Delavan Oil nozzle 00650-45W7

This Delavan oil nozzle, model 00650-45W7, is a precision consumable component for oil burners. It delivers a fuel capacity of 6.5 gallons per hour with a 45° spray angle and W spray pattern. The nozzle atomizes fuel for mixing with combustion air. It is compatible with pump solenoids and preheaters.

For oil nozzles of this kind, selecting a replacement requires matching three parameters to the burner data plate: flow rate in gallons per hour, spray angle, and spray pattern. Use the markings on the original nozzle as a guide. After confirming these, install the nozzle by threading it into the oil pump or gun assembly, taking care not to overtighten.

When an oil nozzle of this kind wears or is incorrectly selected, symptoms may include sooting, flame pulsation, unstable ignition, or burner lockout. Excessive carbon buildup can occur around the nozzle. A failing nozzle may also cause poor combustion efficiency. Checking the nozzle for wear and confirming its rating are standard steps when these symptoms appear.