Detailed Product Description Size: 2"-40" Pressure Rating: CLASS150/CLASS300 Cast gray steel , ductile iron , A216 WCB , 304SS,316SS. CF8M Size: 2"-40" Pressure Rating: CLASS150/CLASS300 Connection end: Flanged end /Wafer end/Lug end butt-welded ends Body : Cast gray steel , ductile iron , A216 WCB , 304SS,316SS. CF8M Disc: Cast gray steel , ductile iron , A216 WCB , 304SS,316SS. CF8M Seat : BUNA,EPDM ,PTFE ,NBR.SI,FIPM Stem : 316SS , 410SS, 416SS Packing : soft graphite , fluorine plastic Actuation: Lever/ Gear Box Application: Offshore /Oil /Gas chemical /Petrochemical Pulp /Paper /Water /Wastewater /Marine Notes: The specifications can be designed and satisfied for customers' special requirements We have obtained Certificates of CE, API 6D, API 607, TS and ISO 9001