Open-bath heating with air exposure is one of the most challenging applications for heat transfer fluids. Conventional heat transfer fluids in open oil baths undergo accelerated oxidation at high temperatures, leading to increased viscosity, acid value, density, and carbon residue, as well as reduced flash point, thermal stability, and safety. Additionally, conventional oils have low smoke points—emitting heavy smoke and irritating fumes at just tens of degrees Celsius. Long-term inhalation can seriously harm operator health.
UOLEN®has developed a complete line of specialized fluids for such demanding oil bath applications. Proven in real-world conditions, the UOLEN®series offers high smoke point, low odor, strong oxidation resistance, excellent thermal stability, longer service life, and safer operation.See the table below for key specifications of different UOLEN®series products. For expert selection advice, feel free to contact us.
| Product Model | Temperature range for closed system(°C) | Pour point (°C) |
Flash point (°C) |
Boiling point (°C) |
Viscosity (mm²/s) |
Moisture content (ppm) |
Expansion coefficient (K⁻¹) |
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| UOLEN®150H | 25°C to 250°C | <-65°C | 330°C | >350°C | 35(at 60°C) | <100 | 0.00095 | Get a quote |
| UOLEN®180 | 25°C to 180°C | <-60°C | 330°C | >300°C | 103(at 20°C) | <100 | 0.00096 | Get a quote |
| UOLEN®220 | -10°C to 220°C | <-40°C | >240°C | >300°C | 110(at-10°C) | <100 | 0.00098 | Get a quote |
| UOLEN®500H | 25°C to 250°C | <-40°C | >330°C | >350°C | 500(at 25°C) | <100 | 0.00095 | Get a quote |
| UOLEN®1000H | 25°C to 250°C | <-40°C | >330°C | >350°C | 1000(at 25°C) | <100 | 0.00095 | Get a quote |
| UOLEN®10 | -60°C to 140°C | <-95°C | 210°C | >300°C | 109.2(at-60°C) | <100 | 0.00107 | Get a quote |
| UOLEN®45 | -40°C to 150°C | <-80°C | 246°C | >300°C | 110(at-40°C) | <100 | 0.00101 | Get a quote |
| UOLEN®50 | -30°C to 170°C | <-65°C | 320°C | >300°C | 44.8(at-20°C) | <100 | 0.00098 | Get a quote |

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