... s.s c.s DN:2"~48". Disc: Ni-plated ductile iron, Nylon coated ductile iron, 304S. S, 316S. Body: Cast iron, carbon steel, 304S. S, 316S. S ... Neoprene Disc: Ni-plated ductile iron, Nylon coated ductile iron, 304S. S, 316S. Body: Cast iron, carbon steel, 304S. S, 316S. S and aluminum ... EPDM, food grade EPDM, NBR, abrasive Shaft: 416S. Sand316S. S, 17-4pHS, aluminum bronze and monel.resistant NBR, Viton, ...