Delavan 85-80a1 Oil Burner Nozzle 0.85 Gph 80 Degree

Product Description

The DELAVAN 85-80a1 is a Type A hollow cone oil burner nozzle rated at 0.85 gallons per hour (GPH) with an 80-degree spray angle. It meters and atomizes fuel oil into a fine, hollow cone spray pattern, delivering consistent combustion performance in residential and light commercial oil-fired heating equipment. The hollow cone pattern distributes fuel along the outer edge of the spray envelope, which suits specific burner head geometries that require that flame shape. Licensed oil burner technicians and HVAC service professionals install this nozzle as part of routine annual maintenance or combustion tuning.

This nozzle is suited for oil-fired boilers, oil furnaces, and water heaters that call for a 0.85 GPH flow rate at an 80-degree hollow cone spray pattern. It is installed at the end of the fuel unit assembly inside the burner drawer or gun assembly. Selecting the correct GPH rating, spray angle, and pattern type is critical to achieving proper combustion efficiency and avoiding incomplete burn, excessive smoke, or heat exchanger fouling.

Key Features

• 0.85 GPH flow rate for precise fuel metering in low-to-mid input burner applications
• 80-degree spray angle for wide flame profile burner chambers
• Type A hollow cone pattern concentrates atomized fuel at the outer spray perimeter
• Designed for use with No. 1 and No. 2 fuel oil
• Compact nozzle body for standard oil burner gun assembly installation

Compatibility

Designed as an OEM-style replacement nozzle for oil burners requiring a 0.85 GPH, 80-degree, Type A hollow cone specification.

Installation Notes

Oil burner nozzles are installed by licensed oil burner technicians or qualified HVAC service professionals. Always shut down the burner and de-energize the primary control before accessing the gun assembly. Use a proper nozzle wrench to avoid damaging the nozzle body or adapter; do not overtighten. After replacement, a combustion analysis with a flue gas analyzer is recommended to verify CO2, oxygen, and smoke number readings before returning the system to service.