Sealing A/C systems

Choosing the right automotive tube joint seal for HFO-1234yf refrigerant compatibility.

In 2011, the U.S. EPA (Environmental Protection Agency) approved HFO (hydrofluoro-olefin)-1234yf refrigerant to replace the HFC (hydrofluorocarbon)-134a refrigerant currently used in most U.S. automotive air-conditioning systems. The HFO-1234yf refrigerant has a GWP (Global Warming Potential) 335 times less than its predecessor. Japan and Europe had previously approved use of the new refrigerant for automotive A/C systems. It appears likely that HFO-1234yf will become the new global standard for environmentally friendly refrigeration.

Invented jointly by Honeywell and DuPont, the new chemistry has undergone extensive vetting to ensure not only environmental performance but also the ability to meet critical automotive industry standards for toxicity, flammability, system performance, durability, and material compatibility.