DOWFROST 35 HEAT TRANSFER FLUID

DOWFROST 35 HEAT TRANSFER FLUID is a heat transfer fluid with the chemical name propylene glycol. It is used in HVAC applications and pipes, providing functions such as defrosting, deicing, dehumidifying, burst protection, and freeze protection, and features corrosion resistance and suitability for food contact.

RTU Product Type: Heat Transfer Fluid

Application Area: HVAC Applications, Pipes

Features: Burst Protection, Corrosion Resistant, Defrosting, Dehumidifying, Deicing, Food Contact Acceptable, Freeze Protection

Synonyms: (±)-1,2-Propanediol, (±)-Propylene glycol, (RS)-1,2-Propanediol, 1,2-(RS)-Propanediol, 1,2-Dihydroxypropane, 1,2-Propanediol, 1,2-Propylene glycol, 2-Hydroxypropanol, 2,3-Propanediol, DL-1,2-Propanediol, dl-Propylene glycol, Isopropylene glycol, Methylethyl glycol, Methylethylene glycol, Monopropylene glycol, NSC 69860, α-Propylene glycol

    Enhanced TDS

    Identification & Functionality

    Chemical Name
    Propylene Glycol
    RTU Product Type
    Heat Transfer Fluid
    Tilley Product Number
    11825-01
    Technologies
    Ready-to-Use Products
    Product Families
    Ready-to-Use Products — Fluids & Lubricants
    Heat Transfer Fluids

    Features & Benefits

    Ready-to-Use Product Features
    Burst Protection,
    Corrosion Resistant,
    Defrosting,
    Dehumidifying,
    Deicing,
    Food Contact Acceptable,
    Freeze Protection

    Applications & Uses

    Markets
    Building & Construction
    Applications
    Building & Construction — Building Materials
    Pipes & Plumbing
    Application Area
    HVAC Applications,
    Pipes

    Technical Details & Test Data

    Technical Details

    Typical Concentrations of DOWFROST™ Heat Transfer Fluid Required to Provide Freeze and Burst Protection at Various Temperatures

    Temperature Percent DOWFROST™ Heat Transfer Fluid Concentration Required
    °C (°F) For Freeze Protection Volume %

    For Burst Protection Volume %
    -7 (20) 18.8 12.6
    -12 (10) 30.4 20.9
    -18 (0) 37.7 25.1
    -23 (-10) 44.0 29.3
    -29 (-20) 48.2 31.4
    -34 (-30) 52.4 34.6
    -40 (-40) 56.5 36.6
    -46 (-50) 59.7 36.6
    -51 (-60) 62.8 36.6

    Typical Freezing and Boiling Points of DOWFROST™ Heat Transfer Fluid1

            Freezing Point      
    Wt. % Propylene Glycol Vol. % Propylene Glycol Wt. % DOWFROST™ Heat Transfer Fluid Vol. % DOWFROST™ Heat Transfer Fluid °C Boiling Point °C at 101 kPa Degree Brix²

    Refractive Index 22°C
    0.0 0.0 0.0 0.0 0 100 0 1.3328
    5.0 4.8 5.2 5.2 -1.6 100 4.8 1.3383
    10.0 9.6 10.5 10.0 -3.3 100 8.4 1.3438
    15.0 14.5 15.7 15.1 -5.1 100 12.9 1.3495
    20.0 19.4 20.9 20.3 -7.1 100.6 15.4 1.3555
    25.0 24.4 26.1 25.5 -9.6 101.1 19 1.3615
    30.0 29.4 31.4 30.7 12.7 102.2 22 1.3675
    35.0 34.4 36.6 36.0 16.4 102.8 26.1 1.3733

    Typical Freezing and Boiling Points of DOWFROST™ Heat Transfer Fluid (Cont.)
     

            Freezing Point      
    Wt. % Propylene Glycol Vol. % Propylene Glycol Wt. % DOWFROST™ Heat Transfer Fluid Vol. % DOWFROST™ Heat Transfer Fluid °C Boiling Point °C at 101 kPa Degree Brix

    Refractive Index 22°C
    40.0 39.6 41.8 41.4 -21.1 103.9 29.1 1.379
    45.0 44.7 47.0 46.7 -26.7 104.4 31.8 1.3847
    50.0 49.9 52.3 52.2 -33.5 105.6 34.7 1.3903
    55.0 55.0 57.5 57.5 -41.6 106.1 38 1.3956
    60.0 60.0 62.7 62.7 -51.1 107.2 40.6 1.4008
    65.0 65.0 68.0 68.0 a 108.3 42.1 1.4058
    70.0 70.0 73.2 73.2 a 110 44.1 1.4104
    75.0 75.0 78.4 78.4 a 113.9 46.1 1.415
    80.0 80.0 83.6 83.6 a 118.3 48 1.4193
    85 85.0 88.9 88.9 a 125 50 1.4235
    90.0 90.0 94.1 94.1 a 132.2 51.4 1.4275
    95.0 95.0 99.3 99.3 a 154.4 52.8 1.4315

    Saturation Properties of DOWFROST™ Heat Transfer Fluid at 30% Propylene Glycol Concentration by Volume

    Temperature Specific Heat Density Thermal Conductivity Viscosity
    °C kJ/(kg)(K) kg/m3 W/mK mPa•s
    -10 3.821 1033.71 0.4344 4.5068
    40 3.903 1019.56 0.4622 1.6295
    65 3.972 1004.26 0.4771 0.9144
    90 4.041 985.77 0.4846 0.604
    120 4.123 959.35 0.4838 0.4246

    Saturation Properties of DOWFROST™ Heat Transfer Fluid at 50% Propylene Glycol Concentration by Volume

    Temperature Specific Heat Density Thermal Conductivity Viscosity
    °C kJ/(kg)(K) kg/m3 W/mK mPa•s
    -30 3.339 1064.83 0.3246 172.8273
    -20 3.378 1061.71 0.3336 73.0193
    10 3.493 1049.25 0.3560 10.6481
    40 3.609 1032.17 0.3716 3.1103
    65 3.706 1014.40 0.3792 1.5483
    90 3.802 993.42 0.3821 0.9339
    120 3.918 964.00 0.3792 0.6029