阀体、上盖Valve body, upper cap
碳钢、不锈钢Carbon steel, stainless steel
阀板Valve plate
不锈钢stainless steel
阀杆Stem
密封圈Seal ring
橡胶、四氟、不锈钢、硬质合金Rubber, PTFE, stainless steel,hard alloy
