Product Details  Stop Valve With Bellow Seal Standard and regulation Design and ManufactureGB/T12224-98; GB12229-89; GB12230-89;  GB12231-89; GB12235 Face-to-face-dimension: JB96-95 or GB12221-89 (1 and 2 Series) Flange Connection dimension:JB/T79.1-JB/T79.4-94 or HGC20592-97 Applicable temperature: Carbon Steel (≤425); Stainless steel (Different raw material for different medium)  Inspection and test: GB/T13927-92 or API598 Material: GB/12229; GB/T12230 Main Material: WCB; CF8; CF8M; CF3; CF3M