LG RO Membrane BW 4040 ES



  • 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.
  • FREE Delivery (regional areas excluded)*

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SKU: LG BW 4040 ES Category: Tag:

LG Reverse Osmosis Membrane, BW 4040 ES Element, 4 inch x 40 inch 4040 Low Pressure RO Membrane

LG BW 4040 ES Energy Saving Brackish Water RO membranes offer high permeability at low feed pressure significantly reducing operating costs; suitable for low to medium salinity brackish water applications.

It operates at Low Pressure (10.3 bar / 150 PSI) inlet feed water pressure.

LG BW 4040 ES Enery Saving BWRO membranes offer a combination of high rejection, high flow, low pressure feed water, reliability and durability,

LG Chem’s NanoH2O™ brackish water RO membranes serve various municipal and industrial applications and major utilities around the world. LG BWRO membranes, all incorporated with innovative Thin Film Nanocomposite (TFN) technology, are offered in industry standard configurations and can easily fit into existing and new RO plants.   

All LG BWRO membranes provide superior performance along with intrinsic anti-fouling property and are suitable for applications where consistent and reliable performance is a must.     

Product Specifications:

Stabilized Salt Rejection: 99.5%*
Minimum Salt Rejection: 99.2%
Permeate Flow: 2500 gpd (9.5 m³/day)*
Membrane Area: 85 ft².
Diameter / Length: 4 inch / 40 inch.
*Test conditions: 2000 mg/l NaCl, 10.3 bar (150 psi), 25 °C (77 °F), pH 7, recovery rate 15%.
*Pre-treatment must be used to protect the membrane (softener, antiscalant dosing pump, sand filter, carbon filter, 5 mic cartridge fitler ...etc).   

Compatible with reverse osmosis membrane types:*

LG BW 4040 ES Membrane Element can be used as a replacement for the below membrane elements in your existing water treatment equipment.
FilmTec LC LE-4040 / Filmtec BW LE-4040 / GE Desal 4040 / Hydranautics ESPA2-LD-4040 / Toray TMG10D / CSM RE4040-BLN / Axeon HF1-4040.
*Check the data sheet for each membrane.   

Operation Conditions:

Max. working pressure:  600 psi (4.14MPa)
Max. Feed water flow:  16 gpm (3.6 m3/h)
Max. Temperature of Feed water:  45℃
Max. Feed water SDI (15 mins):  5.
Max. Feed Water Total Hardness: 10 ppm (softener or antiscalant should be used).
pH Range of Feed water during Continuous Operation:  2~11
pH Range of Feed Water during Chemical Cleaning:  2~12
Residual chlorine Concentration of feed water <0.1ppm Max.
Pressure drop of single membrane element:  15psi (0.1MPa)     

Commercial Application:

- Drinking water.
- Softened water for homes, hotels, commercial laundries and car wash.
- Spot free rinse for window cleaning and solar panel cleaning
- Pure water for pharmaceuticals, laboratories, Hemodialysis and electronics
- Sterilisers and autoclaves.
- Chemical industry.
- Aquarium water treatment.
- Boiler and cooling towers make-up water.
- Pure water, boiler water replenishment, foodstuff processing, and pharmaceutical production. 

Manufactured by: LG Chem, Korea. (assembled in china).

* We offer FREE Shipping within Australia, however we might charge you in case of remote areas. If you are in a remote area, please contact us before buying this item, Cant be send to a postal address (big item). 

Technical Data Sheet 


Additional information

Weight 5.33 kg
Dimensions 109 × 13 × 12 cm


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