NF90 Membranes

Nanofiltration (NF) Membranes

NF90 Membranes

IonClear™ NF90 membranes provide high flux and excellent performance of removing monovalent and divalent salts. It has high removal rate of organic compounds, such as pesticides, herbicides and THM precursor, etc, as well as high removal of natural organic compounds. In the water treatment process, it can not only reduce the hardness of the water, but also effectively remove the toxic and harmful substances in the water, remove turbidity, color and organic matter. In addition, it can also recover valuable multi-valent salts and small molecular organics. It requires low net driving pressure, and can effectively remove impurities or recover useful substances under very low operating pressure. The system runs with low energy consumption and cost.

  • Excellent monovalent salt selective passage and polyvalent salt removal performance

  • Effective removal of pesticides, herbicides, TOC and THM precursors, etc.

  • Separation, concentration and recovery of economically valuable salts, precious metals and small molecular organics

  • Salt removal under ultra-low pressure and low energy consumption

Product Dimensions
Model
A inch (mm)
B inch (mm)
C inch (mm)
D inch (mm)
NF-90-400
40(1,016)
/
1.125 (29)
7.9 (201)
NF-90-82
37.9(963)
1.05 (26.7)
0.75(19)
3.9 (99)
Product Specifications
Model
Effective Membrane ft² (㎡)
Stabilized Rejection Rate(%)
Flux, gpd (m³/d)
NF-90-400
400(37.2)
>98.5
8200(31)
NF-90-82
82(7.6)
>98.5
1580(6)

Flux and rejection rate is based on the following standard test conditions: 0.48 MPa (70 psi) pressure, 77°F (25°C), 2,000 ppm MgSO solution and pH 8 for feedwater, and 15% recovery.

Operating and Cleaning Limits
  • Maximum Operating Pressure                41 bar (600 psi)
  • Maximum Operating Temperature        45°C (113°F )
  • Maximum Element Pressure Drop         1.0 bar (15psi)
  • pH Range Continuous Operation            3-10
  • pH Range Short-Term Cleaning               1-13
  • Maximum Feed SDI(SDI )                         5.0
  • Free Chlorine Tolerance                            < 0.1 ppm
Notes
  • Permeate flow for individual elements may vary ±15 percent from the value specified.
  • Active membrane area guaranteed ±4%.
  • Stabilized salt rejection is generally achieved within 24-48 hours of continuous use; depending upon feedwater characteristics and operating conditions.