Delavan 1.25GPH, ugello 60W

This oil nozzle, from Delavan, is a precision consumable component that atomises fuel oil into a fine spray for complete combustion. The nozzle is rated at 1.25 GPH with a 60‑degree spray angle, as indicated in its designation. In the burner system, the nozzle is mounted in the combustion head and fed by the oil pump; its spray pattern and angle directly define the shape and position of the flame within the blast tube. Because it is a wear item, a new nozzle should be fitted during routine burner servicing or whenever combustion symptoms such as sooting or unstable ignition appear. When selecting a replacement, three parameters must exactly match the burner data plate: flow rate (1.25 GPH in this case), spray angle (60°), and spray pattern (hollow, solid, or semi‑solid). The thread type is also fixed by the burner design. Using a nozzle with the correct flow and angle but the wrong pattern can cause poor atomisation, pulsation, or delayed ignition. This nozzle’s pattern is not stated in the catalogue entry, so the engineer must verify the required pattern from the burner manufacturer’s specification before fitting. Because the nozzle works in conjunction with the oil pump, solenoid valve, and any preheater, check that the pump pressure and nozzle flow rating are compatible. A worn or incorrectly selected nozzle will affect flame proving and may lead to lockout. Always confirm that the new nozzle is a direct replacement by comparing the manufacturer code (00125-60W1) with the original part.