... .CI,DI,SS,WCB,ALB, BRASS,etc. 5.lever,gear,electric,pneumatic driver Stainless Steel Concentric Soft Seal Butterfly Valve with PTFE seatDN50-DN1200 ... ,Alkalis, etc.Material List: Part Name Material BodyCI/DI/WCB/SSDiscDI/ALB/WCB/MONEL/CF8/CF8MStemSS416/SS304/SS316/WCBSeatEPDM/BUNA/NBR/NR ... find what you want from our catalogue as below: Wafer Type Stainless Steel Butterfly Valve