Delavan .55 GPH 80° Type W Oil Burner Nozzle Hollow/Solid Spray

Type W nozzles are a hybrid design, combining features of both hollow and solid cone nozzles. They can often substitute for either type in flow ranges from 0.55 to 80 GPH, regardless of the burner's air pattern. At lower flow rates, their spray tends to be more hollow, while at higher flow rates, it leans toward a solid pattern.