Refrigerants of compounded compounds can fractionate; we recommend keeping the valve in a cabinet above freezing. Also these refrigerants can have “Glide” when one of the components boils before another. Valves operated near these flash points may have shifting problems. For specific information, contact PE Valve. Refrigerants R-12 134a (R-134a) MP39 (R-401a) 409A (R-409a) R-500 MP66 (R-401B) […]