Danfoss Oil nozzle 0.85GPH,80H 030H8918

The Danfoss 030H8918 is an oil nozzle with a flow rate of 0.85 GPH, a spray angle of 80°, and an H spray pattern. It is a metering and atomising component used in oil burners, where it breaks the fuel supply into a fine spray for combustion. The 0.85 GPH rating defines the volume of oil delivered per hour at the nozzle's rated pressure. The 80° angle sets the width of the spray cone, and the H pattern denotes the shape of the spray distribution. It belongs to the oil nozzle category under the Danfoss brand.

Nozzles of this type are selected by matching the flow rate, spray angle, and spray pattern to the burner's requirements, and by confirming the thread and mounting form suit the nozzle holder. The seat and the mating face must be clean and undamaged before the replacement is tightened, since the seal is made metal to metal at the nozzle body. The flow rate, angle, and pattern markings on the old nozzle should be read and compared with the specification before ordering. Over-tightening is avoided, as it can distort the seat and alter the spray.

Nozzles of this kind commonly fail through clogging of the internal passages or the orifice, through wear of the orifice that increases flow, or through a distorted or leaking seat. The equipment may then show a weak, uneven, or misdirected flame, delayed ignition, sooting, or a rise in fuel consumption. Checks typically include the flame shape and colour, the combustion readings, and the condition of the nozzle strainer and seat. A nozzle that has been in service is generally replaced rather than cleaned, since the orifice cannot be restored.