Solar Fluids

XCELTHERM® LV1

Biphenyl-free, non-hazardous alternative for high temp fluids with liquid or vapor phase to 700ºF (370ºC). Chemically similar to DOWTHERM™ A when used under 700ºF (370ºC). Recommended for Concentrated Solar Power Systems, PET production, Synthetic Fiber plants, Chemical Processing and many other applications that require a high temperature heat transfer fluid.

Typical Properties
Engineering Properties
Safety Data Sheet
EU Safety Data Sheet
Contact HTF Representative
Terms and Conditions

Typical Properties

Key Operating Temperatures
Maximum Bulk Fluid Operating Temperature
Liquid Phase 700°F 371°C
Vapor Phase 700°F 371°C
Maximum Film Temperature 750°F 400°C
Freezing/Melting Point 45°F 7.2°C
Flash Point (Pensky Martens)(ASTM D93) 225°F 107°C
Flash Point (COC)(ASTM D92) 252°F 122°C
Fire Point (minimum)(ASTM D92) 262°F 128°C
Autoignition Temperature (minimum) 1120°F 604°C
Normal Boiling Point, at 760 mm Hg 496°F 258°C
Physical Properties
Appearance Water-white to straw yellow liquid or solid (may vary)
Odor Aromatic
Composition Stable mixtures of 1,1 Diphenylethane and Diphenyl Oxide
Critical Temperature 931°F
Critical Pressure 443.2 psia
Critical Volume 0.0516 ft3/lb
Moisture Content (maximum) 300 ppm
Density @ 77°F/25°C 8.84 lbs/gal
Specific Gravity @ 77°F/25°C 1.060
Average Molecular Weight 171.9 g/mol
Heat of Vaporization, at Maximum Use 119 BTU/lb 276.8 kJ/kg
Heat of Fusion 42 BTU/lb 23.3 cal/g
Moisture Content (maximum) 300 ppm
Electrical Properties
Specific Resistivity, at 68°F/20°C 6.4 x 10 ohm-cm
Surface Tension in Air, at 77°F/ 25°C 36.6 dynes/cm
* Data represents typical laboratory samples and are not guaranteed for all samples

Engineering Properties

LIQUID PHASE*
Temperature Viscosity Density Specific Heat Thermal
Conductivity		 Enthalpy (Liquid) Vapor
Pressure
ºF ºC cP lb/ft3 kg/m3 BTU/lb-ºF
 J/g-K BTU/ft-hr-ºF W/m-K BTU/lb J/g psia kg/cm2
45 7.2 8.416 67.05 1074.20 0.366 1.532 0.0793 0.1372 0.0 0.0 – –
55 12.8 7.146 66.76 1069.56 0.370 1.547 0.0790 0.1367 3.7 8.5 0.0001 –
60 15.6 6.585 66.62 1067.24 0.372 1.555 0.0788 0.1364 5.5 12.9 0.0001 –
80 26.7 4.747 66.04 1057.97 0.380 1.589 0.0781 0.1352 13.0 30.3 0.0004 –
100 37.8 3.422 65.46 1048.70 0.388 1.623 0.0775 0.1341 20.7 48.2 0.0010 0.0001
120 48.9 2.619 64.88 1039.43 0.396 1.656 0.0768 0.1329 28.6 66.4 0.0024 0.0002
140 60.0 2.110 64.30 1030.15 0.403 1.686 0.0761 0.1317 36.5 84.9 0.0055 0.0004
160 71.1 1.748 63.73 1020.88 0.411 1.720 0.0753 0.1304 44.7 103.8 0.0119 0.0008
180 82.2 1.478 63.15 1011.61 0.418 1.750 0.0745 0.1289 52.9 123.0 0.238 0.0017
200 93.3 1.277 62.57 1002.34 0.426 1.784 0.0738 0.1276 61.4 142.7 0.0453 0.0032
220 104.4 1.113 61.99 993.06 0.433 1.814 0.0729 0.1262 69.9 162.5 0.0819 0.0058
240 115.6 .0981 61.41 983.79 0.441 1.847 0.0721 0.1248 78.7 182.9 0.1420 0.0100
260 126.7 0.872 60.83 974.52 0.449 1.877 0.0713 0.1233 87.6 203.5 0.2371 0.0167
280 137.8 0.782 60.25 965.25 0.456 1.907 0.0704 0.1218 96.6 224.4 0.3813 0.0268
300 148.9 0.705 59.67 955.97 0.464 1.941 0.0694 0.1202 105.8 245.9 0.5937 0.0417
320 160.0 0.625 59.09 946.70 0.471 1.971 0.0685 0.1186 115.1 267.4 0.8983 0.0632
340 171.1 0.560 58.52 937.43 0.478 2.001 0.0676 0.1170 124.5 289.4 1.3255 0.0932
360 182.2
 0.501 57.94 928.16 0.485 2.031 0.0667 0.1154 134.1 311.6 1.9126 0.1345
380 193.3 0.449 57.36 918.88 0.492 2.061 0.0657 0.1137 143.8 334.2 2.7052 0.1902
400 204.4 0.402 56.78 909.61 0.500 2.091 0.0647 0.1120 153.7 357.1 3.7582 0.2642
420 215.6 0.380 56.20 900.34 0.507 2.121 0.0637 0.1103 163.7 380.3 5.0923 0.3580
440 226.7 0.351 55.62 891.07 0.515 2.155 0.0626 0.1084 174.0 404.3 6.8153 0.4792
460 237.8 0.325 55.04 881.79 0.521 2.181 0.0615 0.1065 184.1 427.8 8.9813 0.6315
480 248.9 0.302 54.46 872.52 0.529 2.215 0.0605 0.1046 194.7 452.5 11.6262 0.8174
500 260.0 0.281 53.89 863.25 0.536 2.245 0.0594 0.1028 205.3 477.1 14.8938 1.0472
520 271.1 0.270 53.31 853.97 0.544 2.275 0.0583 0.1009 216.0 502.0 18.9744 1.3341
540 282.2 0.254 52.73 844.70 0.551 2.305 0.0571 0.0989 226.9 527.3 23.4278 1.6472
560 293.3 0.240 52.15 835.43 0.558 2.335 0.0559 0.0968 237.9 552.9 29.4791 2.0727
580 304.4 0.226 51.57 826.16 0.565 2.365 0.0548 0.0948 249.1 578.8 36.1528 2.5419
600 315.6 0.213 50.99 816.88 0.572 2.395 0.0535 0.0926 260.4 605.1 43.9759 3.0919
620 326.7 0.202 50.41 807.61 0.580 2.429 0.0523 0.0905 272.1 632.3 53.0235 3.7281
640 337.8 0.192 49.83 798.34 0.588 2.459 0.0510 0.0883 283.7 659.2 63.4136 4.4586
660 348.9 0.182 49.26 789.07 0.596 2.492 0.0498 0.0862 295.7 687.1 75.3070 5.2948
680 360.0 0.173 48.68 779.79 0.604 2.526 0.0486 0.0840 307.8 715.4 88.9551 6.2544
700 371.1 0.165 48.10 770.52 0.612 2.559 0.0472 0.0818 320.1 744.0 103.7129 7.2921
VAPOR PHASE*
Temperature Viscosity Density Specific Heat Thermal
Conductivity		 Latent Heat Vap Enthalpy
¹
ºF ºC cP lb/ft3 kg/m3 BTU/lb-ºF J/g-K BTU/ft-hr-ºF W/m-K BTU/lb J/g BTU/lb J/g
45 7.2 0.00760 – – 0.2319 0.5389 0.0099 0.0172 177.8 413.2 177.8 413.2
55 12.8 0.00780 – – 0.2360 0.5484 0.0093 0.0160 176.8 410.9 180.5 419.4
60 15.6 0.00790 – – 0.2381 0.5533 0.0093 0.0161 176.2 409.6 181.8 422.4
80 26.7 0.00830 – – 0.2466 0.5732 0.0093 0.0162 173.9 404.1 186.9 434.4
100 37.8 0.00870 – – 0.2551 0.5929 0.0095 0.0164 171.5 398.5 192.2 446.6
120 48.9 0.00910 0.0001 0.0011 0.2636 0.6126 0.0095 0.0165 169.1 393.0 197.7 459.4
140 60.0 0.00950 0.0001 0.0024 0.2720 0.6321 0.0097 0.0167 166.7 387.5 203.3 472.4
160 71.1 0.00990 0.0003 0.0049 0.2804 0.6516 0.0098 0.0170 164.4 382.0 209.0 485.8
180 82.2 0.01030 0.0006 0.0095 0.2887 0.6710 0.0100 0.0172 162.0 376.5 214.9 499.5
200 93.3 0.01070 0.0011 0.0175 0.2970 0.6903 0.0101 0.0175 159.6 371.0 221.0 513.7
220 104.4 0.01110 0.0019 0.0308 0.3053 0.7095 0.0102 0.0177 157.4 365.7 227.03 528.2
240 115.6 0.01150 0.0032 0.0519 0.3135 0.7287 0.0104 0.0180 155.6 361.6 234.3 544.5
260 126.7 01.1190 0.0053 0.0842 0.3217 0.7477 0.0105 0.0182 153.0 355.7 240.6 559.2
280 137.8 0.01230 0.0082 0.1318 0.3299 0.7667 0.0108 0.0186 151.0 350.9 247.6 575.3
300 148.9 0.01270 0.0125 0.1997 0.3380 0.7856 0.0109 0.0189 148.7 345.6 254.5 591.5
320 160.0 0.01310 0.0184 0.2944 0.3461 0.8044 0.0112 0.0193 146.5 340.5 261.6 607.9
340 171.1 0101350 0.0264 0.4236 0.3542 0.8231 0.0113 0.0196 144.2 335.1 268.7 624.5
360 182.2 0.01390 0.0372 0.5963 0.3622 0.8417 0.0115 0.0200 141.9 329.8 276.0 641.4
380 193.3 0.01430 0.0514 0.8234 0.3702 0.8602 0.0118 0.0204 139.6 324.4 283.4 658.6
400 204.4 0.01470 0.0697 1.1172 0.3781 0.8787 0.0120 0.0208 137.4 319.3 291.0 676.4
420 215.6 0.01510 0.0923 1.4794 0.3860 0.8970 0.0123 0.0214 135.1 313.9 298.7 694.2
440 226.7 0.01550 0.1208 1.9360 0.3939 0.9153 0.0126 0.0218 132.8 308.5 306.7 712.8
460 237.8 0.01590 0.1558 2.4958 0.4017 0.9335 0.0128 0.0222 130.4 303.2 316.5 735.7
480 248.9 0.01630 0.1974 3.1620 0.4095 0.9516 0.0132 0.0228 128.1 297.8 322.8 750.3
500 260.0 0.01670 0.2476 3.9663 0.4172 0.9696 0.0134 0.0232 125.9 292.6 331.2 769.7
520 271.1 0.01710 0.3090 4.9498 0.4249 .09876 0.0137 0.0238 123.6 287.2 339.6 789.2
540 282.2 0.01750 0.3739 5.9893 0.4326 1.0054 0.0141 0.243 121.3 281.8 348.2 809.1
560 293.3 0.01790 .04612 7.3885 0.4403 1.0232 0.0144 0.0249 118.9 276.4 356.8 829.3
580 304.4 0.01830 0.5547 8.8868 0.4479 1.0409 0.0147 0.0255 116.6 271.0 365.7 849.8
600 315.6 0.01870 .06620 10.6058 0.4554 1.0585 0.0150 0.0260 114.4 265.8 374.7 870.9
620 326.7 0.01910 0.7835 12.5510 0.4630 1.0760 0.0154 0.0266 111.5 259.2 383.6 891.5
640 337.8 0.01950 0.9199 14.7374 0.4705 1.0934 0.0158 0.0273 108.3 251.8 392.0 911.0
660 348.9 0.01990 1.0730 17.1888 0.4779 1.1107 0.0161 0.0279 105.1 244.4 400.8 931.5
680 360.0 0.02030 1.2452 19.9476 0.4854 1.1280 0.0165 0.0286 102.0 237.0 409.8 952.3
700 371.1 0.02070 1.4267 22.8559 0.4927 1.1451 0.0169 0.0293 98.8 229.5 418.9 973.5