Fluidics W1-250-60 nozzle

This is an oil nozzle from Fluidics, catalogue article 480.892.100. Parts of this type are precision consumables that atomise fuel oil into a fine conical spray for complete combustion. The nozzle is installed in the burner head and works together with the oil pump, solenoid valve and, where fitted, a preheater. Its condition directly affects flame shape, stability and combustion efficiency. Such nozzles are selected by three parameters that must match the burner data plate: flow rate in US gallons per hour (GPH) or kilograms per hour at a stated reference pressure, spray angle (typically 30 to 80 degrees) and spray pattern (hollow, solid or semi-solid). The thread size must also be correct for the burner head. Using a nozzle with the correct rating but a wrong pattern can cause sooting, pulsation or unstable ignition. When replacing, confirm that all three parameters on the existing nozzle match the original specification; a change in any one may require re-setting the air damper and re-checking combustion values.