DOW FILMTEC Standard Membrane Elements (TW30)
| Model No. | Permeate Flow Rate | Size (Dia.× Length) | Active Surface Area | Single Element Recovery | Applied Pressure | Stabilized Salt Rejection |
| TW30-2026 | 220 gpd (0.8 m³/d) | 2″ × 26″ | 7 sq. ft. | 10% | 225 psi | 99.5% |
| TW30-2514 | 200 gpd (0.8 m³/d) | 2.5″ × 14″ | 7 sq. ft. | 5% | 225 psi | 99.5% |
| TW30-2521 | 325 gpd (1.2 m³/d) | 2.5″ × 21″ | 13 sq. ft. | 8% | 225 psi | 99.5% |
| TW30-2540 | 1000 gpd (3.8 m³/d) | 2.5″ × 40″ | 28 sq. ft. | 15% | 225 psi | 99.5% |
| TW30-4014 | 525 gpd (2.0 m³/d) | 4″ × 14″ | 20 sq. ft. | 5% | 225 psi | 99.5% |
| TW30-4021 | 900 gpd (3.4 m³/d) | 4″ × 21″ | 36 sq. ft. | 8% | 225 psi | 99.5% |
| TW30-4040 | 2400 gpd (9.1 m³/d) | 4″ × 40″ | 78 sq. ft. | 15% | 225 psi | 99.5% |
Low and Extra Low Energy/Low Pressure Membrane Elements (LP & XLE)
| Model No. | Permeate Flow Rate | Size (Dia.× Length) | Active Surface Area | Single Element Recovery | Applied Pressure | Stabilized Salt Rejection |
| XLE-2521 | 365 gpd (1.4 m³/d) | 2.5″ × 21″ | 13 sq. ft. | 10% | 100 psi | 99.0% |
| XLE-2540 | 850 gpd (3.2 m³/d) | 2.5″ × 40: | 28 sq. ft. | 15% | 100 psi | 99.0% |
| XLE-4021 | 1025 gpd (3.9 m³/d) | 4″ × 21″ | 36 sq. ft. | 5% | 100 psi | 99.0% |
| XLE-4040 | 2600 gpd (9.8 m³/d) | 4″ × 40″ | 87 sq. ft. | 15% | 100 psi | 99.0% |
| LP-4040 | 2900 gpd (411.0 m³/d) | 4″ × 40″ | 78 sq. ft. | 8% | 145 psi | 99.2% |
- Permeate flow and salt rejection based on the following test conditions: TW30 2,000 ppm NaCl feed stream XLE & LP 500 ppm NaCl feed stream, 77°F (25°C) and the pressure & recovery rates listed above.
- Permeate flows for individual elements may vary +/-20%.
- For the purpose of improvement, specifications may be updated periodically.
- XLE-2540 replaces the LP-2540, which has been discontinued by DOW.
DOW FILMTEC BW30 Brackish Water RO Elements (BWRO)
DOW FILMTEC BW30-4040 brackish water reverse osmosis membrane elements offer consistent, exceptional system performance in light industrial applications. With the thickest feed spacer (34 mil) available in the industry today to lessen the impact of fouling, they may be cleaned over a wide pH range (pH 1-13) for the most effective cleaning.
| Model No. | Permeate Flow Rate | Size (Dia.”× Length”) | Active Surface Area (Sq. Ft.) | Feed Spacer Thickness (mil) | Applied Pressure (psi) | Stabilized Salt Rejection (%) | |
| gpd | m³/d | ||||||
| BW30-2540 | 850 | 3.2 | 2.5 × 40 | 28 | 34 | 225 | 99.5 |
| BW30-4040 | 2400 | 9.1 | 4 × 40 | 78 | 34 | 225 | 99.5 |
Low Energy /Low Pressure and High Rejection Elements (LE & HR)
The DOW FILMTEC LC 4040 product range are available to meet a wide variety of customer needs in commercial applications, from producing high purity water to delivering low total system costs.
- DOW FILMTEC LE-4040 delivers high performance at low pressure resulting in less energy usage and lower costs.
- LC LE-4040 delivers high quality water at low pressure at harsh water conditions, using Dow’s innovative, proprietary technology for low energy applications.
- DOW FILMTEC LC HR-4040 in a high rejection element that produces high quality water with our state of the art RO membrane.
| Model No. | Permeate Flow Rate | Size (Dia.”× Length”) | Active Surface Area (Sq. Ft.) | Feed Spacer Thickness (mil) | Applied Pressure (psi) | Stabilized Salt Rejection (%) | |
| gpd | m³/d | ||||||
| LC LE-4040 | 2500 | 9.5 | 4 × 40 | 94 | 15 | 125 | 99.1 |
| LC HR-4040 | 2900 | 11 | 4 × 40 | 94 | 15 | 225 | 99.5 |
- Permeate flow and salt rejection based on the following test conditions: 2,000 ppm NaCl, applied pressure as above, 77°F (25°C) and 15% recovery.
- Permeate flows for individual elements may vary +/-20%.
- For the purpose of improvement, specifications may be updated periodically.
- LC LE-4040 replaces BW30LE-4040 & LE-4040 (275173).
DOW FilmTec 8″ Brackish Water High Rejection RO Membrane Elements225psi Operating Pressure
- DOW FILMTEC BW30-365 and BW30-400/34 Elements use thick 34 mil feed spacer to minimize the impact of fouling and are ideal for reverse osmosis plant managers and operators dealing with challenging waters and wastewaters and looking for consistent, high performance, long element life and increased productivity.
- DOW FILMTEC BW30-400 and BW30HR-440 Elements are ideal for reverse osmosis plant managers and operators dealing with controlled pre-treatment waters and seeking consistency, high performance, long element life, increase productivity, high water quality.
| Model No. | Permeate Flow Rate | Size (Dia.× L) | Active Surface Area | Feed Spacer Thickness | Applied Pressure | Minimum Salt Rejection | Stabilized Salt Rejection | |
| gpd | m³/d | |||||||
| BW30-365 | 9,500 | 36 | 8”×40” | 365 ft2 | 34 mil | 225 psi | 99.0% | 99.5% |
| BW30-400 | 10,500 | 40 | 8”×40” | 400 ft2 | 28 mil | 225 psi | 99.0% | 99.5% |
| BW30-400/34 | 10,500 | 40 | 8”×40” | 400 ft2 | 34 mil | 225 psi | 99.0% | 99.5% |
| BW30HR-440 | 12,650 | 48 | 8”×40” | 440 ft2 | 28 mil | 225 psi | 99.4% | 99.7% |
| iLEC Interlocking Membrane Elements | ||||||||
| BW30-400/34i | 10,500 | 40 | 8”×40” | 400 ft2 | 34 mil | 225 psi | 99.0% | 99.5% |
| BW30HR-440i | 12,650 | 48 | 8”×40” | 440 ft2 | 28 mil | 225 psi | 99.4% | 99.7% |
Low Energy and High Rejection Brackish Water RO Membrane Elements125-150 psi Operating Pressure
The DOW FILMTEC low energy and extra low energy, high productivity brackish water reverse osmosis elements are designed to deliver high quality water at low operating costs for municipal and industrial water applications. DOW FilmTec LE and XLE Elements provide lower energy costs and more productivity, especially in cold waters, and minimize equipment CAPEX in designs with savings in elements and pumping.
| Model No. | Permeate Flow Rate | Size (Dia.× L) | Active Surface Area | Feed Spacer Thickness | Applied Pressure | Minimum Salt Rejection | Stabilized Salt Rejection | |
| gpd | m³/d | |||||||
| XLE-440 | 14,000 | 53 | 8”×40” | 440 ft2 | 28 mil | 125 psi | 98.0% | 99.0% |
| LE-400 | 11,500 | 44 | 8”×40” | 400 ft2 | 28 mil | 150 psi | 99.0% | 99.3% |
| BW30HRLE-440 | 12,650 | 48 | 8”×40” | 440 ft2 | 28 mil | 150 psi | 99.1% | 99.3% |
| iLEC Interlocking Membrane Elements | ||||||||
| XLE-440i | 14,000 | 53 | 8”×40” | 440 ft2 | 28 mil | 125 psi | 97.0% | 99.0% |
| LE-440i | 12,650 | 48 | 8”×40” | 440 ft2 | 28 mil | 150 psi | 99.0% | 99.3% |
| HRLE-440i | 12,650 | 48 | 8”×40” | 440 ft2 | 28 mil | 150 psi | 99.5% | 99.3% |
| BW30HRLE-440i | 12,650 | 48 | 8”×40” | 440 ft2 | 28 mil | 150 psi | 99.3% | 99.1% |
Fouling Resistant DOW FilmTec RO Membrane Elements
DOW FILMTEC Fouling Resistant reverse osmosis elements incorporate Dow’s proprietary FR (fouling resistant) membrane technology that provides excellent fouling resistance and cleanability and are designed to purify water with high biological or organic fouling potential in systems with well-controlled pretreatment. This high rejection membrane has a wide pH cleaning range (pH 1-13) that allows for effective cleaning of scale, organic compounds, and biofilm. These features offer system operators some of the best long-term economics and most trouble-free operation for RO membrane purification of fouling water.
| Model No. | Permeate Flow Rate | Size (Dia.”× L”) | Active Surface Area | Feed Spacer Thickness | Applied Pressure | Minimum Salt Rejection | Stabilized Salt Rejection | |
| gpd | m³/d | |||||||
| BW30FR-365 | 9,500 | 36 | 8”×40” | 365 ft2 | 34 mil | 225 psi | 99.0% | 99.5% |
| BW30XFR-400/34 | 11,500 | 43 | 8”×40” | 400 ft2 | 34 mil LDP | 225 psi | 99.4% | 99.65% |
| BW30XFRLE-400/34 | 11,500 | 43 | 8”×40” | 400 ft2 | 34 mil LDP | 150 psi | 99.1% | 99.3% |
| iLEC Interlocking Membrane Elements | ||||||||
| BW30XFR-400/34i | 11,500 | 44 | 8”×40” | 400 ft2 | 34 mil | 225 psi | 99.4% | 99.65% |
| BW30FR-400/34i | 10,500 | 40 | 8”×40” | 400 ft2 | 34 mil | 225 psi | 99.0% | 99.50% |
| XFRLE-400/34i | 11,500 | 44 | 8”×40” | 400 ft2 | 34 mil | 225 psi | 99.2% | 99.4% |
| BW30XFRLE-400/34i | 11,500 | 43 | 8”×40” | 400 ft2 | 34 mil LDP | 150 psi | 99.1% | 99.3% |
Permeate flow rate and salt rejection shown on this page are based on the following test conditions: 2,000ppm NaCl, design pressures listed above, 77°F (25°C), and 15% recovery. Permeate flow rates for individual elements may vary +25/-15%. The above specifications are benchmark values. Please be sure to operate according to our system design guidelines. Please see individual products’ specification sheet for operating limits and guidelines.
Commercial and Small Commercial Sized Seawater Desalination RO Membranes by DOW FilmTec
| Model No. | Permeate Flow Rate | Size (Dia.”× Length”) | Active Surface Area (Sq. Ft.) | Single Element Recovery (%) | Applied Pressure (psi) | Stabilized Salt Rejection (%) | |
| gpd | m³/d | ||||||
| SW30-2514 | 150 | 0.6 | 2.5” × 14” | 6.5 | 2 | 800 | 99.4 |
| SW30-2521 | 300 | 1.1 | 2.5” × 21” | 13 | 4 | 800 | 99.4 |
| SW30-2540 | 700 | 2.6 | 2.5” × 40” | 29 | 8 | 800 | 99.4 |
| SW30-4021 | 800 | 3.0 | 4.0” × 21” | 33 | 4 | 800 | 99.4 |
| SW30-4040 | 1,950 | 7.4 | 4.0” × 40” | 80 | 8 | 800 | 99.4 |
High Salt and Boron Rejection Commercial Seawater Desalination RO Membranes by DOW FilmTec
| Model No. | Permeate Flow Rate | Size (Dia.”× Length”) | Active Surface Area (Sq. Ft.) | Single Ele. Rec. (%) | Applied Pressure (psi) | Salt Rejection (%) | Stabilized Boron Rej. (%) | ||
| gpd | m³/d | Stabilized | Min. | ||||||
| SW30HRLE-4040 | 1,600 | 6.1 | 4.0” × 40” | 85 | 8 | 800 | 99.7 | 99.6 | 91.0 |
Permeate flow and salt rejection based on the following test conditions: 32,000 ppm NaCl feed stream (5ppm Boron, SW30HRLE), 77°F (25°C) and the pressure & recovery rates listed above. Permeate flows for individual elements may vary +/-20%.
For the purpose of improvement, specifications may be updated periodically.
HR, XHR, HRLE – High Salt & Boron Rejection Seawater Desalination RO Membranes by DOW FilmTec
The DOW FILMTEC SW30HR product line includes premium grade seawater reverse osmosis element featuring both high active area and high salt rejection to offer the best long-term economics for seawater deslination systems. DOW FILMTEC SW30HR delivers high boron rejection to help customers meet World Health Organization (WHO) and other drinking water standards.
| Model No. | Permeate Flow Rate | Size (Dia.”× Length”) | End Style | Active Surface Area (Sq. Ft.) | Feed Spacer Thickness (mil) | Salt Rejection (%) | Stabilized Boron Rej. (%) | ||
| gpd | m³/d | Stabilized | Min. | ||||||
| SW30HR-380 | 6,000 | 23 | 8”×40” | Standard | 380 | 28 | 99.70 | 99.6 | 92.0 |
| SW30HRLE-400 | 7,500 | 28 | 8”×40” | Standard | 400 | 28 | 99.75 | 99.6 | 91.0 |
| SW30XHR-400i | 6,000 | 23 | 8”×40” | iLEC Interconnecting | 400 | 28 | 99.82 | 99.70 | 93 |
| SW30HRLE-370/34i | 6,700 | 25 | 8”×40” | iLEC Interconnecting | 370 | 34 | 99.80 | 99.65 | 92 |
| SW30HRLE-400i | 7,500 | 28 | 8”×40” | iLEC Interconnecting | 400 | 28 | 99.80 | 99.65 | 92 |
| SW30HRLE-440i | 8,200 | 31 | 8”×40” | iLEC Interconnecting | 440 | 28 | 99.80 | 99.65 | 92 |
XLE & ULE – Low Energy Seawater Desalination RO Membranes by DOW FilmTec
DOW FILMTEC SW30XLE & SW30ULE elements offer a good combination of productivity and rejection resulting in a low energy seawater element and low operating cost. It is ideal for two-pass seawater designs and high TDS brackish water applications. DOW FILMTEC SW30XLE elements come with iLEC™ Interlocking Endcaps that reduce system operating costs and reduce the risk of o-ring leaks that cause poor water quality.
| Model No. | Permeate Flow Rate | Size (Dia.”× Length”) | End Style | Active Surface Area (Sq. Ft.) | Feed Spacer Thickness (mil) | Salt Rejection (%) | Stabilized Boron Rej. (%) | ||
| gpd | m³/d | Stabilized | Min. | ||||||
| SW30XLE-400i | 9,000 | 34 | 8”×40” | iLEC Interconnecting | 400 | 28 | 99.80 | 99.65 | 88 |
| SW30XLE-440i | 9,900 | 38 | 8”×40” | iLEC Interconnecting | 440 | 28 | 99.80 | 99.65 | 88 |
| SW30ULE-400i | 11,000 | 42 | 8”×40” | iLEC Interconnecting | 400 | 28 | 99.70 | 99.60 | 87 |
| SW30ULE-440i | 12,000 | 45 | 8”×40” | iLEC Interconnecting | 440 | 28 | 99.70 | 99.60 | 89 |
The above benchmark values are based on the following test conditions: 32,000 ppm NaCl, 5 ppm Boron, 800 psi (5.5 MPa), 77°F (25°C), pH 8 and 8% recovery. Permeate flows for individual elements may vary +/-15%. Product specifications may vary slightly as improvements are implemented.
DOW FilmTec Sanitiary Grade Full Fit RO Membrane Elements
DOW FILMTEC RO Full Fit elements deliver high flux and outstanding quality water for applications requiring sanitary-grade membrane elements. The full-fit configuration minimizes stagnant areas and is optimal for applications requiring a sanitary design. DOW FILMTEC™ RO-390-FF elements are the premier membrane for evaporator condensate polishing.
| Model No. | Permeate Flow Rate | Size (Dia.× L) | Active Surface Area | Applied Pressure | Stabilized Salt Rejection | |
| RO-4040-FF | 2,400 gpd | 9.1 m3/d | 4”×40” | 85 ft2 | 225 psi | 99.5% |
| RO-390-FF | 10,800 gpd | 40.93d | 8”×40” | 390 ft2 | 225 psi | 99.5% |
Permeate flow and salt rejection based on the following test conditions: 2,000 ppm NaCl, pressure specified above, 77°F (25°C) and 15% recovery. Elements must be conditioned prior to start-up. A one-time flux loss will occur during stabilization. Listed values apply after performance stabilization. Permeate flows for individual elements may vary +/-20%.
DOW FilmTec Heat-Sanitizable Full Fit RO Membrane Elements
DOW FILMTEC HSRO Elements are heat-sanitizable reverse osmosis elements that deliver outstanding quality water with the added capability to withstand sanitization with hot water, eliminating the need for chemical sanitizers. The full-fit configuration minimizes stagnant areas and is optimal for applications requiring a sanitary design.
| Model No. | Permeate Flow Rate | Size (Dia.× L) | Active Surface Area | Applied Pressure | Stabilized Salt Rejection | |
| HSRO-4040-FF | 1,900 gpd | 7.2 m3/d | 4”×40” | 90 ft2 | 150 psi | 99.5% |
| HSRO-390-FF | 9,000 gpd | 34.1 m3/d | 8”×40” | 390 ft2 | 150 psi | 99.5% |
Permeate flow and salt rejection based on the following test conditions: 2,000 ppm NaCl, pressure specified above, 77°F (25°C) and 15% recovery. Elements must be conditioned prior to start-up. A one-time flux loss will occur during stabilization. Listed values apply after performance stabilization. Permeate flows for individual elements may vary +/-20%.
