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High Pressure Safety Valve HVAC: Service and Repair

A/C COMPRESSOR PRESSURE RELIEF VALVE

An A/C compressor pressure relief valve is incorporated in the manifold and tube assembly to:
- relieve unusually high refrigerant system discharge pressure buildups, (3103 kPa [450 psi] and above).
- prevent damage to the A/C compressor and other system components.
- avoid total refrigerant loss by closing after the excessive pressure has been relieved.