Tech Brief: Mechanical Vacuum Pump Oils For Use In Freeze Drying Systems

In attempting to write a general engineering specification for vacuum pump oils to be used in Hull Company freeze drying equipment, many types of oils were encountered from many different manufacturers all claiming different things about what seemed to be the same oils. To help sort through this confusion, it was found useful to classify the oils into general categories. It is hoped that this information will be helpful in determining which vacuum pump oil is correct for your application.