What Is Low-Pressure Equipment?
Low-pressure refrigeration equipment uses refrigerants that have a saturation pressure below 45 psia at 104 F. This definition is based on the refrigerant's thermodynamic properties, not the system's operating conditions. Any equipment charged with a refrigerant meeting this threshold is classified as low-pressure regardless of its actual operating pressures at any given moment.
Low-pressure refrigerants have a saturation pressure below 45 psia at 104 F.
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