Paratherm™ CR Heat Transfer Fluid

Paratherm™ CR Heat Transfer Fluid

 

Low-Temperature Process Cooling to -88°C (-127°F)

Paratherm™ CR 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 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 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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