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

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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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