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NuTherm™ HC-20 High performance, Potassium Formate/Water-based closed system heat transfer fluid ideal for low temperature applications

  • Heat transfer in open system
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Part Number: nt-hc20
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Specifications
  • Primary Application: Heat transfer fluid
  • Water based: Yes
  • Key ingredient: Potassium Formate
  • Specific Gravity (g/cm3): 1.237
  • Boiling Point: 110°C (230°F)
  • Freezing Point: -30°C (-22°F)
  • Lowest Op. Temp.: -20°C (-4°F)
  • System: Closed
Description:
NuTherm™ HC-20 is a high-performance heat transfer fluid designed as an alternative to less effective glycol, PAG, and Calcium Chloride open bath fluids.  NuTherm HC-20 is non-toxic, non-flammable, and has a robust corrosion inhibition package making it ideal for use in closed systems down to -20°C (-4 °F) and up to 218 °C (425 °F). 

NuTherm HC-20 has superior thermophysical properties in comparison to traditional closed system heat transfer fluids, including higher thermal conductivity and specific heat, as well as lower viscosity, making it an extraordinarily more efficient closed system coolant within its operational temperature range.  NuTherm HC-20 is non-hazardous, biodegradable, CFC-free, antimicrobial, and has exceptional thermal stability at high temperatures in comparison to glycols, PAG’s, Calcium Chloride, Trichloroethylene and Methylene Chloride (Dichloromethane) making it an intelligent alternative.  NuTherm HC-20 is formulated with a incredibly robust and efficient corrosion inhibition package, allowing the product to be used on most metals including Stainless Steel, Carbon Steel, Cast Steel, Copper and its alloys (Brass & Bronze), Monel, Nickel, Hastelloy, Inconel, Tantalum, Titanium, Titanium alloys (Ti6Al4V), Aluminium and Cast Iron.  Do not use on Zinc, Zinc-plated or galvanized metals, Magnesium.  NuTherm HC-20 corrosion tests at 80 °C show incredible results of x mmpy (x mpy) on C260 Brass alloys, x mmpy (x mpy) on 304L Stainless Steel, and x mmpy (x mpy) on AL1100 Aluminium.  NuThem HC-20 does not produce pitting corrosion on Aluminium alloys like other Potassium Formate open bath heat transfer fluids.

*mmpy = millimeters per year; mpy = mils per year (1 mil = 0.001 inch); In general, uniform corrosion rates less than 2 mpy are acceptable for most applications.  Corrosion rates between 2 and 10 mpy are considered marginal and may impact useful life of the equipment.  Corrosion rates greater than 10 Mils per year are unacceptable.

NuTherm HC-20  
BULK DENSITY 9.93 #/gal
SPECIFIC GRAVITY @ 20 °C 1.190 g/cm³  
TEMPERATURE RANGE (CLOSED SYSTEM) -10 to 218°C (14 to 425°F)
THERMAL STABILITY HIGH
ODOR ODORLESS  
FLASH POINT (°C) NONE
FIRE POINT (°C) NONE
MELTING POINT / FREEZING POINT   -20°C (-58°F)  
BOILING POINT   108°C (226°F)
pH    8.0 to 8.5
APPEARANCE and COLOR    CLEAR, COLORLESS to AMBER
 
Temperature (°F) Viscosity (cPs) Thermal Conductivity (BTU/hr•ft•°F) Specific Heat (BTU/lb•°F) Density (lb/ft3)
14 3.00 0.291 0.776 75.0
20 2.80 0.293 0.778 74.9
40 2.30 0.299 0.784 74.6
60 1.90 0.306 0.791 74.3
80 1.60 0.312 0.797 74.0
90 1.50 0.316 0.801 73.8
100 1.40 0.319 0.804 73.6
120 1.20 0.326 0.811 73.3
140 1.00 0.332 0.817 73.0
160 0.90 0.339 0.824 72.7
180 0.79 0.345 0.830 72.4
200 0.71 0.352 0.837 72.1
220 0.63 0.358 0.843 71.8
240 0.57 0.365 0.850 71.5
260 0.52 0.371 0.857 71.1
280 0.47 0.378 0.863 70.8
300 0.44 0.384 0.870 70.5
320 0.40 0.391 0.876 70.2
340 0.37 0.397 0.883 69.9
360 0.34 0.404 0.890 69.6
380 0.32 0.410 0.896 69.3
400 0.30 0.417 0.903 68.9
420 0.28 0.424 0.909 68.6
425 0.28 0.425 0.911 68.6
 
Temperature (°C) Viscosity (mPa•s) Thermal Conductivity (W/m•K) Specific Heat (kJ/kg•K) Density (kg/m3)
-10 3.00 0.494 3.246 1204
-0 2.50 0.504 3.271 1199
10 2.10 0.514 3.296 1195
20 1.80 0.524 3.320 1190
30 1.50 0.534 3.345 1186
40 1.30 0.544 3.370 1181
50 1.20 0.554 3.395 1177
60 1.00 0.564 3.420 1172
70 0.91 0.574 3.444 1167
80 0.81 0.584 3.469 1163
90 0.73 0.594 3.494 1158
100 0.66 0.604 3.519 1154
110 0.60 0.614 3.544 1149
120 0.55 0.624 3.568 1145
130 0.51 0.634 3.593 1140
140 0.47 0.644 3.618 1136
150 0.43 0.654 3.643 1131
160 0.40 0.664 3.668 1127
170 0.37 0.674 3.692 1122
180 0.35 0.684 3.717 1118
190 0.33 0.694 3.742 1113
200 0.31 0.704 3.767 1109
210 0.29 0.714 3.792 1104
218 0.28 0.722 3.811 1101

Vapor Pressure
Temperature (°C) Temperature (°F) Vapor Pressure (psia)
20 68 0.33
30 86 0.42
40 104 0.69
50 122 1.24
60 140 2.16
70 158 3.57
80 176 5.62
90 194 8.47
100 212 12.3
110 230 17.4
120 248 24.0
130 266 32.4
140 284 43.1
150 302 56.6
160 320 73.3
170 338 93.9
180 356 119.0
190 374 149.6
200 392 186.5
210 410 230.6
218 424 271.9

Gasket & Polymer Compatibility
Material Compatibility
Nitrile / NBR Excellent to 150°F, Good above 150°F
Hydrogenated Nitrile / HNBR Excellent
Ethylene Propylene / EP, EPDM Excellent
Chloropropene Good
Isobutylene / IIR Latex Good
Synthetic Isoprene / NR (Natural Rubber) Good / Excellent
Natural Isoprene / NR (Natural Rubber Good / Excellent
Chemraz Kalrez / FFKM Excellent
PTEF / FEP (Teflon) Excellent
Gylon® Style 3500,3504, 3510*** Excellent
Nylon / Polyamide Good / Excellent
Polyvinyl Chloride / PVC Good / Excellent
Polyethylene Excellent
Polypropylene Excellent
Epoxy Good / Excellent
Graphite Excellent

Metals Compatibility (Closed System)
Material Compatibility
Aluminium* Compatible
Cast Steel Compatible
Monel Compatible
Brass Compatible
Copper Compatible
Nickel Compatible
Bronze Compatible
Hastelloy Compatible
Stainless Steel Compatible
Carbon Steel Compatible
Inconel Compatible
Tantalum Compatible
Cast Iron* Compatible
Incoloy 825 Compatible
Titanium Compatible
Ti6Al4V Compatible
Zinc** Incompatible
Zinc Plating** Incompatible
Galvanized Surfaces** Incompatible
Magnesium** Incompatible

*Recommended for use only in closed, airtight systems that have been purged with an inert gas, such as Nitrogen, in the headspace. 

**May be used for support framing, electrical conduit, and structural components.  If product spills or splashes on any metals, rinse immediately with water to prevent surface discoloration.

***Gylon® is a registered trademark of Garlock which is an Enpro Industries, Inc. company.

NuTherm™ HC-20 high-performance heat transfer fluid designed as an alternative to less effective glycol, PAG, and Calcium Chloride open bath fluids.