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.

 

RO Membrane Sizes

  • Industrial: 4 inchand 8 inchdiameter and 40″ length.
  • Commercial: From 2.5 inchto 4 inchin diameter and 14″ to 40″ length.
  • Residential: from 1.8″ to 3″ in diameter and 12″ to 14″ in length.
  • Customised sizes for specific applications.

 

 

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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).

 

 

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.

 

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.

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Low Pressure Membranes

Recommended for low salinity applications or in applications where low energy consumption is an important consideration, they deliver high permeate flows and salt rejection at lower inlet water pressures.
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Seawater Membranes

Used for Seawater desalination systems, Marine and maritime watermakers.

For yacht and boat desalination units.

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Membrane Housings

2.5″, 4″ and 8″ membrane pressure vessels / RO membrane housings that range in pressure from 300 psi all the way up to 1200 psi.

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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
Lanxess
B085 FR 4040
    Hydranautics
LFC3-LD-4040
Toray
TML10D
 
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
   
Lanxess
B400 FR
Filmetc
BW30-400FR
  Hydranautics
LFC3-LD-8040
Toray
TML20D-400
CSM
RE8040-FEn34
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
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

Australian Supplier of quality 2.5″ inch / 4″ inch / 8″ inch desalination reverse osmosis membranes.

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