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Heat Transfer Fluids

For non-pressurized closed-loop thermal systems

Paratherm™ CR HTF

LOW-TEMPERATURE PROCESS COOLING TO -88°C (-127°F)

Paratherm™ CR low-temperature heat transfer fluid is a unique blend of synthetic components formulated to provide superior cooling performance in closed-loop heat-transfer systems operating down to -88°C (-127°F) yet is capable of maintenance-free operation up to 204° C (400°F).

OPERATING RANGE

Minimum Startup Temp (300cSt)Maximum Operating Temp
-170°F / -112°C400°F / 204°C

FEATURES

  • Highly specialized HTF with extreme low temperature capabilities
  • Single fluid heating and cooling with wide operating range
  • Efficient alternative to low temperature silicones

Get 10ºC colder without changing your equipment…

  • 20% Increase in Flow Rate
  • No Equipment Modifications
  • 10°F Lower Operation, Same Viscosity
  • Aerospace Testing Fluid
  • Fine Chemical Processes, Pharmaceutical Production

APPLICATIONS INCLUDE

INCREASED CAPACITY IN EXISTING SYSTEMS

In the cryogenic temperature range, Paratherm CR low-temperature heat transfer fluid has significantly lower viscosity than silicone-based heat transfer fluids. Simply replacing existing fluid with Paratherm CR can increase the cooling output of the system by up to 50% at -70°C and up to 70% at -90°C.

EASIER TO WORK WITH

Paratherm CR will not leave a slippery residue on surfaces if it leaks out. Water will not accelerate fluid degradation or cause significant changes in the freeze point. Testing has shown that Paratherm CR low-temperature fluid will not cause copper tubing to oxidize if water is present, thus offering designers more flexibility in material selection.

Mobile users view full PDF here: CR-Bulletin_Mar2022.pdf

Mobile users view full PDF here: PARATHERM-CR-SDS.pdf

TYPICAL PROPERTIES*

Chemical NameSynthetic Hydrocarbon Blend
AppearanceWater White Liquid
OdorSweet Odor
Maximum Recommended Film Temperature 425°F (218°C)
Maximimum Recommended Operating Temperature400°F (204°C)
Minimum Operating Temperature 20 cPs (20mPa-s) -127°F (-88°C)
Minimum Start-up Temperature 300 cPs (300 mPa-s)  -170°F (-112°C)
Viscosity @ 60°F/15.5°C sSt (mm2/sec)1
Density @ 60°F/15.5°C lb/gal (kg/m3 )6.9 (833)
Flash Point Closed Cup (D56)>104°F (40°C)
Autoignition Temperature (max 10 sec ignition delay)>430°F (221°C)
Freeze Point<-166°F/<-110°C
Boiling Point (14.7 psia/101 kPa)342°F/172°C
Vapor Pressure @ maximum operating temperature psia (kPa)21 (148)
% Volume expansion over recommended operating temperature per 100°F (°C)8.7 (15.7)
Average Molecular Weight130
Dielectric Breakdown voltage D1816-04 (kV, 0.1″ gap)36.11
Dielectric Constant (1KHz) D924-042.59
Dissipation Factor (1 KHz) D924-040.00145
Volume Resistivity at 100V (?-cm) D257-078.3 X 1011
Heat of Combustion (approximate) BTU/lb (kJ/kg)17,000 (39,400)
Heat of Vaporization (approximate) BTU/lb (kJ/kg)148 (343)

Mobile users view full PDF here: CR-Thermal.pdf

Mobile users view full PDF here: CR-Case-History.pdf

PARATHERM HEAT TRANSFER FLUIDS

 UnitsHR™NF©HE©OR©MR™LR™CR™
Critical Temperature,
Tc(Calculated)
146514531580152413581174 1168
100599311201064899714709
K814807878847755652649
Critical Pressure,
Pc(Calculated)
ATM18.711.126.513.312.910.728.6
PSIA274163389196190157421
Critical Volume,
Vc(Calculated)
cm3/g-mole8161579 72013809871327493
ft3/lb0.0370.0720.0330.0630.0450.060.023
Heat of Vaporization,
DH vap
BTU/lb110917793115113148
Molecular Weight avgMW239350445360230160133
Constants: k=Cp/Cv = 1.01 | C’ = 316.5 | R = 82.06 cm3*atm/mol*K | Fb = 1.0

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