Delavan Oil nozzle 00400-80B7

The Delavan Oil nozzle 00400-80B7 is a precision consumable part designed to atomize fuel oil into a fine spray for complete combustion in oil burners. It has a capacity of 4 gallons per hour (GPH) and a spray angle of 80 degrees. The spray pattern is type B. This nozzle is fitted into the burner's combustion head and connected to the oil pump via the high-pressure oil line. It is identified by SKU 00400-80B7 and also referenced as 3042173 and 345.892.127.

Parts of this type are selected by three parameters: flow rate (in USGPH at the reference pressure), spray angle, and spray pattern (hollow, solid, or semi-solid). All three must match the burner manufacturer's data plate. Before ordering, verify the code against the existing part or the burner manual. The thread size is standard for domestic and light commercial oil burners.

When a nozzle of this kind fails or is incorrectly matched, it can cause sooting, pulsation, or unstable ignition. Combustion readings may drift, indicating the need for replacement. Debris or damage to the orifice will distort the spray cone, leading to poor combustion. Regular inspection and replacement at scheduled service intervals are necessary to avoid these issues.