Dual flow plasma (unshielded) This process utilizes two gases; one for the plasma and one as a shield gas. In smaller systems (under 125 amps), compressed air is often used as both the plasma and shield gases. Dual gas unshielded systems have an exposed nozzle and should not be used for drag cutting. Dual flow plasma (shielded) This process uses two gases, a plasma gas and a shield gas. In.. Shielded parts provide longer consumable life, better cut quality, as well as the ability to pierce thicker. The only reason to use unshielded is when you are cutting parts that require close access of the torch..the unshielded consumables are pointier.
The primary consumables used..for the majority of cutting applications..arethe shielded parts. These parts dramatically improve cut quality and consumable life.and allow dragging on the plate at all amperage levels..resulting in better cut quality and ease of use.. hypertherm powermax 65 w/ machine torch, water table and candcnc dthc when should i use shielded consumables? when should i use unshielded consumables? up to now i've only tried the shielded unless using finecut and i just noticed there is a shield for finecut too the manual shows setups for both shielded and unshielded for a machine torch. the manual does say that unshielded tips have a.