Clays and Minerals are processed in our up-to-date plant where we employ a state-of-the art technology. A smoothly dovetailed series of operations and strict, on-line quality control turn these gifts of earth into refractories for lining industrial hearths in which, volcanic fires burn with hellish fury....refractories which we produce in our plant, the refractories which have earned a reputation for total reliability, refractories which bear our name....VALLEY....the hallmark of excellence.