API 6A Mud Gate Valve 1.Size:2"-5" 2.Pressure:1000psi,3000psi,5000psi 3.Material Classes DD, EE, FF, to NACE MR-01-75 mud gate valve, API 6A gate valveSerial No.NameMaterialSerial No.NameMaterial1Valve bodyAISI 4135/413011Rubber ringNBR2Valve coreNBR/Viton12Fastening cap4130.003Valve gate13Cr/5140+Ni420/31613Valve stem nut5,1404Valve stem420/31614Supporting frameAISI 10405O-ringNBR15Dust proof ...