... , cast iron body (DI 8"-12"), 316ss disc, 316ss stem, EPDM or NBR seat, 10-position notch plate & lever-rated 16 bar ... : Various seats…viton, neoprene, ept, silicon, hypalon. 304 or 410ss stem, Aluminium bronze or DI nylon coated disc, Ductile iron body, Undercut ...