Delavan 0.50GPH, 80W (4) nozzle

Delavan 0.50GPH, 80W (4) nozzle, catalogue article 345.892.082. Manufacturer codes include P0050-80W4, 3042039, 3049033, and 345.892.082. This is an oil nozzle, a precision consumable part that atomises fuel oil into a fine spray so it can burn completely in the combustion head. In an oil burner system, the nozzle is located downstream of the oil pump and solenoid valve; the pump supplies pressurised oil, and the nozzle converts it into a cone-shaped mist that mixes with combustion air. Parts of this type are selected by three parameters that must match the burner manufacturer's data plate: the flow rate in GPH at the reference pressure, the spray angle (typically 30 to 80 degrees), and the spray pattern (hollow, solid, or semi-solid). Using the correct flow rate with a wrong pattern can cause sooting, pulsation, or unstable ignition, so all three parameters must be verified. The thread size is also specific to the burner. Because the nozzle is a wear item, it should be replaced at intervals specified by the burner maintenance schedule. The specific article is a Delavan 0.50GPH, 80W (4) nozzle. As with all oil nozzles, its role is to define the flame shape and distribution; the angle and pattern designation (here 80W) indicate the spray characteristics for that particular nozzle. Always refer to the burner plate to confirm that the rating, angle, and pattern are correct for the application.