... PN16), BS 10 Table E4. Disc: Grey iron, Ductile iron, with or without EPDM5. Seat: Stainless ... and drainage, Electric power, Petrochemical, Metallurgical, Firefighting / Fire fighting, or other industries. Pressure Testing & Quality Control: ... and gasParts & Materials: PartsMaterialsBodyGrey iron, Ductile iron, Carbon steel, Stainless steelDisc Grey iron, Ductile iron, Carbon steel, Stainless steel ...