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NuTherm™ HC-50 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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Specifications
  • Primary Application: Heat transfer fluid
  • Water based: Yes
  • Key ingredient: Potassium Formate
  • Specific Gravity (g/cm3): 1.341
  • Boiling Point: 118°C (244°F)
  • Freezing Point: -55°C (-67°F)
  • Lowest Op. Temp.: -51°C (-60°F)
  • System: Closed
Description:
NuTherm™ HC-50 is a high-performance heat transfer fluid designed as an alternative to less effective glycol, PAG, and Calcium Chloride open bath fluids.  NuTherm HC-50 is non-toxic, non-flammable, and has a robust corrosion inhibition package making it ideal for use in closed systems down to -50°C (-58 °F) and up to 218 °C (425 °F). 

NuTherm HC-50 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-50 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-50 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-50 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-50 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-50  
BULK DENSITY 11.19 #/gal
SPECIFIC GRAVITY @ 20 °C 1.341 g/cm³  
TEMPERATURE RANGE (CLOSED SYSTEM) -51 to 110°C (-60 to 230°F)
THERMAL STABILITY HIGH
ODOR ODORLESS  
FLASH POINT (°C) NONE
FIRE POINT (°C) NONE
MELTING POINT / FREEZING POINT   -55°C (-67°F)  
BOILING POINT   118°C (244°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)
-58 38.40 0.256 0.612 85.9
-50 28.30 0.258 0.615 85.7
-40 20.40 0.262 0.617 85.6
-20 11.90 0.268 0.622 85.2
0 7.70 0.275 0.628 84.8
20 5.40 0.281 0.633 84.4
40 4.20 0.288 0.638 84.0
60 3.40 0.294 0.643 83.6
80 2.90 0.301 0.649 83.3
100 2.40 0.307 0.654 82.9
120 2.10 0.314 0.659 82.5
140 1.80 0.320 0.664 82.1
160 1.60 0.327 0.669 81.7
180 1.40 0.333 0.675 81.3
200 1.30 0.340 0.680 80.9
220 1.20 0.346 0.685 80.6
240 1.10 0.353 0.690 80.2
260 0.97 0.356 0.696 79.8
280 0.89 0.366 0.701 79.4
300 0.82 0.373 0.706 79.0
320 0.76 0.379 0.711 78.6
340 0.70 0.386 0.717 78.3
360 0.65 0.392 0.722 77.9
380 0.61 0.399 0.727 77.5
400 0.57 0.405 0.732 77.1
420 0.53 0.412 0.737 76.7
425 0.53 0.413 0.739 76.6

 

Temperature (°C) Viscosity (mPa•s) Thermal Conductivity (W/m•K) Specific Heat (kJ/kg•K) Density (kg/m3)
-50 38.40 0.435 2.563 1378
-40 20.40 0.445 2.583 1373
-30 12.50 0.455 2.602 1367
-20 8.40 0.465 2.622 1362
-10 5.99 0.475 2.642 1356
0 4.70 0.485 2.661 1351
10 3.80 0.495 2.681 1345
20 3.20 0.505 2.701 1340
30 2.70 0.515 2.720 1334
40 2.40 0.525 2.740 1328
50 2.10 0.535 2.760 1323
60 1.80 0.545 2.780 1317
70 1.60 0.555 2.799 1312
80 1.50 0.565 2.819 1306
90 1.30 0.575 2.839 1301
100 1.20 0.585 2.858 1295
110 1.10 0.595 2.878 1290
120 1.00 0.605 2.898 1284
130 0.94 0.615 2.917 1279
140 0.87 0.625 2.937 1273
150 0.81 0.635 2.957 1267
160 0.76 0.645 2.977 1262
170 0.71 0.655 2.996 1256
180 0.66 0.665 3.016 1251
190 0.62 0.675 3.036 1245
200 0.58 0.685 3.055 1240
210 0.55 0.6945 3.075 1234

Vapor Pressure

Temperature (°C) Temperature (°F) Vapor Pressure (psia)
20 68 0.23
30 86 0.28
40 104 0.45
50 122 0.81
60 140 1.43
70 158 2.39
80 176 3.78
90 194 5.71
100 212 8.31
110 230 11.70
120 248 16.20
130 266 21.90
140 284 29.10
150 302 38.20
160 320 49.50
170 338 63.30
180 356 80.30
190 374 100.90
200 392 125.80
210 410 155.60
218 424 183.6

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-50 high-performance heat transfer fluid designed as an alternative to less effective glycol, PAG, and Calcium Chloride open bath fluids.