Bentley Volkswagen.Golf.Jetta.R32.Official.Factory.Repair.Manual.1999-2005

General information for A/C system
Página 3 de 19
Vapor pressure curve of refrigerant R134a
A - liquid
B - gaseous
D - Vapor pressure curve of refrigerant R134a
1 - Pressure acting on liquid in bar (absolute)
2 - Temperature in C
Vapor pressure table for refrigerant R134a
The vapor pressure table for every refrigerant is published
in literature for refrigeration system engineers. This table
makes it possible to determine the vapor pressure acting
on the column of liquid in a vessel if the temperature of the
vessel is known.
As there is a characteristic vapor pressure table for every
refrigerant, refrigerant can be identified by measuring
pressure and temperature.
Note:
- At absolute pressure, 0 bar corresponds to absolute
vacuum. Normal ambient pressure (positive pressure)
equals 1 bar absolute pressure. 0 pressure corresponds to
an absolute pressure of one bar on most pressure gauges
(indicated by -1 bar below 0).
Temperature in C Pressure in bar (positive pressure) of R134a
-45 -0.61
-40 -0.49
-35 -0.34
-30 -0.16
-25 0.06
-20 0.32
-15 0.63
-10 1.00
-5 1.43
0 1.92
5 2.49
10 3.13
15 3.90
20 4.70
25 5.63
30 6.70
35 7.83
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13/2/2005