Which refrigerant would typically be used in a low-pressure appliance?

The refrigerant typically used in low-pressure appliances is R-123. R-123, a hydrochlorofluorocarbon (HCFC), has a low boiling point and a low-pressure operation, making it suitable for systems such as centrifugal chillers and certain types of refrigeration and air conditioning units designed for lower pressure applications.

R-123 is favored in some industrial and commercial systems because it provides effective refrigeration performance at lower pressures compared to other refrigerants, which operate at higher pressures. This characteristic is particularly important because low-pressure appliances often require refrigerants that can function effectively without putting undue stress on the system components.

Understanding the specific applications and properties of each refrigerant is crucial for selecting the appropriate one for a given appliance.