Refrigerant R 404A Oct 17, 2024 0 comment blog Refrigerant R 404A efrigerant R 404A Application: Good replacement of R-22 & R-502 refrigerant. Refrigerant Gas R404A vapors have Similar PT and flow properties to R-502 Higher capacity than R-22, therefore requires TXV change Refrigerant Gas R404A. Description: Details