Posts Tagged: AC O-rings

AC O-rings

AC O-rings for R-134a systems Replacement Auto AC O-rings When car makers used R-12 as the refrigerant and mineral oil as the lubricant in auto AC systems, they often used neoprene AC O-rings and gaskets. Neoprene and Buna O-rings worked well in those R-12 applications. But as R-12 was phased out and R-134a took its place, they found the neoprene and Buna O-rings didn’t hold up as well. So they switched to HNBR green O-rings. What are Buna O-rings? Buna o-rings (NBR or nitrile rubber o-rings) are similar to neoprene … Read More