LOW1-4021-XL

Summary

Product identification

• Model: LOW1-4021-XL
• Description: Extra Area - Low Energy, Very High Rejection - Brackish Water Element
• Configuration: Spiral Wound
• Membrane Polymer: Composite Polyamide
• Brine Spacer Material: Polypropylene

Performance Specifications

• Nominal Membrane Area: 45 ft² (4.2 m²)
• Permeate Flow: 1450 gpd (5.5 m³/d)
• Salt Rejection: 99.0% nominal (98.0% minimum)

Test Conditions

(After 30 min of operation)

• NaCl Solution: 1500 ppm
• Applied Pressure: 150 psi (10.3 bar)
• Operating Temperature: 77 °F (25 °C)
• Permeate Recovery: 10%
• pH Range: 6.5 ÷ 7.0

Mechanical / Hydraulic

Dimensions:

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

Operating limits

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

Notices & Guidelines

• Minimum permeate flow for individual elements may be 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; check the application status before use and sale.
• For element loading, use only glycerine to lubricate o-rings and brine seal.
• 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 text extracted from an OEM datasheet. It may not include all figures, footnotes, or the latest revisions. Contractual data must match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet