R-404A Pressure-Temperature Chart
R-125 / R-143a / R-134a (44% / 52% / 4% by mass). Standard saturation pressures across evaporator, suction, and condensing temperatures.
Nominal Glide: about 0.8 °F (0.4 °C) at typical evaporator and condenser conditions
R-404A is a near-azeotropic blend with a small temperature glide of about 0.8 °F (0.4 °C). Because the bubble and dew split exceeds 1 psi across operating temperatures, separate bubble (liquid) and dew (vapor) saturation pressures are provided for accurate superheat and subcooling calculations.
psig = psia − 14.696 (standard atmospheric pressure at sea level). At higher elevations, adjust gauge manifold readings accordingly.
Other Refrigerant PT Charts
R-32 / R-1234yf (68.9% / 31.1% by mass)
Pure difluoromethane (CH2F2, 100%)
R-32 / R-125 (50% / 50% by mass)
R-32 / R-125 / R-1234yf / R-134a / R-1234ze (26% / 26% / 20% / 21% / 7% by mass)
R-125 / R-143a (50% / 50% by mass)
Calculate superheat and subcooling for R-404A, R-32, and R-410A.