The ZK series perfluoropolyether (PFPE) oils feature high thermal stability, high chemical stability, low vapor pressure, low volatility, no flash point, excellent lubricity, broad material compatibility, outstanding radiation stability, chemical inertness, and non-toxicity. Compared with conventional CFC/HCFC lubricants, PFPE oils offer a significantly wider service temperature range and avoid the drawbacks of easy evaporation at high temperatures and thickening at low temperatures. As PFPE molecules contain no chlorine, they will not corrode equipment surfaces under pressure during operation.