Refrigerants - Temperature and Pressure at Constant Boiling

The relation between temperatures and boiling pressuress for 

• R-717 : Ammonia
• R-134a : Tetrafluoroethane
• R-22 : Hydrochlorofluorocarbon
• R-507 :
• R-290 : Propane
• R-744 : CO₂

are indicated in the diagrams below:

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