R600A (Isobutane) pressure enthalpy chart. Scroll down to find download buttons for pressure enthalpy charts in either Metric or Imperial Units. Downloads as a PDF.
These charts were provided courtesy of Danfoss, using their FREE CoolSelector 2 software. You can download that software free of charge also using this link.
 Pressure Enthalpy Chart. Download a PDF copy of the pressure enthalpy chart for both Metric and Imperial Units.){kind=link}