The Compresyn® 550 Series is a synergistic blend of synthetic polyglycols, esters and selected additives compliant with 21 CFR 178.3570 and authorized as a “Lubricant with Incidental Food Contact” (USDA/NSF H1). Compresyn 550 is formulated to provide superior performance and extended drain capabilities in rotary screw compressors while providing an H1 replacement for nonfood-grade polyglycol/ester compressor lubricants.