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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.
   
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).
Trade names and designations
Refrigerant R134a is currently available under the following trade designations: H-FKW 134a SUVA 134a ...

Effects on metal
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:

Removing and installing window slot outer seal
  Note   The core of the window slot outer seal is a metal insert.   If it is bent or distorted, the window slot outer seal cannot be straightened out anymore. It will remain ...

2-pack HS Optimum Plus clear coat
Designation: 2-pack HS Optimum Plus clear coat -LZK 769 K07 A5- Issued 04.2013 Product description 2-pack HS Optimum Plus clear coat is a VOC compliant high-solid clear coat. ...

Pressing tyre off wheel rim
New wheels with a modified contour have been introduced for all vehicles as of model year 2005. The tyre fitting unit must be furnished with the tyre fitting head designed for these wheels.   WA ...

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