... :2008, 27/93 EC 4)Established in 1987 Double flange butterfly valveSizeRange:DN25~DN3500 Class Range:150LB-900LB Structure:butterfly ... Stainless Steel AndOther Materials Available To OrderEnd Connection: Flanged, Screwed, Socket Weld Or Butt Weld OfferedProducts: We can produce gate, globe, check ... the ISO 9001 as the minimum standard to maintain. flange connection butterfly valve with split body