Cylinder Oil 600 W What Is For, What Will It Do 1920

GARGOYLE CYLINDER OIL 600 W Flash point is the temperature at which vapor from the heated oil flashes, i.e., ignites momentarily upon the application of a flame. The flash point is determined in the laboratory under atmospheric pressure. Since there is no air present in steam there can be no flash at any temperature. It is, therefore, possibleto use a cylinder oil successfully under superheated steam conditions, where the temperature of the steam is a good deal higher than the flash point of the oil, measuretf under atmospheric condi- tions. It is by no means certain that a cylinder oil is suit- able simply because it possesses a high flash point. Viscosity reading (by the Saybolt instru- ment) is the time in seconds which it takes for 60 cubic centimeters of an oil to flow at defmite tempera- ture through an orifice of definite dimensions. The viscosities of cylinder oils at ordinary temperatures differ considerably, some oils being quite sluggish and others quite fluid. As the temperature, of interiör surfaces of steam engine cylinders, is from 385° F. to 700° F., it will be ap- parent that the ordinary laboratory tests of the viscosity of cylinder oils, generally taken at 212° F., are useless for the purpose of judging the lubricating properties of cylinder oils. In faet, neither the gravity, flash point, nor the vis- cosity of a cylinder oil is any criterion as to the lubricating quality of the oil when applied to actual work. Compounded Cylinder Oils For most operating conditions experience has proved that cylinder oils compounded with the proper kind and amount of fixed 6