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Temperature in °C Pressure in Bar (Positive Pres‐
sure) 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
40 9.10
45 10.54
50 12.11
55 13.83
60 15.72
65 17.79
70 20.05
75 22.52
80 25.21
85 28.14
90 31.34
1.1.4 Handling Refrigerant
If refrigerant vessels are opened, the contents may escape in liq‐
uid or vapor form. This process is intensified the higher the
pressure in the vessel.
The pressure level is governed by two factors:
• The type of refrigerant in the vessel. The lower the boiling
point, the higher the pressure.
• The temperature level. The higher the temperature, the higher
the pressure.
WARNING
♦ There is a danger of ice-up.
♦ The refrigerant can then escape as a fluid or vapor.
♦ Do not open containers, which store refrigerant.
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
1. General Information 5
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