ESNA1-LF2-LD

Summary

Product Identification

• Membrane Element: ESNA1-LF2-LD (Low Fouling Technology)
• Configuration: Low Fouling Spiral Wound
• Membrane Polymer: Composite Polyamide
• Membrane Active Area: 400 ft² (37.1 m²)
• Feed Spacer: 34 mil (0.864 mm) with biostatic agent

Stable Performance

• Permeate Flow: 10,500 gpd (39.7 m³/d)
• CaCl₂ Rejection: 90%
  • Minimum/Maximum: 85%/95%
  • Expected calcium rejection for a typical 500 ppm well water is 93% at 13 gfd operating flux and 25 ºC.

Operating Limits

• Maximum Applied Pressure: 600 psig (4.14 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 above are for general use. For specific projects, operating at more conservative values may ensure the best performance and longest life of the membrane. Refer to 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

• Length (A): 40.0 inches (1016 mm)
• Diameter (B): 7.89 inches (200 mm)
• Inner Diameter (C): 1.125 inches (28.6 mm)
• Weight: 33 lbs (15 kg)

Additional Notes

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

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Disclaimer: This summary is based on the provided text extraction and may not include all figures, footnotes, or the latest revisions found in the official PDF datasheet. Contractual data for any project must match the specific OEM PDF revision used on that project.

Official datasheet (PDF)

PDF datasheet