Fast All-metal Six-inchvalve"

A stainless steel, six-inch valve capable of closing in apprcximately 10 milliseconds has been developed at the Stanford Linear Accelerator Center. The valve will be automatically and zemotely operable, allowing it to be used in the S:dC be:nl switchyard area where high radi,tion levels wil:. prohi,it personnel pccess. The 7roblLdns of '.rigge-ing mechanical release, Lalve gute acceleratior and deceleration, and vacuum sealing without elastomers appear to be solved.