R12 Ph Chart Pdf- [work] Jun 2026

Before the global phase-out of chlorofluorocarbons (CFCs) under the Montreal Protocol, R12 (dichlorodifluoromethane) was the undisputed king of refrigerants, serving in automotive air conditioning, domestic refrigerators, and commercial freezers for over half a century. While its production is now banned in most countries, understanding its thermodynamic behavior remains crucial for maintaining legacy systems and, more importantly, for grasping the fundamental principles of refrigeration. The primary tool for this understanding is the —a specialized logarithmic chart that visually encodes the refrigerant’s state, properties, and energy transformations. This essay argues that the R12 Ph chart is not merely a static data reference but a dynamic map that reveals the complete narrative of the vapor-compression refrigeration cycle.

R-12 is characterized by high stability and non-flammability National Refrigerants, Inc. Value (at 1 atm) Chemical Formula cap C cap C l sub 2 cap F sub 2 Dokuz Eylül Üniversitesi Boiling Point Hudson Technologies Critical Temperature Dokuz Eylül Üniversitesi Critical Pressure Dokuz Eylül Üniversitesi Safety Rating ASHRAE A1 (Non-toxic, non-flammable) Hudson Technologies Pressure-Temperature (P-T) Table R12 Ph Chart Pdf-