In a world that expects liquid fuel stoves to have one setting (hot), the Dragonfly stands out. Since its debut in 1998, it has won numerous awards for its innovative dual-valve design, which offers an unrivaled range of continuous and immediate flame control. Simmer a delicate sauce over a candle flame or melt snow quickly over a blowtorch with a twist of the flame adjuster. This stove continues to provide unbeatable performance and is extremely popular with those serious about their outdoor pursuits. CoolFuel Valve. The first ever dual-valve design offers an unrivaled range of flame control.