Abstract: A web rewet moisture actuator in which a plurality of air atomizing nozzles at spaced locations along a boom extending across the web are supplied with air under pressure by an air manifold on the boom and are supplied with water from a water manifold on the boom through respective proportional valve assemblies which permit flows therethrough in proportion to the magnitudes of control signals applied to the assemblies. A unit located downstream of the boom obtains a moisture profile across the web from which location and control signals are derived and fed to the valve assemblies to control the liquid flow through the valve assemblies in proportion to the magnitudes of the control signals.