The ABXZ Series Dual Fuel Burner is a versatile device that runs on both gas (natural gas, LPG, biogas, or producer gas) and heavy oil (furnace oil or pyrolysis oil). A fuel selector switch allows for easy switching between fuels, enabling users to take advantage of cheaper fuel prices and minimize plant downtime in the event of a short supply. The burner features a unique sequence controller that efficiently manages the gas and oil flames while respecting safety values.