Fluidics W1-90-45 nozzle

This is an oil nozzle from the Fluidics brand, listed under the catalogue category of oil nozzles. The nozzle is a precision component that atomises fuel oil into a fine spray cone, enabling complete combustion within the burner head. It is a consumable part: over time, wear or carbon deposits affect the spray quality, making replacement part of routine burner maintenance. Parts of this type are selected by three parameters that together define how the flame sits in the combustion head: the flow rate (given in GPH or kg/h at a reference pressure), the spray angle (typically between 30 and 80 degrees), and the spray pattern (hollow, solid, or semi-solid). All three must match the values on the burner data plate. Using a nozzle with the correct flow rate but the wrong pattern can cause sooting, pulsation, or unstable ignition. The thread size must also be compatible with the oil pump line. In a typical oil-fired system, the nozzle is mounted at the end of the blast tube. It receives pressurised oil from the pump via the solenoid valve; on some systems a preheater is used for heavier grades. The nozzle works together with the air damper and the combustion head geometry to shape the flame. When replacing a nozzle of this type, check the existing part number for the flow rate, angle, and pattern markings, and fit a replacement with identical specifications.