CR Low Temperature Heat Transfer Fluid
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°C | 400°F / 204°C |
Cryogenic HTF 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’s cryogenic transfer fluid has significantly lower viscosity than silicone-based heat transfer fluids. Simply replacing existing fluid with Paratherm CR heat trasfer fluid 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 low temperature heat transfer fluid 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 | 425°F (218°C) |
| Maximimum Recommended Operating Temperature | 400°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 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
| Units | HR™ | NF© | HE© | OR© | MR™ | LR™ | CR™ | |
|---|---|---|---|---|---|---|---|---|
| Critical Temperature, Tc(Calculated) | R° | 1465 | 1453 | 1580 | 1524 | 1358 | 1174 | 1168 |
| F° | 1005 | 993 | 1120 | 1064 | 899 | 714 | 709 | |
| K | 814 | 807 | 878 | 847 | 755 | 652 | 649 | |
| Critical Pressure, Pc(Calculated) | 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) | 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 | BTU/lb | 110 | 91 | 77 | 93 | 115 | 113 | 148 |
| Molecular Weight avg | MW | 239 | 350 | 445 | 360 | 230 | 160 | 133 |
