Bumblebee Linens

Description
The DOW FILMTEC™ NF90 membrane elements provide high productivity performance while removing a high percentage of salts, nitrate, iron and organic compounds such as pesticides, herbicides and THM precursors. The low net driving pressure of the NF90 membrane allows the removal of these compounds at low operating pressures.

Product Type
Polyamide Thin-Film Composite

Dimension
40 in x 2.4 in

Product Specifications

Applied
Pressure
Permeate
Flow Rate
Typical
Stabilized
Salt
Rejection (%)
(psig) (bar) (GPD) (m³/h)
 70 4.8 680 2.6 > 97.6
  1. Permeate flow and salt rejection based on the following test conditions: 2,000 ppm MgSO₄, 77°F (25°C) and 15% recovery at the pressure specified above.
  2. Permeate flows for individual NF90-2540 elements may vary by -20% / +30%. NF90-4040 individual elements may vary -15% / +50%.
  3. Developmental products available for sale.

Operating and Cleaning Limits

Maximum
Operating Temperature
Maximum
Operating Pressure
Maximum Feed Flow Rate Maximum Pressure Drop (tape wrapped) Maximum Pressure Drop (fiberglassed) pH Range,
Continuous Operation
Maximum Feed
Silt Density
Index (SDI)
Free
Chlorine
Tolerance
113°F (45°C) 600 psig (41 bar) 6 gpm (1.4 m³/hr) 13 psig (0.9 bar) 15 psig (1.0 bar) 2 – 11 SDI 5 < 0.1 ppm

• Maximum temperature for continuous operation above pH 10 is 95°F (35°C).
• Refer to Cleaning Guidelines in specification sheet 609-23010 for NF90.
• Under certain conditions, the presence of free chlorine and otheroxidizing agents will cause premature membrane failure. Since oxidation damage is not covered under warranty, DOW FILMTEC recommends removing residual free chlorine by pretreatment prior to membrane exposure. Please refer to technical bulletin 609-22010 formore information