The Hypertherm 028872 is a specialized heat transfer fluid engineered specifically for liquid-cooled plasma cutting systems. This solution consists of a precise mixture of 75% deionized water and 25% pure propylene glycol. Unlike standard industrial coolants or automotive antifreezes, this formulation is strictly controlled to maintain low electrical conductivity. High conductivity in cooling fluid can lead to hard-starting of the main arc, resistive heating within the torch leads, and rapid electrolytic corrosion of the cooling passages within the torch body and cathode.<\/p>\n
This 1-gallon container provides a ready-to-use refill for Hypertherm systems such as the HPR, HPRXD, and XPR series. The 75\/25 ratio is optimized for environments where the ambient temperature does not drop below +10\u00b0F (-12\u00b0C). The propylene glycol component serves two primary technical functions: it depresses the freezing point of the water to prevent catastrophic expansion damage during storage or operation in cool environments, and it acts as a lubricant for the positive-displacement vane pumps typically found in these high-performance power supplies. Furthermore, the solution contains specific inhibitors that prevent the growth of biological agents (algae\/bacteria) and mitigate the oxidation of copper and brass components within the cooling loop.<\/p>\n