Volkswagen Golf Service & Repair Manual: High-pressure safety valve

Volkswagen Golf Service & Repair Manual / Air conditioning system with refrigerant R134a / General information on refrigerant circuit / Refrigerant circuit components / High-pressure safety valve

The high-pressure safety valve is fitted to the air conditioner compressor or the receiver.

The valve opens at a pressure above approx. 38 bar and closes again when the pressure has dropped (approx. 30 bar).

Not all the refrigerant is lost from the system.

Depending on the version, a transparent plastic disc may be fitted, which breaks when the valve opens.

High-pressure safety valve

Pipes and hoses in refrigerant circuit

The mixture of refrigerant oil and refrigerant R134a attacks certain metals (e.g. copper) and alloys and dissolves certain hose materials. Therefore, always use genui ...

Design of refrigerant circuit

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Other materials:

Adjusting glass panel
Special tools and workshop equipment required Height-adjustment of glass panel Torque wrench -V.A.G 1783- – Loosen securing bolts for ...

Vapour pressure table for refrigerant R134a
The vapour pressure table for each refrigerant is published in the literature for refrigeration engineers. This table shows the vapour pressure exerted on the liquid column in the container for a given temperature of the container. Since ...

Function
Fig. 127 In the stowage compartment on the front passenger side: toll card reader First read and observe the introductory information and safety warnings Using the toll card system Switch on the navigation system and insert a suitable ETC card in the toll card reader (arrow). The de ...