The first oil burner nozzles were made by Monarch in the year 1926 when the Burner Industry was still in its infancy. Since then Monarch has made millions of nozzles for use by different Burner manufacturers across the world and contributed to better combustion efficiencies.PLP series nozzles starting from 0.4 Gph up to 100 Gph,R series up to 2 Gph,HO nozzles up to 100 Gph,Anti drip valves for oil nozzles