RO membranes

[reefermadness]

Originally Posted by StirCrazy

um, DOW doesn't make a 150, they also don't make membrains that the part number starts with TF. the DOW membrains that most of us use are
TW30-1812-GPD (24,36,50,75,and 100)

so you have managed to show a info sheet for a non dow product.

Steve

Apparently I did. I didnt realize that the 100gpd and 150gpd membranes that BRS sells are not dow filmtec. I got that spec sheet from their website.

How ever my understanding still is that all membranes must be used at the spec pressure to achieve the best rejection rate. You can up the pressure but you will see a decrease in the rejection rating.

You are right that all dow membranes are spec at 50psi. The 100gpd has a poorer rejection rating though, and they don't make a 150gpd.