... :2008 3.Sell to Europe,Africa,South America. 4.EPDM seat ISO9001 Cast Iron Gate Valve Specification:1. Size: 1-1 ... 10 Table E4. Disc: Grey iron, Ductile iron, with or without EPDM5. Seat: Stainless steel, Brass/Bronze etc6. Testing: API 598, ISO ... Grey iron, Ductile iron, Carbon steel, Stainless steel, with or without EPDMSeatEPDM / NBR / VITON / PTFEStemStainless steel, Brass/Bronze etc BushingPTFE"O ...