What does RO membrane mean in practice?
The volute element splits the feed into permeate and concentrate and is rated for capacity under specified test conditions.
When does it matter?
Comparing only GPD ignores pressure, temperature and nominal retention, which determine quality in a real installation.
Which solutions are related to it?
The type of membrane is selected for salinity and pressure, a compatible restrictor is used, and the salt rejection percentage is periodically calculated.