Industrial Z-D20596 Pressure Switch Unloader Valve unloads the compressor by venting air from the discharge line when the pressure switch opens, allowing the motor to start under no-load conditions. This part is identified by Z-D20596, DAC-278-1, and D20596 and is described as a Devilbiss Craftsman pressure switch unloader valve. It is intended for use with Devilbiss Craftsman pressure switch assemblies in industrial air systems, providing the unloading function within the control scheme.
