Volkswagen Golf Service & Repair Manual: Vapour pressure
| In an enclosed container that is not completely full,
refrigerant evaporates as vapour at the surface in a quantity
sufficient to form an equilibrium between vapour and liquid.
This equilibrium develops under pressure and is often called
vapour pressure. The vapour pressure is temperature-dependant
→ Chapter. |
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| Physical properties of R134a |
| Because the vapour pressure curves of R134a and other
refrigerants are in part very similar, unique identification on
the basis of pressure alone is not possible. |
| The air conditioner compressor used for R134a is lubricated
with special synthetic refrigerator oils, such as PAG oils (polyalkylene
glycol oils). |
|
Refrigerant R134a is currently available under the following
trade designations:
H-FKW 134a
SUVA 134a
...
In its pure state, refrigerant R134a is chemically stable
and does not attack iron or aluminium.
However, impurities such as chlorine compounds in th ...
Other materials:
Releasing gas from gas strut
–
Clamp gas strut in vice in area x = 50 mm.
WARNING
Wear eye protection when sawing.
Cover area of saw cut with a cloth.
...
Battery
Battery - general notes
Note
All instructions and notes regarding this chapter are
available under
→ Electrical System, General Information; Rep. gr.27.
...
Removing and installing oil pressure regulating valve -N428-
Removing
Note
Fit all heat insulation sleeves in the original position
when installing.
–
Remove noise insulation
→ General body repairs, exterior; Rep. gr.66.
...
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Trade names and designations
Effects on metal