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Value Units Test Method / Conditions Propylene Glycol Content 94 wt% Performance Additives Content 6 wt% Specific Gravity (at 15/15°C) 1.053 - 1.063 pH (50% Glycol) 9.5 - 10.5 Reserve Alkalinity min. 15.0 ml Recommended Use Temperature Range -45 to 160 °C
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- Freeze and Burst Protection at Various Temperatures
Typical Concentrations of DOWFROSTTM HD Heat Transfer Fluid Required to Provide Freeze and Burst Protection at Various Temperatures
Temperature (°C/°F) Percent DOWFROST™ HD Heat Transfer Fluid Concentration Required For Freeze Protection (Volume %) For Burst Protection (Volume %) -7 (20) 19.1 12.8 -12 (10) 30.9 21.3 -18 (0) 38.3 25.5 -23 (-10) 44.7 29.8 -29 (-20) 48.9 31.9 -34 (-30) 53.2 35.1 -40 (-40) 57.4 37.2 -46 (-50) 60.6 37.2 -51 (-60) 63.8 37.2 Note: These figures are examples only and may not be appropriate to your situation. Generally, for an extended margin of protection, you should select a temperature in this table that is at least 3°C (5°F) lower than the expected lowest ambient temperature. Inhibitor levels should be adjusted for solutions of less than 20% glycol.
- Typical Freezing and Boiling Points of DOWFROST™ HD Heat Transfer Fluid
Wt. % Propylene Glycol Vol. % Propylene Glycol Wt. % DOWFROST™ HD Heat Transfer Fluid Vol. % DOWFROST™ HD Heat Transfer Fluid Freezing Point (°C/°F) Boiling Point (°C/°F) Degree Brix² Refractive Index (22°C/72°F) 0 0 0 0 0 (32.0) 100.0 (212) 0 1.3328 5 4.8 5.3 5.1 -1.6 (29.1) 100.0 (212) 4.8 1.3383 10 9.6 10.7 10.2 -3.3 (26.1) 100.0 (212) 8.4 1.3438 15 14.5 16 15.4 -5.1 (22.9) 100.0 (212) 12.9 1.3495 20 19.4 21.3 20.6 -7.1 (19.2) 100.6 (213) 15.4 1.3555 25 24.4 26.6 26 -9.6 (14.7) 101.1 (214) 19 1.3615 30 29.4 31.9 31.3 -12.7 (9.2) 102.2 (216) 22 1.3675 35 34.4 37.2 36.6 -16.4 (2.4) 102.8 (217) 26.1 1.3733 40 39.6 42.6 42.1 -21.1 (-6.0) 103.9 (219) 29.1 1.379 45 44.7 47.9 47.6 -26.7 (-16.1) 104.4 (220) 31.8 1.3847 50 49.9 53.2 53.1 -33.5 (-28.3) 105.6 (222) 34.7 1.3903 55 55 58.5 58.5 -41.6 (-42.8) 106.1 (223) 38 1.3956 60 60 63.8 63.8 -51.1 (-59.9) 107.2 (225) 40.6 1.4008 65 65 69.1 69.1 b 108.3 (227) 42.1 1.4058 70 70 74.5 74.5 b 110.0 (230) 44.1 1.4104 75 75 79.8 79.8 b 113.9 (237) 46.1 1.415 80 80 85.1 85.1 b 118.3 (245) 48 1.4193 85 85 90.4 90.4 b 125.0 (257) 50 1.4235 90 90 95.7 95.7 b 132.2 (270) 51.4 1.4275 95 95 a a b 154.4 (310) 52.8 1.4315 - Typical properties, not to be construed as specifications.
- Degree Brix is a measure of the sugar concentration in a fluid and is important in fermentation and syrups applications. Although there is no sugar present in DOWFROST™ heat transfer fluids, the glycol affects the refractive index of the fluid in a similar fashion.
- Note: Generally for an extended margin of protection, you should select a temperature in this table that is at least 3°C (5°F) lower than the expected lowest ambient temperature. Inhibitor levels should be adjusted for solutions of less than 20% glycol.
- Saturation Properties at 30% Propylene Glycol Concentration
Saturation Properties of DOWFROSTTM HD Heat Transfer Fluid at 30% Propylene Glycol Concentration by Volume
Temperature (°C/°F) Specific Heat (kJ/(kg·K)) (Btu/lb·°F) Density (kg/m³) (lb./ft³) Thermal Conductivity (W/m·K) [Btu/hr·ft² (°F/ft)] Viscosity (mPa·s) (cps) 10 (50) 3.756 (0.898) 1043.85 (65.17) 0.4344 (0.2510) 4.5068 (4.51) 40 (104) 3.841 (0.918) 1029.85 (64.29) 0.4622 (0.2670) 1.6295 (1.63) 65 (149) 3.913 (0.935) 1014.87 (63.36) 0.4771 (0.2757) 0.9144 (0.91) 90 (194) 3.984 (0.952) 996.86 (62.23) 0.4846 (0.2800) 0.6040 (0.60) 120 (248) 4.070 (0.973) 971.26 (60.63) 0.4838 (0.2795) 0.4246 (0.42) - Saturation Properties at 40% Propylene Glycol Concentration
Saturation Properties of DOWFROST™ HD Heat Transfer Fluid at 40% Propylene Glycol Concentration by Volume
Temperature (°C/°F) Specific Heat (kJ/(kg·K)) (Btu/lb·°F) Density (kg/m³) (lb./ft³) Thermal Conductivity (W/m·K) [Btu/hr·ft² (°F/ft)] Viscosity (mPa·s) (cps) -20 (-4) 3.453 (0.825) 1066.76 (66.60) 0.3635 (0.2100) 48.9043 (48.90) 10 (50) 3.564 (0.852) 1055.38 (65.89) 0.3936 (0.2274) 7.2173 (7.22) 40 (104) 3.675 (0.878) 1039.77 (64.91) 0.4150 (0.2398) 2.2389 (2.24) 65 (149) 3.767 (0.900) 1023.55 (63.90) 0.4262 (0.2463) 1.1762 (1.18) 90 (194) 3.859 (0.922) 1004.39 (62.70) 0.4313 (0.2492) 0.7462 (0.75) 120 (248) 3.970 (0.949) 977.53 (61.03) 0.4294 (0.2481) 0.5084 (0.51) - Saturation Properties at 50% Propylene Glycol Concentration
Saturation Properties of DOWFROST™ HD Heat Transfer Fluid at 50% Propylene Glycol Concentration by Volume
Temperature (°C/°F) Specific Heat (kJ/(kg·K)) (Btu/lb·°F) Density (kg/m³) (lb./ft³) Thermal Conductivity (W/m·K) [Btu/hr·ft² (°F/ft)] Viscosity (mPa·s) (cps)
-30 (-22) 3.165 (0.756) 1081.98 (67.55) 0.3246 (0.1875) 172.8273 (172.83) -20 (-4) 3.210 (0.767) 1078.51 (67.33) 0.3336 (0.1917) 73.0193 (73.02) 10 (50) 3.346 (0.800) 1065.40 (66.51) 0.3560 (0.2057) 10.6481 (10.65) 40 (104) 2.481 (0.832) 1048.23 (65.44) 0.3716 (0.2147) 3.1103 (3.11) 65 (149) 3.564 (0.859) 1030.83 (64.35) 0.3792 (0.2191) 1.5483 (1.55) 90 (194) 3.707 (0.886) 1010.61 (63.09) 0.3821 (0.2208) 0.9339 (0.93) 120 (248) 3.843 (0.919) 982.63 (61.34) 0.3792 (0.2191) 0.6029 (0.60)