Heat transfer fluid ESSELTHERM 45
Heat transfer fluid ESSELTHERM 45
Description
Rated for temperatures up to 233°C (450°F), ESSELTHERM 45 is expertly designed for thermal fluid systems that demand both efficient heating and cooling. This thermal transfer fluid is not only cost-effective but also highly thermally stable, ensuring precise temperature management. It serves as a reliable alternative to more expensive synthetic and aromatic fluids, offering optimal performance for a wide range of industrial applications.
Key features
- Maximum operating temperature of 233°C (450°F) with effective cooling capabilities
- Remains pumpable at low temperatures down to -45°C (-49°F)
- Ideal for achieving precise control in both heating and cooling processes
- A cost-effective option compared to expensive synthetic and aromatic fluids
- Designed to be durable and environmentally conscious
- Utilizes a dual-stage antioxidant system to enhance resistance to oxidation
Specifications
Temperate ratings
| Max Bulk/Use Temp | 450°F |
| Max Film Temp. | 490°F |
| Pour Point ASTM D445 | -49°F |
Safety data
| Flash Point ASTM D92 | 302°F |
| Fire Point ASTM D92 | 327°F |
| Autoignition ASTM E-659-78 | 625°F |
Thermal properties
| Thermal Expansion Coefficient | 0.0564 %/°F |
| Thermal Conductivity 0°F | 0.078 BTU/hr·ft·F° |
| Thermal Conductivity 100°F | 0.076 BTU/hr·ft·F° |
| Thermal Conductivity 250°F | 0.071 BTU/hr·ft·F° |
| Thermal Conductivity 450°F | 0.066 BTU/hr·ft·F° |
| Heat Capacity 0°F | 0.504 BTU/lb·F° |
| Heat Capacity 100°F | 0.549 BTU/lb·F° |
| Heat Capacity 250°F | 0.617 BTU/lb·F° |
| Heat Capacity 450°F | 0.707 BTU/lb·F° |
Physical properties
| Viscosity ASTM D445 40°F | 33.02 cSt |
| Density ASTM D1298 0°F | 53.6 lb/ft³ |
| Density ASTM D1298 100°F | 51.4 lb/ft³ |
| Density ASTM D1298 250°F | 48 lb/ft³ |
| Density ASTM D1298 450°F | 43.4 lb/ft³ |
| Vapor Pressure ASTM D2879 0°F | 0 psia |
| Vapor Pressure ASTM D2879 100°F | 0 psia |
| Vapor Pressure ASTM D2879 250°F | 0.07 psia |
| Vapor Pressure ASTM D2879 450°F | 2.28 psia |
| Distillation Range ASTM D2887 10% | 505°F |
| Distillation Range ASTM D2887 90% | 947°F |
| Molecular Weight | 372 |
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FAQ
What is a Heat Transfer Fluid?
Heat transfer fluids are substances used to transfer heat from one location to another. They come in various types, each offering unique properties suitable for indirect heating or cooling of equipment like process reactors, molds, or extruders. They are also utilized in portable oil heaters and temperature control units. These fluids are sometimes referred to as thermal oil, thermal fluids, hot oil, or heat transfer oil.
Are all heat transfer fluids compatible with each other?
No, not all fluids are compatible. While most petroleum-based fluids are generally compatible, some glycol-based, aromatic chemical, or synthetic fluids may not be. It's important to consult your supplier's technical service department for recommendations. If you're switching from an incompatible fluid, ask your supplier for a compatible flushing fluid to avoid any issues.
How do I choose the right heat transfer fluid for my application?
Selecting the appropriate heat transfer fluid depends on several factors specific to your system and operational needs:
- Operating Temperature Range: Identify the minimum and maximum temperatures your system will encounter. Choose a fluid that performs efficiently within this range.
- System Type: Determine whether your system is open or closed, as some fluids are better suited for one type over the other.
- Compatibility: Ensure the fluid is compatible with your system's materials and any existing fluids to prevent corrosion or degradation.
- Thermal Stability: Opt for fluids with high thermal stability to minimize oxidation and extend the fluid's service life.
- Environmental and Safety Considerations: Consider the fluid's toxicity, flammability, and environmental impact, especially if spills or leaks are a concern.
- Maintenance Requirements: Some fluids may require more frequent monitoring or have specific maintenance protocols.
- Cost Effectiveness: Evaluate the total cost of ownership, including initial costs, maintenance, and potential disposal fees.
For personalized guidance tailored to your specific application, please contact ESSELTHERM technical support. Their experts can help you select the optimal heat transfer fluid to ensure efficient and reliable system performance.
How often should heat transfer fluids be changed?
The service life of heat transfer fluids varies based on their quality and the equipment they're used in. In extreme cases, a fluid might need to be changed after a few months; in other situations, it can last over ten years. The only way to accurately determine if your fluid is still effective is through specific laboratory analysis, a service your supplier should provide.
What makes one heat transfer fluid better than another?
The effectiveness of a heat transfer fluid depends on the system it's used in. Some fluids perform better in closed systems, while others excel in open systems such as those used in plastic processing. While the base stock of the fluid is important, the additives—like oxidation inhibitors and rust and corrosion preventatives—play a crucial role in extending the fluid's life. Using a fluid with the appropriate additives can keep your system running longer and cleaner between oil changes, especially if the system is open to the atmosphere.