Sundance Duster L4-153 2.5L VIN K FI (1992)
High Pressure Safety Valve HVAC: Description and Operation
W/ Fixed Displacement Compressor
High Pressure Relief Valve
DESCRIPTION
The High Pressure Relief Valve is located at the discharge line on the compressor. Its function is to prevent damage to the air conditioning system
in the event that excessive pressure develops due to condenser air flow being restricted, an overcharge of refrigerant or air and moisture in the
system.
OPERATION
The high pressure relief valve vents only a small amount of refrigerant necessary to reduce system pressure and then reseats itself. The majority of
the refrigerant is conserved in the system. The valve is calibrated to vent at a pressure of 3100 to 4140 kPa (450 to 600 psi), therefore, the fact
that the valve vented refrigerant, does not mean the valve is defective.
