A ready-to-use propylene glycol solution for heat transfer and solar heating systems with corrosion protection at high temperatures and frost protection

Antifrogen SOL^® is a physiologically harmless, green-tinted, clear liquid based on an aqueous solution of 1.2-propylene glycol and higher glycols, which is used as a heat transfer medium in solar heating systems, especially those exposed to high thermal loads. The product is premixed ready for use with deionized water to give a frost resistance of about -30°C. It is inhibited with non-toxic corrosion inhibitors and is nitrite-, amine- and phosphate-free. It meets the requirements of DIN 4757, part 3 for solar heating systems..

Antifrogen SOL® was developed because of the increased use of vacuum collectors, which have a high stand-still temperature of up to +260°C. The usual heat transfer media, based on ethylene or propylene, tend to evaporate in such systems owing to the low boiling point of these glycols. They leave partially insoluble, salt-like residues that can lead to operating problems if the collector is frequently idle, which can result in failure of the system. The new product consists predominantly of higher-boiling, physiologically harmless, higher-molecular-weight glycols with a boiling point of over +290°C at 1030 mbar and so the above-mentioned residues do not occur.

• Based on propylene glycol and higher boiling glycols plus anti-corrosion additives
• Optimally use for solar heating systems exposed to high thermal loads
• Premixed with deionized water (frost resistance: -27 °C)
• Nitrite-, amine- and phosphate-free
• Typical applications:
  Solar heating systems, even highly stressed collectors with vacuum tubes