and brine seal.
• The customer is fully responsible for the effects of incompatible chemicals on elements. The presence of free chlorine and other oxidizing agents will cause membrane failure, and this damage is not covered under warranty.

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Disclaimer: This summary is based on the provided text extraction. It may not include all figures, footnotes, or the latest revisions found in the official PDF datasheet. Contractual data should always match the OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet