Buse Delavan 0.65GPH, 80W (1)

The Delavan 0.65GPH, 80W (1) nozzle is a precision oil nozzle coded under article 345.892.189 with manufacturer references P0065-80W1, 3042043, 3049040, and 345.892.189. It is listed under the category of oil nozzles and carries a flow rating of 0.65 US gallons per hour at the reference pressure, with a spray designation of 80W. Note that the numbering and letters on a nozzle indicate specific spray characteristics; for this article the given parameters are 0.65 GPH and 80W. Oil nozzles of this type atomise fuel oil into a fine conical spray so that it mixes with air and burns completely within the combustion head. They are precision consumable parts, meaning they should be replaced at regular intervals as part of burner maintenance. The nozzle sits at the end of the oil pump supply line and works together with the pump, solenoid valve, and, where fitted, a preheater to deliver a metered, atomised fuel charge. The spray pattern and angle determine how the flame is shaped relative to the blast tube and combustion chamber. When selecting a replacement nozzle of this class, the flow rate (GPH), spray angle (in degrees), and spray pattern (hollow, solid, or semi-solid cone) must all match the burner manufacturer’s specification. A nozzle with the correct flow but wrong pattern can cause sooting, pulsation, or unstable ignition. Always check the existing nozzle or the burner data plate for the exact rating. The thread type should also be confirmed; most domestic and commercial oil nozzles use a standard 1/8 inch NPT or BSP thread, but physical fit must be verified on site.