Moisture extractors are a chemical mist elimination device, usually installed vertically in the duct of a local exhaust system. This device utilizes a set of angled stationary blades. As the air stream passes through these blades they cause a cyclonic flow within the vessel. This cyclonic flow propels the liquid droplets outward, impinging onto the inner walls of the vessel. Thus, the liquid collects at the bottom of the vessel where it is drained away from the air stream. Many of these Mist Eliminators also incorporate spray header systems for periodic cleaning and recovery of the chemistry.