Reverse Osmosis Membranes
Reverse osmosis systems provide the finest level of filtration. The reverse osmosis process removes a large majority of contaminants from water by pushing the water using a high pressure pump through a semi-permeable membrane. The reverse osmosis membrane surface acts as a barrier to dissolved salts, inorganic molecules, and organic molecules, whilst still allowing water molecules to pass through. This thin film composite membrane rejects contaminants based on their size and charge. Any contaminant that has a molecular weight greater than 200 is likely rejected.
MDC Water is one of the main RO membrane suppliers in Australia. We stock a large collection of industrial, commercial and residential reverse osmosis membrane systems manufactured by DuPont Filmtec, Hydranautics, LG, Suez (Lanxess), Vontron, Toray and others. We provide RO membranes which are 1.8, 2.5, 4 and 8 inch in diameter, we also offer different membranes for sea water applications, brackish water applications and many specialised high flow commercial and industrial applications..
The semipermeable membrane in your reverse osmosis water system is one of the key things that will determine the quality of your whole RO system. At MDC Water we offer a wide range of best quality reverse osmosis membrane replacements.
Reverse Osmosis Membrane Applications
There are a variety of reverse osmosis RO membranes in use throughout the market which act as processes in treating groundwater, surface water, and wastewater to a level that is acceptable for industries and especially consumption.
- A reverse osmosis system is commonly used for low salt passage (desalination) of seawater and brackish water for potable, commercial and industrial uses.
- Production of ultrapure water. High purity water can be produced by means of double pass desalination. RO is used as a primary treatment to produce Ultrapure water for many industrial applications that require demineralised or deionised water. Further post treatment after the RO system such as EDI or mixed bed resin can increase the quality of the RO permeate and make it suitable for the most ultra pure water applications.
- Wastewater treatment. Membrane technology is playing an increasingly important role in the reclamation of municipal wastewater. RO membranes have been proven to successfully treat such waste water and provide water that exceeds reuse quality requirements. In the case of industrial wastewater, RO is used in those industries where it is possible to improve the efficiency of the process by recuperating valuable components that can be recycled in the production process, or where reuse of the treated water represents an important reduction in the consumption of water.
RO Membrane Types
- Brackish water membranes.
- Low and ultra low pressure membranes.
- Seawater membranes.
- Many types such as high salt rejection, high flow, fouling resistant membranes .. and more.
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Brackish Water Membranes
They provide high permeate flows and high salt rejection at high salinity inlet water (up to 8,000 ppm NaCl Salinity), the best balance of flow and salt rejection.
BW RO membranes require medium to high inlet applied water pressure (around 200 to 300 PSI).
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Filmtec BW30-4040 4″ x 40″ Brackish Water Membrane
$495.00- 4”x40” Durable Brackish Water Membrane.
- 2400 gpd / 99.5% / 225 PSI.
- Provides consistent and outstanding system performance.
- Suitable for high salinity brackish water.
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RO Membrane Vontron LP21-4040
$365.004”x40” 4040 Brackish Water RO Membrane 2400 gpd / 99.5% / 225 PSI Provides high permeate flow and high salt rejection at hi salinity inlet water Equivalent to Filmtec BW30-4040 -
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LG RO Membrane – BW 4040 R
$419.00- 4”x40” Hi Rejection Brackish Water Membrane.
- 2500 gpd / 99.6% / 225 PSI.
- Offers a combination of high rejection and reliability.
- Suitable for high salinity brackish water.
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Hydranautics CPA5-LD-4040
$455.00- 4”x40” Hi Rejection Brackish Water Membrane.
- 2100 gpd / 99.7% / 225 PSI.
- Offers a combination of high rejection and reliability.
- Suitable for high salinity brackish water.
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Suez AG-85 P FR 4040 Membrane
Previously Lewabrane RO B085 FR 4040 4”x40” Low Fouling Brackish Water RO Membrane 2,400 gpd / 99.5% / 225 PSI Provides the highest productivity and high salt rejection at hi salinity inlet water., Designed for water with a higher organic or biological fouling rate
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Filmtec BW30-400 Brackish Water RO Membrane
- 8”x40” Durable Brackish Water Membrane.
- 10,500 gpd / 99.5% / 225 PSI.
- Provides consistent and outstanding system performance.
- Suitable for high salinity brackish water.
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Lewabrane RO B440 HR
8”x40” High Rejection and High Flow RO Membrane 11,000 gpd / 99.7% / 225 PSI / 440 ft² Provides the highest salt rejection up to 99.7%, and the best permeate water quality
Low Pressure / Ultra Low Pressure Membranes
Low Energy (LE) and Low Pressure (LP, ULP) membrane elements are recommended for low-moderate salinity applications or/and in applications where low energy consumption is an important consideration.
The low energy / low pressure elements are designed with a highly efficient polyamide membrane barrier layer, providing high flow productivity combined with good salt rejection. Low pressure membrane elements are based on 150 PSI (10.3 bar) working pressure.
Ultra low pressure membranes (XLE, XLP, ULP) are designed for low salinity water to operate at ultra low pressure (extremely low energy). The high permeability results in up to 40% lower energy consumption compared to standard elements. ULP and XLP membrane elements are based around 100-110 PSI (around 7 bar) inlet applied water pressure.
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Suez AG-85 P LE Low Pressure 4040 Membrane
$469.00Previously Lewabrane B085 LE 4040 4”x40” Low Pressure Membrane 2,000 gpd / 99.5% / 150 PSI Recommended where low energy consumption is an important consideration -
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Lewabrane RO B085 ULP 4040
$475.00Lewabrane RO B085 ULP 4040 4 inch x 40 inch Ultra Low Pressure ULP Membrane 2,150 gpd / 99.5% / 110 PSI Designed for Low Salinity Inlet Water to Operate at Ultra Low Pressure (7.8 bar / 110 PSI) -
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Vontron ULP11-4040 Hi Flo
$365.004”x40” Hi Flow and Low Pressure Membrane 2,700 gpd / 98% / 150 PSI Recommended Where Hi Product Water Flow and Low Energy Consumption are needed -
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Vontron XLP11-4040
$365.004”x40” Extremely Low Pressure Membrane 2,000 gpd / 98% / 100 PSI Designed for Low Salinity Inlet Water to Operate at Ultra Low Pressure (6.9 bar / 100 PSI) -
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Vontron ULP21-4040 RO Membrane
$365.004”x40” 4040 Low Pressure Membrane 2400 gpd / 99% / 150 PSI Typical operating pressure of 150PSI (1050kPa) Will be available early February 2022 -
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LG RO Membrane BW 4040 ES
$419.00- 4”x40” Low Pressure Brackish Water Membrane.
- 2500 gpd / 99.5% / 150 PSI.
- high permeability at low feed pressure.
- Suitable for low to medium salinity brackish water.
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Vontron ULP21-4021
$275.004”x21” Low Pressure Membrane 950 gpd / 99% / 150 PSI Typical operating pressure of 150PSI (1050kPa)
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Vontron ULP21-2540 RO Membrane
$325.002.5”x40” 2540 Low Pressure Membrane 750 gpd / 99% / 150 PSI Typical operating pressure of 150PSI (1050kPa) -
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Vontron ULP21-2521 RO Membrane
$295.002.5”x21” 2521 Low Pressure Membrane 300 gpd / 99% / 150 PSI Typical operating pressure of 150PSI (1050kPa)
Seawater Reverse Osmosis Membranes
We offer a variety of premium grade seawater reverse osmosis elements featuring both high productivity and high salt rejection to offer long-term economics for seawater desalination systems.
SWRO membrane Applications:
– Marine and Maritime watermakers.
– Sea and land-based desalinators.
– Seawater and high brackish water desalination plants.
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Filmtec SW30-2540
$479.00SW30-2540 DuPont Filmtec 2.5″ x 40″ Seawater Desalination Membrane, Watermaker Membrane, FREE Delivery. -
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Filmtec SW30-2521
$494.00SW30-2521 Dow Filmtec 2.5" x 21" Watermaker & Desalinator Membrane, Seawater Membrane. -
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Watermaker Membrane Vontron SW11-2521
$355.00Vontron SW11-2521, 2.5" x 21" Watermaker Membrane Replacement, Seawater RO Membrane.
Brackish Water Membranes
Provide high permeate flows and salt rejection at high salinity inlet water (up to 8,000 ppm NaCl Salinity), the best balance of flow and salt rejection.
Low Pressure Membranes
Seawater Membranes
For yacht and boat desalination units.
Membrane Housings
Our Membrane Housing Best Sellers
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2.5″x21″ Membrane Pressure Vessel
$395.001000 PSI Membrane Housing For Watermakers & Seawater Desalination -
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2.5″x40″ Membrane Housing
$239.00300 PSI Membrane Housing For 2.5"x40" 2540 Membranes -
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2.5″x40″ Membrane Pressure Vessel
$445.001000 PSI Membrane Housing For Watermakers & Seawater Desalination, FREE Delivery (regional areas excluded)*
Competitive Reverse Osmosis Membranes Comparison Guide
DuPont Filmtec / GE Desal / Hydranautics / Tory / CSM
| Lanxess | Dow / Filmtec | GE / Desal | Hydranautics | Toray | CSM |
| Lanxess B085 HF 4040 |
Filmetc BW30-4040 |
GE Desal AG4040FF |
Hydranautics CPA2-4040 |
Toray TM710 |
CSM RE4040-BE |
| Lanxess B085 LE 4040 |
Filmetc LE-4040 |
Hydranautics ESPA2-LD-4040 |
CSM RE4040-BLN |
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| Lanxess B085 FR 4040 |
Hydranautics LFC3-LD-4040 |
Toray TML10D |
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| Lanxess S085 HR 4040 |
Filmetc SW30-4040 |
GE Desal SE4040FF |
Hydranautics SWC1-4040 |
Toray TM-810L |
CSM RE4040-SHA |
| Lanxess B400 HF |
Filmetc BW30-400 |
GE Desal AG8040F400 |
Hydranautics CPA3 |
Toray TM720-400 |
CSM RE8040-BE |
| Lanxess B400 HR |
Filmetc BW30-400 |
Hydranautics CPA5-LD |
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| Lanxess B400 FR |
Filmetc BW30-400FR |
Hydranautics LFC3-LD-8040 |
Toray TML20D-400 |
CSM RE8040-FEn34 |
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| Lanxess B400 LE |
Filmetc LE-400 |
GE Desal AK8040F |
Hydranautics ESPA |
Toray TM820H-370 |
CSM RE8040-BL |
| Lanxess S400 HR |
Filmetc SW30HRLE–400 |
Hydranautics SWC3 |
Toray TM820H-400 TM820C-400 |
CSM RE8040-SH |
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| Lanxess | Dow / Filmtec | GE / Desal | Hydranautics | Toray | CSM |
PS: this chart is a general guide only, please email us to source membranes for you or offer an alternative that is currently stocked