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Appendix 16 (DOWFROST HD Specifications)

Typical Concentrations of DOWFROST HD Fluid

Required to Provide Freeze and Burst Protection

at Various Temperatures

Percent DOWFROST HD Fluid

Concentration Required

Temperature For Freeze Protection For Burst Protection

°C (°F) Volume % Volume %

-7 (20) 18 12

-12 (10) 29 20

-18 (0) 36 24

-23 (-10) 42 28

-29 (-20) 46 30

-34 (-30) 50 33

-40 (-40) 54 35

-46 (-50) 57 35

-51 (-60) 60 35

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. Contact Dow for information on specific cases or further assistance.

ATT E N TION: These are typical numbers only and are not to be regarded as specifications. As use

conditions are not within its control, Dow does not guarantee results from use of the information or

products herein; and gives no warranty, express or implied.

Product Information

DOWFROST HD

Inhibited Propylene Glycol-based Heat Transfer Fluid

DOWFROST* HD heat transfer fluid is a

formulation of 94.0 percent propylene glycol

and a specially designed package of

industrial corrosion inhibitors. The fluid is

dyed bright yellow to aid in leak detection.

Solutions in water provide freeze protection

to below -50°C (-60°F) and burst protection

to below -73°C (-100°F).

Recommended use temperature range:

-45°C (-50°F) to 160°C (325°F)

Suitable applications: single fluid process

heating and cooling, closed-loop, water-

based HVAC applications where propylene

glycol solutions are preferred or required.

For health and safety information for this

product, contact your Dow sales represen-

tative or call the number for your area on

the second page of this sheet for a Material

Safety Data Sheet (MSDS).

*Trademark of The Dow Chemical Company

0.0 0.0 0.0 0.0 0 (32.0) 100.0 (212) 0.0 1.3328

5.0 4.8 5.3 5.1 -1.6 (29.1) 100.0 (212) 4.8 1.3383

10.0 9.6 10.7 10.2 -3.3 (26.1) 100.0 (212) 8.4 1.3438

15.0 14.5 16.0 15.4 -5.1 (22.9) 100.0 (212) 12.9 1.3495

20.0 19.4 21.3 20.6 -7.1 (19.2) 100.6 (213) 15.4 1.3555

25.0 24.4 26.6 26.0 -9.6 (14.7) 101.1 (214) 19.0 1.3615

30.0 29.4 31.9 31.3 -12.7 (9.2) 102.2 (216) 22.0 1.3675

35.0 34.4 37.2 36.6 -16.4 (2.4) 102.8 (217) 26.1 1.3733

40.0 39.6 42.6 42.1 -21.1 (-6.0) 103.9 (219) 29.1 1.3790

45.0 44.7 47.9 47.6 -26.7 (-16.1) 104.4 (220) 31.8 1.3847

50.0 49.9 53.2 53.1 -33.5 (-28.3) 105.6 (222) 34.7 1.3903

55.0 55.0 58.5 58.5 -41.6 (-42.8) 106.1 (223) 38.0 1.3956

60.0 60.0 63.8 63.8 -51.1 (-59.9) 107.2 (225) 40.6 1.4008

65.0 65.0 69.1 69.1 b 108.3 (227) 42.1 1.4058

70.0 70.0 74.5 74.5 b 110.0 (230) 44.1 1.4104

75.0 75.0 79.8 79.8 b 113.9 (237) 46.1 1.4150

80.0 80.0 85.1 85.1 b 118.3 (245) 48.0 1.4193

85.0 85.0 90.4 90.4 b 125.0 (257) 50.0 1.4235

90.0 90.0 95.7 95.7 b 132.2 (270) 51.4 1.4275

95.0 95.0 a a b 154.4 (310) 52.8 1.4315

†

Typ ic a l pr o pe rti es, no t to b e c on st ru ed as s pe c if ic at i on s.

††

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.

Propylene glycol concentrations greater than 94% are not attainable with DOWFROST HD fluid.

Freezing points are below -50°C (-60°F).

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. Contact Dow for information on specific cases or further

assistance.

Wt. % Vol. %

Freezing

Boiling Point

Refractive

Propylene Propylene Wt. % Vol. % Point °C @ 101 kPa Degree Index

Glycol Glycol DOWFROST HD DOWFROST HD

°C (°F)

(°F@ 760 mmHg)

Brix

††

22°C (72°F)

Typical Freezing and Boiling Points of DOWFROST HD Fluid

†

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