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Coolant agent R134a > < Pressure and boiling point
Vapour pressure table for refrigerant R134a
Vapour pressure table for refrigerant R134a
The vapour pressure table for each refrigerant is published in the literature for refrigeration engineers. This table shows the vapour pressure exerted on the liquid column in the container for a given temperature of the container.
Since a characteristic vapour pressure table is known for every refrigerant, one can determine what refrigerant is present by measuring pressure and temperature.
  Note
Absolute pressure means that 0 bar corresponds to an absolute vacuum. The normal ambient pressure (positive pressure) corresponds to 1 bar absolute pressure. In general, most manometer scales represent atmospheric pressure as 0 bar, meaning an absolute pressure of 1 bar (this can be recognized if there is a -1 on the scale).
   
Temperature in ° CPressure in bar (positive pressure) R134a
-45-0,61
-40-0,49
-35-0,34
-30-0,16
-250,06
-200,32
-150,63
-101,00
-51,43
01,92
52,49
103,13
153,90
204,70
255,63
306,70
357,83
409,10
4510,54
5012,11
5513,83
6015,72
6517,79
7020,05
7522,52
8025,21
8528,14
9031,34

   

Coolant agent R134a > < Pressure and boiling point