4040 LG RO membrane Model: BW 4040 ES

1. What is the LG BW 4040 ES used for?

It's a brackish water RO membrane built for industrial and commercial water treatment — pharmaceuticals, food and beverage, power plants, and commercial water systems where energy efficiency matters.

2. What does "ES" stand for, and how is it different from the "R" series?

ES stands for Energy Saver — this model is tuned to deliver strong salt rejection at lower applied pressure than the "R" (High Rejection) series, reducing ongoing energy costs. The R series instead prioritizes maximum rejection above energy efficiency.

3. What is the salt rejection rate?

Up to 99.5%, high enough for most industrial and commercial brackish water applications.

4. What size is this membrane?

Standard 4040 format — 4 inches diameter, 40 inches length.

5. Should I choose the ES or the R series for my plant?

If minimizing electricity cost over continuous operation is your priority, choose ES. If maximum rejection percentage is the priority regardless of energy input, choose the R series instead.

6. Is this membrane suitable for seawater?

No — this is a brackish water membrane. For seawater desalination, see LG's SW 400 R or SW 400 ES models instead.

7. Is LG Chem a reliable brand for industrial RO membranes?

Yes — LG Chem's NanoH2O Thin Film Nanocomposite membrane technology is used across major municipal and industrial utilities worldwide, backed by consistent, reliable performance in demanding applications.