Antifrogen SOL HT & Antifrogen GEO

Antifrogen SOL HT is a specially designed heat-transfer fluid that allows solar heating systems with high thermal loads to avoid damage that can come from extreme heat excursions in stagnant zones. Developed in response to the increasing use of vacuum collectors in solar systems (which can have stagnation temperatures of 270°C and above), Antifrogen SOL HT offers protection up to 200°C for operating systems, and protection to 270°C for idle systems. Higher-boiling glycols in the fluid prevent evaporation that can impact the performance of traditional fluids based on low-boiling ethylene or propylene glycol; such evaporation can result in a buildup of salt-like residues, and cause related operating problems and maintenance problems. Anti-corrosive additives ensure optimal frost and corrosion protection down to –23°C, making the fluid compatible with standard metal and plastic components used in solar heating systems. Antifrogen GEO, a heat-transfer fluid based on 1,2-propylene glycol, is also available for use in near-surface geothermal systems at temperatures from –25°C to 50°C.