PROPYLENE GLYCOL

Anti-Freeze | Freeze & Burst Protection

Non-Toxic | Non-Corrosive | Aluminum Safe

5 & 55 GALLONS

Mitco’s Propylene Glycol is non-corrosive and safe for closed systems where potable water exists. It is a heat transfer solution for use on hydronic, heat pump and solar heating systems. Product will not separate and leave deposits on heat transfer surfaces. Its lubricating qualities extend component life. Provides burst and freeze protection at temperatures as LOW as -100°F  depending on PG% (see chart on bottom of page). All ingredients used are generally recognized as SAFE (GRAS).

REFERENCE:
PART # F5-5-60 (5 Gallon), F5-55-60 (55 Gallon) - 60%
PART # F5-5-95 (5 Gallon), F5-55-95 (55 Gallon) - 95%

OPTIONS:

- 5, 55, 275 gallon options

- CUSTOM COLORS & PERCENTAGES

- Custom Blends Typically Take 3-5 business days depending on the volume of the order. Custom orders require shipping zip code, color, percentage, quantity in gallons, and perferred container size of 5,55,275.

Email: sales@mitcomfg.com

WHAT IS PROPYLENE GLYCOL
HOW IS IT USED IN THE HVAC INDUSTRY
FREQUENTLY ASKED QUESTIONS

GLYCOL CALCULATOR

SYSTEM VOLUME CALCULATOR

Inside Pipe Diameter:

Inches
Pipe Length:
Feet
Total System Volume =

CONCENTRATION ADJUSTMENT CALCULATOR

Volume of the System:
Gallons
Current System Percentage:
%
Desired Percentage:
%
Gallons to be removed from system:
Gallons of water to be added to system:
Gallons of concentrate to be added to system:

NOTE: CONCENTRATION ADJUSTMENT CALCULATOR BASED ON 95% CONCENTRATION TO BE ADDED

Freeze & Burst Protection Chart

What is Propylene Glycol?

Propylene glycol is a synthetic organic compound that belongs to the class of chemicals known as diols (glycols). It is a colorless, odorless, liquid with a slightly sweet taste. Here are some of its common uses:

  1. Industrial Applications: It is used as a heat transfer fluid in various industrial processes, including heating, cooling, and refrigeration systems. It can also be found in hydraulic fluids, paints, coatings, and detergents.

  2. Antifreeze and Deicing Solutions: Propylene glycol is used in antifreeze and deicing solutions for vehicles and aircraft. Compared to ethylene glycol, another glycol compound used for the same purposes, propylene glycol is less toxic and safer for handling.

  3. Food and Beverage Industry: Propylene glycol is used as a food additive  to help maintain moisture, prevent crystallization, and enhance flavor in a variety of processed foods, beverages, and pharmaceutical products. It is considered safe for consumption in moderate amounts.

  4. Pharmaceuticals: Propylene glycol is used as a solvent in the production of various oral and injectable medications, as well as topical creams and ointments. Its ability to dissolve a wide range of substances makes it valuable in pharmaceutical formulations.

  5. Cosmetics and Personal Care Products: It is a common ingredient in cosmetics, skincare products, and toiletries due to its moisturizing and emulsifying properties. It helps maintain product consistency and prevents ingredients from separating.

  6. E-Cigarettes and Vaping: Propylene glycol is a common ingredient in e-liquids used in electronic cigarettes and vaping devices. It helps create the vapor that users inhale when vaping.

How is Glycol used in the HVAC industry?

In the HVAC (Heating, Ventilation, and Air Conditioning) industry, propylene glycol is commonly used as a heat transfer fluid in systems that require the transfer of heat between different components or mediums. It serves as an alternative to water in cases where freezing, corrosion, or other issues associated with water-based systems need to be addressed. Here’s how propylene glycol is used in the HVAC industry:

  1. Hydronic Heating Systems: Hydronic heating systems use water or another fluid to transfer heat from a central source, such as a boiler, to various heat emitters (radiators, baseboard heaters, or underfloor heating systems) throughout a building. In colder climates, there is a risk that the water in these systems could freeze during winter months, leading to pipe damage and system failure. By mixing propylene glycol with water, the fluid’s freezing point is lowered, preventing freezing and potential damage to the system.

  2. Chilled Water Systems: Chilled water systems are used for cooling in larger commercial buildings and industrial facilities. They involve the circulation of cold water through cooling coils or air handlers to remove heat from indoor spaces. Propylene glycol can be used in these systems to lower the freezing point of the water and prevent potential freezing-related issues.

  3. Refrigeration Systems: In refrigeration systems, especially those used in cold storage facilities or industrial processes, propylene glycol can be added to the coolant or refrigerant to help maintain proper operation even in sub-freezing conditions.

  4. Solar Thermal Systems: Solar thermal systems use sunlight to heat a fluid, which is then used to provide space heating, domestic hot water, or other applications. Propylene glycol can be added to the fluid in these systems to prevent freezing and ensure that the system operates effectively in cold weather.

  5. Heat Pumps: Heat pumps transfer heat from one location to another, either for heating or cooling purposes. In regions where freezing temperatures are a concern, propylene glycol can be used in the heat transfer loop to prevent freezing and maintain system efficiency.

  6. Geothermal Systems: Geothermal heat pump systems utilize the stable temperature of the ground to provide heating and cooling. Depending on the local climate, propylene glycol may be added to the heat exchange fluid to prevent freezing.

It’s important to note that while propylene glycol is used to prevent freezing and corrosion, it may have slightly lower heat transfer capabilities compared to water. As a result, the concentration of propylene glycol in the mixture should be carefully determined to balance freeze protection with optimal heat transfer efficiency for the specific HVAC system being used.

HVAC GLYCOL FAQ's

  1. What is HVAC glycol, and why is it used?

    • HVAC glycol is a type of heat transfer fluid used in HVAC systems to prevent freezing and corrosion. It is added to the system’s water to lower the freezing point of the mixture and protect against damage caused by freezing temperatures.

  2. What types of glycols are used in HVAC systems?

    • The two main types of glycols used in HVAC systems are ethylene glycol and propylene glycol. Both serve as antifreeze agents, but propylene glycol is preferred due to its lower toxicity and environmental impact.

  3. How does glycol prevent freezing in HVAC systems?

    • Glycol molecules disrupt the formation of ice crystals, lowering the freezing point of the mixture. This prevents the fluid in the system from freezing at temperatures below the freezing point of water.

  4. What is the recommended glycol-to-water ratio?

    • The recommended glycol-to-water ratio depends on the desired level of freeze protection and the temperature conditions of the system. Common ratios range from 20% to 50% glycol concentration.

  5. Can I use a higher concentration of glycol for better freeze protection?

    • While increasing glycol concentration can provide more freeze protection, it can also reduce the heat transfer efficiency of the system. Finding the right balance is essential to ensure both freeze protection and optimal performance.

  6. What are the advantages of using propylene glycol over ethylene glycol in HVAC systems?

    • Propylene glycol is less toxic and safer for human and environmental health compared to ethylene glycol. This makes it a preferred choice, especially in systems where leaks or spills could occur.

  7. Are there any environmental or safety concerns with using glycol in HVAC systems?

    • While propylene glycol is considered safe, it’s important to handle and dispose of glycol-based fluids properly. Spills should be cleaned up promptly, and used fluids should be disposed of in accordance with regulations.

  8. Can glycol affect the efficiency of heat transfer in HVAC systems?

    • Yes, higher glycol concentrations can reduce the heat transfer efficiency of HVAC systems. It’s essential to strike a balance between freeze protection and maintaining efficient heat exchange.

  9. How often should glycol concentrations be checked and adjusted?

    • Glycol concentrations should be checked at least annually. Adjustments may be needed if the concentration has changed due to system maintenance, leaks, or other factors.

  10. What maintenance procedures are required for glycol-based HVAC systems?

    • Maintenance includes regular glycol concentration checks, system inspections for leaks or corrosion, and periodic fluid replacement. Flushing and cleaning may be necessary in cases of contamination.

  11. Can glycol degrade or break down over time?

    • Yes, glycol can degrade over time due to exposure to high temperatures, oxygen, and certain additives. Monitoring fluid properties and replacing degraded fluid is important to maintain system performance.

  12. Are there any alternatives to using glycol for freeze protection?

    • Some systems may use electric heating elements or other heat tracing methods as alternatives to glycol-based freeze protection. However, these methods might have different costs and considerations.