278987 - Miller XT Plasma Torch Cup O-Ring Replacement Kit

Genuine Miller Replacement Seal for XT Plasma Torches

The Miller 278987 Kit, O-Ring XT Torches Cup is a critical maintenance component designed specifically for Miller's XT series plasma torches. In plasma cutting systems, the integrity of the gas seal between the torch body and the retaining cup is paramount. A compromised O-ring can lead to gas leakage, resulting in a drop in system pressure, turbulent flow, and ultimately, poor cut quality or machine fault codes. This genuine OEM part ensures that your equipment operates within the manufacturer's specified parameters for safety and performance.

Constructed from durable, heat-resistant materials, this O-ring is engineered to withstand the thermal cycling and harsh environment typical of industrial plasma cutting. It fits precisely onto the torch head, creating a secure seal when the retaining cup is tightened. Regular inspection of this O-ring is recommended during consumable changes; if signs of cracking, drying, or deformation are present, immediate replacement is necessary to prevent damage to the torch threads or internal components.

This kit is compatible with the XT line of torches commonly found on Miller Spectrum plasma cutters (such as the XT30, XT40, and XT60). By using genuine Miller parts, operators ensure the longevity of their torch and consistent arc stability. The kit includes the specific O-ring required for the cup assembly, allowing for a quick and straightforward repair that minimizes downtime in the workshop.