Lewatit® CNP 80 WS is a weakly acidic, macroporous, acrylic-based cation exchange resin of special bead size distribution used in modern counter-current regenerated systems. Due to its very high total and perating capacity, excellent chemical and mechanical stability together with high resistance to osmotic shock, it is preferable used for dealkalization. The arrangement with strong dissociated cation exchanger (Lewatit® MonoPlus S 108), in demineralization units (e.g. Lewatit® VWS System) leads to higher regeneration efficiency.