Positive Crankcase Ventilation Valve

Positive Crankcase Ventilation (PCV) Valve is a component of the engine's emission control system. It is designed to regulate the flow of gases from the crankcase back into the intake manifold.

The PCV valve helps to prevent the buildup of pressure inside the engine crankcase, which can lead to oil leaks and other engine problems. It also helps to reduce harmful emissions by directing the crankcase gases back into the combustion chamber to be burned off.

In the supply class Miscellaneous Engine Accessories, Nonaircraft, the PCV valve is categorized as an engine accessory that is not specific to aircraft engines. It is commonly used in various types of nonaircraft engines, such as those found in cars, trucks, motorcycles, and other vehicles.

Overall, the PCV valve plays an important role in maintaining the proper functioning of the engine and reducing emissions.