Delavan Oil nozzle 30609-009

The Delavan Oil nozzle 30609-009 is an industrial air-siphon type nozzle designed for fuel atomization in heating systems and burners. Its type designation is SNA .85, indicating a siphon type design that produces a uniform solid cone spray with fine fuel droplets. This nozzle is suitable for applications requiring efficient atomization at low air pressure, including systems using heavy or waste oils. It is a precision consumable component that fits into the burner's combustion head and is driven by the oil pump.

Parts of this type are selected by matching the nozzle's rating (flow rate at a reference pressure), spray angle, and spray pattern (hollow, solid, or semi-solid) to the burner data plate. The thread size must also correspond to the burner adapter. Before ordering, verify the existing nozzle's stamped rating, angle, and pattern, and confirm the replacement offers the same values.

When nozzles of this kind fail, common issues include sooting, pulsation, or unstable ignition due to incorrect spray pattern or clogging. The equipment may exhibit incomplete combustion, increased fuel consumption, or visible smoke. Check the nozzle for wear, blockage, or damage, and ensure it matches the required specifications.