There was a download of LewaPlus 2.1.10 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. LewaPlus works fine with 32-bit versions of Windows XP/7/8/10/11.
The following versions: 2.0, 1.9 and 1.8 are the most frequently downloaded ones by the program users. We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. Lewaplus.exe or lwlaunch.exe are the common file names to indicate the LewaPlus installer. This program was originally created by LANXESS. The software lies within Education Tools, more precisely Science Tools.
From the developer:
LewaPlus is a comprehensive design tool for ion exchange resin (IX) and Reverse Osmosis (RO) membrane systems. It allows the dimensioning of IX and RO systems under a variety of system configurations, including some unique process configurations only available with Lewatit and Lewabrane product technology.
You may want to check out more software, such as Solmetric SunEye, DOFMaster or GASEQ, which might be related to LewaPlus.