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Open Bath Fluids

Open Bath Fluids

How to Choose the Open Bath Fluid for Your Application?

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.


-60°C (-76°F) 250℃(482°F)
Note: Click on the product model to view details.
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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