the pressure range of the r1150 diagramm is to tight. you start at 7 bar, but you should go down to 0.1 bar or 0.5 (absolute).

same for r774 and r23

kPa diagrams are not important because its just the [bar] value times 100. MPa is also more often used in HVAC than kPa. I think Pa in deep vacuums and MPa in normal refrigeration.

but i like the nice overview!