Lubricators may be filled while the system is under pressure. Maximum operating pressure is: 150 PSI at 125° Fahrenheit carbonate bowl. Operating temperature range is -10° Fahrenheit. For pressures up to 250 PSI at 175° Fahrenheit (maximum). 5 oz bowl capacity. WARNING: Oils with adhesives, compounded oils containing solvents, graphite, detergents or synthetic oils must not be used.