... iron, Ductile iron, with or without EPDM5. Seat: Stainless steel, Brass/Bronze etc6. Testing: API 598, ISO 52087. Options: Lever, Gearbox ... gasParts & Materials: PartsMaterialsBodyGrey iron, Ductile iron, Carbon steel, Stainless steelDisc Grey iron, Ductile iron, Carbon steel, Stainless ... , Brass/Bronze etc BushingPTFE"O" ringNBR, PTFELevelMalleable iron, Carbon steelContact: Ms. Annie Tel: +86-311 ...