Greaseless, high-temperature vacuum seals for the ZT-40. [Viton]

Viton rubber O rings to be used in the plasma-containment vessel of the ZT-40 torus were molded and tested for their sealing ability. To meet the stringent requirements for these parts, the mold design and mold surface preparation should adhere strictly to the Viton manufacturer's recommendations. In addition, the molding stock must be worked either by injection molding or by a preprocess such as extrusion.