Delavan Oil nozzle P0085-60W5

The Delavan Oil nozzle P0085-60W5 is a precision consumable component used in oil burners. It atomizes fuel oil into a fine spray to enable complete combustion within the combustion head. This nozzle has a capacity of 0.85 gallons per hour (GPH) and a spray angle of 60 degrees. The spray pattern is designated as W. It is a wear item that should be replaced during burner service, not cleaned for reuse.

Parts of this type are selected by three parameters: flow rate (in US gallons per hour at a reference pressure), spray angle (typically between 30 and 80 degrees), and spray pattern (hollow, solid, or semi-solid). When replacing an oil nozzle, all three parameters must match the burner manufacturer's specification. Thread size must also match the nozzle adaptor on the burner; common threads are 1/8" BSP or NPT. Always verify the GPH rating, spray angle, and pattern against the burner data plate before ordering.

A nozzle with the correct flow rate but a wrong pattern or angle will cause sooting, unstable ignition, or pulsation. These symptoms indicate that the nozzle is not atomizing fuel correctly, leading to incomplete combustion. Regular inspection and replacement of the nozzle as part of burner service can prevent these issues.