LOW3-4021

Summary

Product identification

The LOW3-4021 is a Low Energy, Excellent Productivity brackish water element.

Specifications

• Configuration: Spiral Wound
• Membrane Polymer: Composite Polyamide
• Brine Spacer Material: Polypropylene

Performance (Test Conditions)

• Nominal Permeate Flow: 1200 gpd (4.54 m³/d)
• Salt Rejection: 98.5% nominal (97.0% minimum)
• Nominal Membrane Area: 35 ft² (3.2 m²)

Performance is based on the following test conditions (after 30 minutes 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)
• Outside Diameter (B): 3.95 inches (100.3 mm)
• Permeate Connection Diameter (C): 0.75 inches (19.1 mm)
• Core Tube Extension (DF, Feed Side): 1.2 inches (30.5 mm)
• Core Tube Extension (DC, Concentrate Side): 1.2 inches (30.5 mm)
• Weight: 4 lbs (1.8 Kg)

Operating limits

• Maximum Operating Pressure (Fiberglassed): 600 psi (41.4 bar)
• Maximum Operating Pressure (Tape Wrapped): 300 psi (20.7 bar)
• Maximum Temperature: 113 °F (45 °C)
• Maximum Pressure Drop: 10 psi (0.7 bar)
• Maximum Feed Flow: 12 gpm (45.4 lpm)
• Feed Chlorine Concentration: <0.1 ppm
• Feedwater pH Range: 3.0 ÷ 10.0
• Feedwater SDI (15 min): 5.0
• Feedwater Turbidity: 1.0 NTU
• Minimum ratio of concentrate to permeate flow for any element: 5:1

The limitations shown are for general use. Values may be more conservative for specific projects.

Notices and Guidelines

• Minimum permeate flow for individual elements is 15 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 application status before use.
• 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 such damage is not covered under warranty.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions. For contractual data, always refer to the official OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet