Qfx SW 75 ES

QuantumFlux Seawater Reverse Osmosis (RO) Elements

Qfx SW 90 ES photoNanoH2O's thin-film nanocomposite (TFN) QuantumFlux membranes lower the cost of desalination by improving energy efficiency and productivity. Qfx membranes feature benign nanomaterials incorporated into the thin-film polyamide layer of a composite membrane. This innovative patented and patent-pending technology significantly increases membrane permeability while matching best-in-class salt rejection.

  • Higher flux matching best-in-class salt rejection
  • Standard 4-inch spiral wound element design
  • Easy to retrofit into existing RO plants

Product Specifications

  Qfx SW 75 ES
Active Membrane Area 7.0 m² (75 ft²)
Permeate Flow Rate 9.6 m³/d (2,530 gpd)
Minimum NaCI Rejection 99.7%
Stabilized NaCI Rejection 99.8%
Feed Spacer 28mil
Stabilized Boron Rejection 89.0
  Note: the above values are normalized to the following conditions: 32,000 ppm NaCl, 5 ppm boron, 800 psi (5.5 MPa), 77°F (25°C), pH 8, 8% recovery. Permeate flows for individual elements may vary +/- 15%.

Operating Specifications

  Qfx SW 75 ES
Max. Applied Pressure 8.27 MPa (1,200 psig)
Max. Chlorine Concentration < 0.1 ppm
Max. Operating Temperature 45°C (113°F)
pH Range, Continuous (Cleaning) 2-11 (1-13)
Max. Feedwater Turbidity 1.0 NTU
Max. Feedwater SDI (15 minutes) 5.0
Max. Feed Flow 4.3 m³/h (19 GPM)
Min. Ratio of Concentrate to Permeate Flow for any Element 5:1
Max. Pressure Drop for Each Element 0.7 bar (10 psi)

Product Dimensions



  Qfx SW 75 ES
Length 101.6 cm (40 in.)
Element Outside Diameter (O.D.) 99 mm (3.9 in.)
Permeate Tube Inside Diameter (I.D.) 19 mm (0.75 in.)
Connector Length 26.7 mm (1.05 in.)