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WINTREX® HD heat transfer fluid is an inhibited ethylene glycol designed for use in hydronic systems for freeze and corrosion protection. WINTREX® HD is designed to extend fluid life where service temperatures are higher and the likelihood of thermal degradation is greater. It is sometimes also used in less demanding applications because the heavy duty inhibitors last longer, and maintenance requirements can be reduced.

Product Type: Heat Transfer Fluid

Compatible Substrates & Surfaces: Aluminum, Metal

Features: Corrosion Resistant, Cost Effective, Freeze Resistant, Improved Heat Transfer Efficiency, Long Shelf Life

Chemical Family: Mixtures & Blends

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Knowde Enhanced TDS

Identification & Functionality

Chemical Family
Heat Transfer Fluid Type

Features & Benefits

Products Highlights

The effectiveness of WINTREX® HD heat transfer fluid in preventing corrosion has been proven both in use and in laboratory testing. Using WINTREX® HD in place of brine solutions or uninhibited glycol/water solutions lowers maintenance costs and improves heat transfer efficiency.
WINTREX® HD includes a fluorescent yellow dye, for leak detection. WINTREX® HD is designed to protect components commonly found in residential and commercial systems. WINTREX® HD can also be used with aluminum at temperatures below 150°F (66°C). At temperatures above 150°F (66°C), use of WINTREX® HD is not recommended because the inhibitors will not fully protect aluminum components in the system. WINTREX® should not be used with galvanized steel.

Applications & Uses

Markets
Compatible Substrates & Surfaces
Recommended Use Temperature Range

-60°F (-51°C) to 350°F (177°C)

Properties

Physical Form
Appearance
Liquid, Clear, Fluorescent Yellow
Typical Properties
ValueUnitsTest Method / Conditions
Ethylene Glycol92.0%-
Performance Additives and Water8.0%-
Specific Gravity (15/15°C 60/60°F)1.133 - 1.143--
pH (50% glycol)9.0 - 10.5--
Reserve Alkalinitymin. 23--
Freeze Point Max (as 50%)-34 / -37°F(°C)-
Typical Properties by Concentration

Properties1 Conc. 60% 50% 40% 35% 30% 25%
Ethylene Glycol 92% 60% 50% 40% 35% 30% 25%
Performance
Additives and Water
8% 40% 50% 60% 65% 70% 75%
Specific Gravity
(15/15°C 60/60°F)
1.133 - 1.143 1.092 - 1.119 1.076 - 1.105 1.06 - 1.091 1.059 - 1.075 1.050 - 1.067 1.040 - 1.059
pH 50% glycol 9.0 - 10.5 9.0 - 10.5 9.0 - 10.5 9.0 - 10.5 9.0 - 10.5 9.0 - 10.5 9.0 - 10.5
Reserve Alkalinity (min) 23 14 12 9 8 7 6
Freeze Point Max -34°F / -37°C
(as 50%)
-63°F / -53°C -34°F / -37°C -10°F / -23°C -4°F / -18°C 4°F / -15°C 10°F / -12°C

 

1 Concentrate based on volume of Ethylene Glycol, mixtures based on volume of WINTREX HD