Description
DOW FILMTEC™ brackish water reverse osmosis membrane elements provide consistent system performance in light industrial applications.
• DOW FILMTEC LE-4040 offers high performance at low pressure resulting in less energy usage and lower costs.
Elements with a hard shell exterior are recommended for systems with multiple-element housings containing three or more membranes, as they are designed to withstand higher pressure drops.
Product Type
Polyamide Thin-Film Composite
Dimension
40 in x 3.9 in
Product Specifications
| Applied Pressure |
Permeate Flow Rate |
Typical Stabilized Salt Rejection (%) |
||
| (psig) | (bar) | (GPD) | (m³/h) | |
| 2,500 | 9.5 | 99.0 | ||
- Permeate flow and salt rejection based on the following test conditions: 2,000 ppm NaCl, applied pressure: 150 psig (10.3 bar) for LE-4040 and 225 psig (15.5 bar) for BW30-4040 and BW30-2540, 77ºF (25ºC) and 15% recovery.
- Permeate flows for individual elements may vary ±20%.
- LE-4040 replaces BW30LE-4040.
Operating and Cleaning Limits
| Maximum Operating Temperature |
Maximum Operating Pressure |
Maximum Feed Flow |
Maximum Pressure Drop |
pH Range, Continuous Operation |
pH Range, Short-Term Cleaning (30 min.) |
Maximum Feed Silt Density Index (SDI) |
Free Chlorine Tolerance |
| 113°F (45°C) | 600 psig (41 bar) | 16 gpm (3.6 m³/h) | 15 psig (1.0 bar) | 2 - 11 | 1 - 13 | 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.
• Under certain conditions, the presence of free chlorine and other oxidizing 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 for more information.
Equivalent Products
Toray: TMG10D
GE: AK-90 LE