ThermoGuard PG™ - Heat Transfer Fluid
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Prevents corrosion
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ThermoGuard PG™ Features
A heat transfer fluid formulated with USP grade Propylene Glycol and corrosion inhibitors and is intended for use in applications where the possibility of incidental food contact exists. ThermoGuard PG™ was developed for long life and superior corrosion protection and is compatible with most materials of construction such as steel, aluminum, copper alloys, and solder.
Whether you’re operating in food processing, beverage production, pharmaceutical manufacturing, or any other industry where heat management is critical, ThermoGuard PG™ offers the performance and safety you need to keep your operations running smoothly.
Formulation Tips
Before using, it is important to thoroughly clean your system. The unit should be free of scale, rust, sediment, and residual chlorides. Rinse the system with deionized water to remove any calcium, magnesium, chloride, and sulfate ions left behind from the flushing procedure.
ThermoGuard PG™ should be blended with deionized water to achieve the required freeze and/or burst point.
Water quality should meet the following minimum standard:
- < l ppm Magnesium
- < l ppm Calcium
- < 25 ppm Chloride
- < 25 ppm Sulfate
- < 25 ppm Silica
- Electrical conductivity (umho/cm @ 25° C) 20.0 max
- Total water hardness should be less than 68 ppm
Dilute 1 part ThermoGuard PG™ with 2 parts of deionized water by volume for a minimum 30% concentration. This is the lowest concentration recommended to prevent microbial growth in the system.
Blended solutions of ThermoGuard PG™ are designed for heating and cooling applications with an operating range of –28° to 300° F.
| -28° F |
| 176° F |
| 300° F |
| 320° F |
Specifications
Appearance: Clear Colorless liquid
Odor: Odorless
pH (as is): ~9.0
Performance Properties
Freeze Chart

Applications
ThermoGuard PG™ is a versatile heat transfer fluid suitable for a variety of industrial applications, particularly where food-grade standards are essential. Its excellent thermal properties, corrosion protection, and compatibility with different system materials make it a perfect choice for:
- Food and Beverage Processing: Ideal for breweries, distilleries, dairy processing, and other food and beverage facilities where there is a potential for incidental food contact.
- Pharmaceutical Manufacturing: Used in temperature control systems for maintaining critical processes in the production of medicines, vaccines, and other pharmaceutical products.
- HVAC Systems: Perfect for heating, ventilation, and air conditioning systems in both industrial and commercial buildings that require efficient heat transfer with corrosion protection.
- Plastic Molding and Extrusion: Used in cooling systems to ensure uniform temperature control for plastic manufacturing processes.
- Closed-Loop Heating and Cooling Systems: Suitable for maintaining consistent temperature regulation in a variety of industrial settings.
Additional Info
Food-Grade Formulation for Safety
ThermoGuard PG™ is made from USP-grade Propylene Glycol, ensuring that it meets the stringent safety requirements for applications with potential incidental contact with food. It is safe, non-toxic, and compliant with FDA regulations for indirect food additives, making it the ideal choice for food and beverage industries. With ThermoGuard PG™, you can ensure the safety of your operations while maintaining efficient system performance.
Superior Corrosion Inhibitors
Industrial systems, such as cooling towers, boilers, and closed-loop heating or cooling systems, can suffer from corrosion over time, particularly when exposed to water-based fluids. ThermoGuard PG™ is specially formulated with advanced corrosion inhibitors that protect a variety of metals, including steel, aluminum, copper alloys, and solder. This protection minimizes corrosion, reduces the risk of system failure, and extends the life of your equipment.
Long-Lasting Performance and Stability
ThermoGuard PG™ is designed to offer long-lasting performance in industrial applications. It has excellent thermal stability and minimal degradation over time, meaning it can function efficiently across a wide range of temperatures without requiring frequent replacement. This reduces overall maintenance costs and increases system efficiency, making it a cost-effective solution for long-term heat transfer needs.
Excellent Heat Transfer Properties
The primary function of any heat transfer fluid is to move heat efficiently within a system. ThermoGuard PG™ excels in this area, offering exceptional heat transfer capabilities. Its high thermal conductivity ensures that heat is distributed evenly and quickly, enhancing the performance of your heating and cooling systems. This efficiency makes ThermoGuard PG™ an ideal choice for systems that need precise temperature control.
Material Compatibility
ThermoGuard PG™ is compatible with a wide range of materials commonly used in industrial systems, including steel, aluminum, copper, and solder. Its non-reactive nature ensures that it won’t degrade or damage system components, further contributing to the longevity of your equipment. This makes it an excellent choice for diverse industrial environments where multiple materials are used in system construction.
Standard Packaging
55-gallon drums and bulk packaging.
Shelf Life
ThermoGuard PG™ has a shelf life of 2 years.
Downloads
Technical Data Sheet
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