Delavan 8.50GPH, 80B nozzle

The Delavan 8.50GPH, 80B nozzle is an oil nozzle for use in domestic and light commercial oil burners. The catalogue article is 345.892.276; the manufacturer code is 00850-80B7 (also listed as 345.892.276). This part belongs to the class of oil nozzles that atomise fuel oil into a fine spray cone so that the flame burns completely. An oil nozzle of this type is a precision consumable component. Its three key selection parameters are flow rate, spray angle and spray pattern. The flow rate is given in US gallons per hour (GPH) at a standard reference pressure; the spray angle (here 80 degrees) determines how the flame spreads inside the combustion head; and the spray pattern (hollow, solid or semi-solid) controls the distribution of the oil droplets in the cone. All three parameters must match the burner data plate. A nozzle with the correct flow rate but the wrong pattern can cause sooting, flame pulsation or unstable ignition. When replacing a nozzle, always check the original part number or the burner manufacturer’s specification for the exact rating, angle and pattern. The thread size is standard for this nozzle type, but it is good practice to verify compatibility with the burner’s nozzle adapter before installation.