ESNA1-LF2-8040

Summary

Product identification

• Membrane Element: ESNA1-LF2-LD (Low Fouling Technology)
• Type: Low Fouling Spiral Wound
• Membrane Polymer: Composite Polyamide

Stable Performance

• Permeate Flow: 10,500 gpd (39.7 m³/d)
• CaCl₂ Rejection: 86%
• CaCl₂ Rejection (minimum/maximum): 83%/90%
• Expected calcium rejection for a typical 500 ppm well water is 93% at 13 gfd operating flux and 25 C.

Membrane Characteristics

• Configuration: Low Fouling Spiral Wound
• Membrane Active Area: 400 ft² (37.1 m²)
• Feed Spacer: 34 mil (0.864 mm)

Operating limits

• Maximum Applied Pressure: 600 psig (4.16 MPa)
• Maximum Chlorine Concentration: < 0.1 PPM
• Maximum Operating Temperature: 113 F (45 C)
• pH Range, Continuous (Cleaning): 2-10 (1-12)
• Maximum Feedwater Turbidity: 1.0 NTU
• Maximum Feedwater SDI (15 mins): 4.0
• Maximum Feed Flow: 75 GPM (17.0 m³/h)
• Minimum Ratio of Concentrate to Permeate Flow for any Element: 5:1
• Maximum Pressure Drop for Each Element: 10 psi

The limitations shown here are for general use. For specific projects, operating at more conservative values may ensure the best performance and longest life of the membrane. See Hydranautics Technical Bulletins for more detail on operation limits, cleaning pH, and cleaning temperatures.

Test Conditions

The stated performance is initial (data taken after 30 minutes of operation), based on the following conditions:

• 500 ppm CaCl₂
• 75 psi (0.52 MPa) Applied Pressure
• 77 F (25 C) Operating Temperature
• 15% Permeate Recovery
• 6.5 – 7.0 Feed pH

Mechanical / hydraulic

• A, inches (mm): 40.0 (1016)
• B, inches (mm): 7.89 (200)
• C, inches (mm): 1.125 (28.6)
• Weight, lbs. (kg): 36 (16.4)

Additional Notes

• Permeate flow for individual elements may vary -20/+25 percent.
• Membrane active area may vary +/-4%.
• All membrane elements are supplied with a brine seal, interconnector, and o-rings.
• Elements are vacuum sealed in a polyethylene bag containing less than 1.0% sodium bisulfite solution, and then packaged in a cardboard box.

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Disclaimer: This summary is based on text extracted from a PDF datasheet. This extraction may miss figures, footnotes, or revisions present in the original document. Contractual data must always match the OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet