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Brand Name : DOW
Model Number : LC LE PRO-4040
Certification : CE
Place of Origin : China
MOQ : 1 pc
Price : Negotiable
Supply Ability : 60000 Units per Month
Packaging Details : standard export packing
Features : Low Working Pressure
Process : Winded
Categary : Industrial Membrane Element
Barcol Hardness Test : repeated once every 1.5 meters
Ph Range : 2-11
Temperature : 25℃)
Operating Pressure : 150-300 psi
Product Productivity : 250L/Hour
Flow Rate : 100-5000 GPD
Main Feature : Ultra-low Pressure
Product Connection Type : End port, side port, multi-port optional
Components : membrane
Burst Test : 6 times of its design pressure.
Product Core Components : membrane
Advantage Of Membrane : Ultra Low Pressure
The DOW FilmTec™ LC LE PRO-4040 Reverse Osmosis Membranes deliver high-quality water at low pressure, even under harsh water conditions. These membranes utilize DuPont's innovative, proprietary technology for low-energy applications, offering significant benefits in both efficiency and performance:
Industry-Leading Active Area (94 sqft): Ensures reduced fouling due to lower operating flux while still achieving higher flow rates.
High Salt Rejection: Operates at low pressures in harsh water conditions, offering exceptional salt rejection.
Effective Cleaning Performance: Features the widest cleaning pH range (1-13) and outstanding chemical tolerance, ensuring durability and reliability.
The LC LE PRO-4040 Reverse Osmosis Membranes are ideal for various light industrial applications, particularly those requiring high-quality permeate water. Typical uses include:
Harsh Feed Water Conditions
Drinking Water: Suitable for refilling stations, bottling plants, hotels, schools, and institutions.
| Product Part Number | Dry Permeate Flow Rate (gpd / m³/d) | Min. Salt Rejection (%) | Stabilized Salt Rejection (%) |
|---|---|---|---|
| LC LE PRO-4040 | 2600 (9.8) | 99.0 | 99.5 |
Test Conditions: 2000 ppm NaCl, 77°F (25°C), 15% recovery, pH 8, applied pressure 150 psig. Individual permeate flows may vary +/- 20%.

The LC LE PRO-4040 Reverse Osmosis Membranes have the following operating and cleaning parameters:
| Property | Limit |
|---|---|
| Membrane Type | Polyamide Thin-Film Composite |
| Maximum Operating Temperature | 113°F (45°C) |
| Maximum Operating Pressure | 600 psig (41 bar) |
| Maximum Pressure Drop | 15 psig (1.0 bar) |
| Maximum Feed Flow Rate | 16 gpm (3.6 m³/h) |
| pH Range (Continuous Operation) | 2 - 11 |
| pH Range (Short-Term Cleaning) | 1 – 13 |
| Maximum Feed Silt Density Index (SDI) | 5 |
| Free Chlorine Concentration | < 0.1 ppm |
Note: Maximum temperature for continuous operation above pH 10 is 95°F (35°C). Refer to FilmTec™ Cleaning Guidelines for specific cleaning instructions.
To ensure the longevity and performance of the DOW FilmTec™ LC LE PRO-4040 Reverse Osmosis Membranes, please follow these operational guidelines:
Keep elements moist at all times after initial wetting.
For successful operation of Reverse Osmosis (RO) and Nanofiltration (NF) membrane systems, refer to FilmTec™ Reverse Osmosis / Nanofiltration Elements Operation Excellence and Limiting Conditions Tech Fact.
To prevent biological growth during system shutdowns, immerse membrane elements in a preservative solution.
Maximum pressure drop across an entire pressure vessel (housing) is 50 psi (3.4 bar).
Avoid static permeate-side backpressure and discard permeate obtained from the first hour of operation.
Proper start-up of the Reverse Osmosis Membranes is crucial for optimal performance. Follow the recommended procedures to prevent damage from overfeeding or hydraulic shock. The FilmTec™ Reverse Osmosis Membranes Technical Manual provides detailed guidance.
System Start-Up: Ensure all system checks are completed before initiating start-up, including membrane pretreatment and instrument calibration.
This product may be subject to drinking water application restrictions in some countries. Please verify application status before use and sale.
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DOW FilmTec™ LC LE PRO-4040 Water Treatment With Barcol Hardness Test Every 1.5 Meters At 25C Reverse Osmosis Membranes Images |