Delavan Oil nozzle 30609-049

The Delavan 30609-049 is a fuel-oil nozzle from the Delavan brand, identified by SKU 30609-049. As an oil nozzle, its role is to atomise fuel oil into a fine, controlled spray cone so it burns completely within the combustion head. It meters and shapes the fuel spray, directly affecting flame stability, combustion efficiency, and the risk of sooting or pulsation.

For oil nozzles of this class, selection is based on three critical parameters read from the burner data plate: flow rate at reference pressure (typically in USGPH or kg/h), spray angle (commonly 30–80 degrees), and spray pattern (hollow, solid, or semi-solid cone). The thread size must also match the burner adapter. If the original nozzle is unreadable, consult the appliance manufacturer's documentation or measure the existing part with a nozzle gauge and angle protractor.

Failures common to this type of nozzle include blockage or damage to the orifice or spray cone, which degrades spray quality. As a result, the burner may experience ignition failure, unstable flame, excessive carbon deposits, or pulsation. In such cases, inspect the nozzle for contamination, wear, or distortion and replace it if needed.