Crankcase Ventilation Filter Assembly

摘要

A pressure control valve assembly, (i.e. pressure regulator valve assembly) is described which is configured for at least a two stage operation including: a first stage in which flow is allowed through two sections of a valve frame (48); and, a second stage in which a valve member (43) is biased against one of the sections of the valve frame (48) and not the second section. Specific example features and configurations are depicted and described. A crankcase ventilation filter assembly including a housing (2), a filter cartridge (6) and a pressure control valve assembly (45) is also described.