FilmTec™ NF90-400/34i

Spiral-wound element with polyamide thin-film composite membrane


General Information

  • Permeate flow and salt passage based on the following test conditions:2,000 mg/l MgSO4, 70 psi (4.8 bar), 77°F (25°C) and 15% recovery.
  • Flow rates for individual elements may vary but will be no more than ±15%.
  • Stabilized salt rejection is generally achieved within 24-48 hours of continuous use; depending upon feedwater characteristics and operating conditions.



Operating and Cleaning Limits
Maximum Operating Temperature  113°F (45°C)
Maximum Operating Pressure  600 psig (41 bar)
Maximum Element Pressure Drop 15 psig (1.0 bar)
pH Range
Continuous Operation
Short-Term Cleaning (30 min)
2 – 11
1 – 13
Maximum Feed Silt Density Index (SDI  SDI 5
Free Chlorine Tolerance  < 0.1 ppm