... : DN50 - DN14002)Pressure: PN1.0/1.6 MPa3)Materials:body-DI,WCB,Stainless Steel disc-D Double Flange Butterfly Valve:SizeDN40 ... flangeEN1092 ,ANSI 125/150# ,DIN2501Face to faceEN 558-1, BS5155 , ISO 5752Top flangeISO 5211BodyDuctile iron,Stainless steel,WCBDiscDuctile iron,CF8,CF8M ... with the standards of GB, ASME, ANSI, API, BS, DIN DI Butterfly valve