Peter Huber Thermofluid M90.055.03 SilOil (10 Liters)

The Peter Huber Thermofluid M90.055.03 SilOil (Order No. 6259) is a professional-grade, low-viscosity silicone oil supplied in a 10-liter container. This high-performance heat transfer medium is specifically engineered for extreme low-temperature applications, offering a remarkable cooling depth down to -90°C. Known for its exceptional thermodynamic properties, M90.055.03 ensures rapid temperature transitions and high-precision control in both laboratory and industrial settings. It is the recommended fluid for Huber Unistats and other closed-loop systems where maintaining fluidity at cryogenic temperatures is critical for pump performance and thermal efficiency.

Key Features:

• Extended Volume: 10-liter pack size, ideal for larger circulation systems or for maintaining reserve stock.
• Extreme Working Range: Operates from -90°C up to +55°C in open systems, and up to +170°C in externally sealed (closed) systems like Huber Unistats.
• Ultra-Low Viscosity: Maintains a low viscosity of approximately 2 mm²/s at 25°C, reducing internal resistance and ensuring high flow rates even at -90°C.
• Superior Thermal Stability: Based on linear polydimethylsiloxane, providing a chemically inert, odorless, and colorless medium that resists aging.
• High Flash Point: Features a relatively high flash point (approx. 88°C) considering its low-temperature capabilities, enhancing operational safety.
• Non-Hazardous: Classified as non-toxic and not a dangerous good, ensuring safer handling, easier storage, and simplified shipping.
• Environmental Compliance: Free from CFCs and HCFCs, aligning with modern sustainability and safety standards in the laboratory.

Huber M90.055.03 SilOil is specifically designed to prevent the "creeping" effects and oxidation issues common in lesser silicone fluids when used in closed systems. By choosing this fluid, operators ensure the longevity of their Huber equipment, protecting internal components like the pump and evaporator from the stresses of extreme temperature cycling.

Frequently Asked Questions

1. Why is the maximum temperature higher in a "closed" system?
In a closed, hydraulically sealed system (like a Huber Unistat), the fluid is not in contact with ambient oxygen. This prevents oxidation and allows the oil to be heated safely to +170°C, whereas in an open bath, it is limited to +55°C to prevent evaporation and fire risk.

2. Can I use this 10L container to top up an existing system?
Yes, provided the current fluid is also a polydimethylsiloxane-based SilOil. While miscible, mixing different grades will shift the viscosity and the effective temperature range of your system.

3. Is this fluid compatible with all hoses?
SilOil is incompatible with silicone-based tubing and seals, which will swell and degrade. It is recommended to use Huber's insulated metal hoses or PTFE/EPDM hoses for all connections.

4. How often should the M90.055.03 be replaced?
The service life depends on the thermal load and moisture exposure. In a closed system, it can last several years. You should check the fluid if you notice a significant change in color, viscosity, or a decrease in thermal performance.

5. What is the solidification point of this fluid?
The fluid remains functional down to -90°C, but its pour point/solidification point is approximately -137°C, ensuring it will not freeze even if the unit experiences temperatures slightly below the working range.