Buse Delavan 22.00GPH, 60B

This is a Delavan oil nozzle, catalogue article 345.892.218, with a nominal flow rating of 22.00 GPH and a designation of 60B. It belongs to the category of oil nozzles, which are precision consumable components in oil-fired burners. The nozzle atomises the fuel oil into a fine spray cone so that it can mix with combustion air and burn completely. A nozzle of this type is selected by three parameters: flow rate (given in US GPH at the reference pressure), spray angle (typically between 30° and 80°), and spray pattern (hollow cone, solid cone, or semi-solid). The designation 60B is part of the part number but its exact meaning is not decoded here. When replacing a nozzle on an oil burner, the replacement must match the original in flow rate, angle, and pattern. Using a nozzle with the correct rating but a different pattern can cause sooting, pulsation, or unstable ignition. Conversely, a correct pattern with an incorrect rating will affect the heat input. Burners of this class rely on the nozzle to deliver the right droplet size and spray shape for the combustion head design. Always check the burner data plate for the specified nozzle parameters before fitting a new one.