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The Hypertherm 120791 is a genuine OEM 200-ampere oxygen swirl ring designed for the HT4400 mechanized plasma cutting system. It functions as a gas diffuser and vortex generator, utilizing machined angled micro-ports to introduce a high-velocity swirl into the primary oxygen plasma gas stream. This component is constructed from hydros aluminum silicate ceramic to provide electrical insulation and thermal stability during high-duty-cycle automated cutting operations.
Features
Angled Metering Orifices: Precisely machined radial ports for near-sonic gas velocity injection.
Centrifugal Arc Compression: Spins gas to throw un-ionized cold oxygen outward to protect the inner nozzle wall.
Dielectric Strength: Functions as a structural insulator separating the negatively charged electrode from the nozzle assembly.
Zero Thermal Expansion: Maintains rigid dimensional tolerances under severe radiant heat to prevent gas port distortion.
Chemical Inertness: Resists high-pressure oxidation in pure oxygen environments.
Bevel Control: Clockwise swirl orientation places the squarest edge on the right side of the torch path.
Fluid-Dynamic Vortex: Constricts and centers the multi-kilowatt plasma arc for kerf consistency.
