Paratherm™ CR Heat Transfer Fluid

Paratherm™ CR Heat Transfer Fluid

 

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 218° C (425°F).

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:

  • Fine and Specialty Chemical Processing
  • Pharmaceutical production
  • Environmental test chambers

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.

Typical properties*

Chemical Name Synthetic Hydrocarbon Blend
Appearance Water White Liquid
Odor Sweet Odor
Maximum Recommended Film Temperature  550°F (288°C)
Maximimum Recommended Operating Temperature 425°F (218°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) 358°F/182°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 Weight 130
Dielectric Breakdown voltage D1816-04 (kV, 0.1″ gap) 36.11
Dielectric Constant (1KHz) D924-04 2.59
Dissipation Factor (1 KHz) D924-04 0.00145
Volume Resistivity at 100V (?-cm) D257-07 8.3 X 1011
Heat of Combustion (approximate) BTU/lb (kJ/kg) 17,000 (39,400)
Heat of Vaporization (approximate) BTU/lb (kJ/kg) 148 (343)

Paratherm Heat Transfer Fluids

Critical Temperature, Tc(Calculated) Units HR™ NF© HE© OR© MR™ LR™ CR™
ºR 1465 1453 1580 1524 1358 1174 1168
ºF 1005 993 1120 1064 899 714 709
K 814 807 878 847 755 652 649
Critical Pressure, Pc(Calculated) Units HR™ NF© HE© OR© MR™ LR™ CR™
ATM 18.7 11.1 26.5 13.3 12.9 10.7 28.6
PSIA 274 163 389 196 190 157 421
Critical Volume, Vc(Calculated) Units HR™ NF© HE© OR© MR™ LR™ CR™
cm3/g-mole 816 1579 720 1380 987 1327 493
ft3/lb 0.037 0.072 0.033 0.063 0.045 0.06 0.023
Heat of Vaporization,DH vap Units HR™ NF© HE© OR© MR™ LR™ CR™
BTU/lb 110 91 77 93 115 113 148
Molecular Weight avg Units HR™ NF© HE© OR© MR™ LR™ CR™
MW 239 350 445 360 230 160 133

Constants

k=Cp/Cv = 1.01
C’ = 316.5
R = 82.06 cm3*atm/mol*K
Fb = 1.0

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