What is Dowfrost HD used for?
DOWFROST HD Concentrate is a propylene glycol-based heat transfer fluid that is widely used for secondary cooling and heating applications, for freeze and burst protection of pipes, and for various deicing, defrosting, and dehumidifying applications.
What is the difference between Dowfrost and dowtherm?
Generally, the DOWTHERM SR-1 or DOWFROST HD solution is chilled to between 20 and 26°F to make ice. A 25% solution of DOWTHERM SR-1 fluid has a freezing point below 14°F, while a similar solution of DOWFROST HD fluid has a freezing point below 16°F.
Is DOWFROST propylene glycol?
DOWFROST™ Heat Transfer Fluid is the only inhibited glycol made with DOW PuraGuard™ Propylene Glycol USP/EP, a pharmaceutical grade of monopropylene glycol with specified purity greater than 99.8%.
What color is DOWFROST?
fluorescent yellow color
DOWFROST™ HD has a fluorescent yellow color and can operate at higher temperatures than regular DOWFROST™. DOWFROST™ HD is suitable for use in environments between -50°F and 325°F (-45°C and 160°C). DOWFROST™ HD is intended for low toxicity, non-food processing applications and provides freeze protection down to -60 F.
Is ethylene a glycol?
Ethylene glycol (IUPAC name: ethane-1,2-diol) is an organic compound with the formula (CH2OH)2. It is mainly used for two purposes, as a raw material in the manufacture of polyester fibers and for antifreeze formulations. It is an odorless, colorless, sweet-tasting, toxic, viscous liquid.
What’s the difference between propylene glycol and ethylene glycol?
The main difference between propylene glycol and ethylene is the level of toxicity. Propylene glycol has a very low toxicity, which is why it is also found in cosmetics and personal care products, whereas ethylene glycol is poisonous and must be handled with caution to restrict any human or animal exposure.
What is propylene glycol antifreeze?
Propylene glycol is considerably less toxic than ethylene glycol and may be labeled as “non-toxic antifreeze”. It is used as antifreeze where ethylene glycol would be inappropriate, such as in food-processing systems or in water pipes in homes where incidental ingestion may be possible.
What organ does ethylene glycol effect?
An overdose of ethylene glycol can damage the brain, lungs, liver, and kidneys. The poisoning causes disturbances in the body’s chemistry, including metabolic acidosis (increased acids in the bloodstream and tissues). The disturbances may be severe enough to cause profound shock, organ failure, and death.
Which is better ethylene or propylene?
The difference between Propylene Glycol and Ethylene Glycol in antifreeze comes down to both toxicity levels and efficiency of performance. Ethylene glycol possess far superior heat transfer properties whereas Propylene Glycol carries a very low toxicity.
What is better than ethylene glycol?
Propylene glycol solutions have higher viscosity and higher freezing point than ethylene glycol at the same percentage, causing it to be less thermally efficient than ethylene glycol, especially at lower temperatures. Propylene glycol is also more expensive than ethylene glycol.
How can you tell the difference between propylene and ethylene glycol?
A. Yes it is possible to differentiate between ethylene glycol and propylene glycol using both refractive index and specific gravity. The key to differentiate the two is to use the physical differences with regard to specific gravity and refractive index.
Which is the best temperature for dowfrost HD?
DOWFROST™ HD is suitable for use in environments between -50°F and 325°F (-45°C and 160°C). DOWFROST™ HD is available in a range of prediluted concentrations and package sizes. DOWFROST™ HD is an ideal thermal fluid for a broad variety of heat transfer applications across a range of industries and applications.
What does dowfrost HD glycol based coolants do?
DOWFROST™ HD glycol-based coolants contain specially formulated industrial inhibitor packages that are effective in preventing corrosion of metals commonly used in HVAC, food processing, and process heat transfer equipment. These inhibitors prevent corrosion of metals in two ways.
What kind of heat transfer fluid is dowfrost?
DOWFROST (TM) HD heat transfer fluid is a formulation of 94.0 percent propylene glycol and a specially designed package of industrial corrosion inhibitors. Suitable applications with a single fluid process heating and cooling, closed-loop, water-based HVAC applications where propylene glycol solutions are preferred or required.
What kind of corrosion protection does dowfrost HD provide?
DOWFROST™ HD fluid provides corrosion protection well within the recommended guidelines for typical metals, and can provide 20+ years of worry-free protection. However, when methanol is used, the fluid is often installed without, or with improper, corrosion inhibitors.