Victor Equipment single stage multi-flame Type 55 heating nozzle 300 series. Type: 55. Size: 8. Part #: 0323-0328. The type 55 series multi-flame heating nozzles feature a raised center point on the head to prevent bumping the plate and compressing the flame. The center point and improved mixed design combine to provide greater resistance to flashback and improved performance. Fuel Gas: All fuel gases Except Acetylene. Length: 11". Approximate BTU Per Hour:. 212,300 Propane