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
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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). |
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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:
Assembly overview – Brake system pressure accumulator -VX70-, RHD vehicles
1 -
Brake system pressure accumulator -VX70-
Removing and installing
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2 -
Brake line
To hydraulic unit
With thread M12 x 1
14 Nm
3 -&nbs ...
Assembly overview - crankcase breather system
1 -
Hose
For crankcase breather
2 -
Cover
For oil separator
3 -
Oil separator
Removing and installing
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Renew if damaged
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O-ring
Use only O-rings that are resistant to refrigerant R134a and
related refrigerant oils. O-rings are no longer colour-coded.
Coloured and black O-rings are used.
Check that the O-rings used have the correct internal
diameters.
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