Delavan Oil nozzle 30609-003

The Delavan 30609-003 is an oil nozzle used in pressure-jet oil burners. It atomizes fuel oil into a fine spray cone for complete combustion. This precision consumable is installed at the end of the oil pump supply line within the burner's combustion head. Its performance is critical for flame development and stability. The nozzle's specifications (flow rate, spray angle, and pattern) must be confirmed from the burner's documentation or the nozzle's markings, as they are not stated for this item.

Oil nozzles of this type are selected based on three parameters: flow rate (in US gallons per hour or kilograms per hour at a reference pressure, typically 7 bar/100 psi), spray angle (ranging from 30 to 80 degrees), and spray pattern (hollow, solid, or semi-solid cone). The thread size may vary between nozzle ranges, so it must be checked against the burner's nozzle line. Before ordering, all three parameters must match the burner manufacturer's data plate. Replacement involves installing the nozzle at the end of the oil pump supply line, inside the combustion head, directly in front of the blast tube.

When oil nozzles of this kind fail or are incorrectly matched, common symptoms include sooting, pulsating combustion, or delayed ignition. These issues can arise from wear or from using a nozzle with the correct flow rate but wrong pattern. Cleaning is not recommended; replacement with an identical part or exact equivalent is standard practice. If such symptoms occur, check the nozzle's markings and compare them to the burner's specifications.