Inventors:
Harold F. Honath - Coraopolis PA
Gebhart J. Reiling - Pittsburgh PA
Robert H. Swinderman - Mars PA
Richard E. Hills - Coraopolis PA
Assignee:
Pittsburgh-Des Moines Corporation - Pittsburgh PA
International Classification:
E04H 720, G21C 1308
Abstract:
A seal joining a vacuum vessel head to a shell includes a flange on the head and a flange on the shell with a seal ring interposed therebetween. Spacers transfer the weight of the head and the vacuum load in the vessel to the seal ring. A sealing skirt attaches to the head flange and to the seal ring.