Cellulose Triacetate
What is CTA (Cellulose Triacetate)?
CTA stands for Cellulose Triacetate. An older membrane chemistry that tolerates free chlorine — useful for chlorinated municipal feed or systems that sanitize between batches. Lower rejection than TFC.
Related glossary terms
- TFC
Hi-Tech's standard membrane chemistry — an ultrathin polyamide barrier on a polysulfone support, on a polyester web. High rejection, high flux, intolerant of free chlorine.
- HR
Membrane variant tuned for higher salt-rejection (typically 99.5% or better), at a small cost in permeate flow.
- HRLE
A combined variant — the rejection of an HR element with the lower operating pressure of an LE element. Useful where both targets matter.