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:

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Vehicle diagnostic, testing and information systems
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