Monarch Oil nozzle 0984721

The Monarch Oil nozzle 0984721 is a precision consumable for oil burners, atomizing fuel into a fine cone for complete combustion. It has a capacity of 3 gallons per hour, a spray angle of 45 degrees, and a spray pattern of HO. The nozzle is designed for use with oil of 70 SSU (approx. 13 centistokes) operating viscosity. It is installed at the end of the burner's blast tube, receiving pressurized oil from the pump via the solenoid valve.

When selecting a replacement oil nozzle of this type, the flow rate, spray angle, and spray pattern must match the burner data plate. The thread size must also match the nozzle holder. Nozzles are not interchangeable by flow rate alone; all parameters must be verified. Handle the nozzle by its hexagonal body to avoid damaging the tip.

Using a nozzle with an incorrect spray pattern can cause sooting, flame pulsation, or unstable ignition. Debris in the nozzle orifice will distort the spray pattern, leading to poor combustion. Check the nozzle for blockages or damage if the burner exhibits these issues.