220764 - Hypertherm 220764 Shield, 260A Mild Steel for HPRXD Systems

Technical Analysis: Hypertherm 220764 Mild Steel Shield

The Hypertherm 220764 is a high-performance plasma shield engineered specifically for the HyPerformance® HPRXD® family of plasma cutting systems, including the HPR260XD, HPR400XD, and HPR800XD. Designed for use in mechanized cutting operations, this shield is rated for 260 Amps and is optimized for processing mild steel. As a critical component of the torch front-end assembly, the shield serves multiple thermodynamic and fluid dynamic functions that are essential for maintaining cut quality and prolonging the lifespan of the nozzle.

One of the defining technical features of the 220764 shield is its integration of Hypertherm's CoolFlow™ technology. In high-amperage plasma cutting (260A and above), thermal management is paramount. The CoolFlow design facilitates increased cooling fluid velocity and improved heat transfer away from the nozzle orifice. This reduction in operating temperature helps mitigate the erosion of the nozzle bore, thereby maintaining energy density and arc focus over a longer duty cycle. For industrial fabricators, this translates to consistent ISO 9013 Range 2 or 3 edge angularity for a greater number of pierces and cut inches.

The shield is manufactured from high-grade copper alloy, machined to tight tolerances to ensure concentricity with the nozzle and electrode. This concentricity is vital for the proper alignment of the plasma arc and the shield gas curtain. In mild steel applications, the 220764 shield assists in directing the shield gas to constrict the arc and protect the nozzle from molten blowback during piercing. It is designed to work seamlessly with the HPRXD's rapid process-switching capabilities and supports True Hole® technology where applicable, delivering bolt-ready holes with minimal taper. Proper installation and regular inspection of the shield orifice for spatter buildup are recommended to maintain optimal system performance.