R134a is a new type of refrigerant, its standard boiling point is -26.5°C; R134a is safe, colorless, odorless, non-flammable, non-explosive, basically non-toxic, and chemically stable; R134a has a large latent heat of vaporization and is more stable Large autoclave capacity and good refrigeration capacity; large saturated gas volume, small mass flow of refrigerant in the same displacement compressor; high thermal conductivity, good heat transfer performance; low viscosity, good fluidity; no effect on the ozone layer The damage and greenhouse effect are smaller than R22. R134a has a relatively small corrosive effect on metals, good stability, and is insoluble in water, but R134a is insoluble in mineral oil, so POE or PAG lubricants are required.
R290 is a new type of environmentally friendly refrigerant, mainly used in central air conditioners, heat pump air conditioners, household air conditioners and other small refrigeration equipment.
R32 is a HFC refrigerant, used as a replacement for R410A in low temperature refrigeration and air conditioning applications. This refrigerant is a preferred replacement for R410A in new equipment. R32 is not to be used as a retrofit.