We are offering wafer type lined butterfly valve technical specification design standard : bs en 593:2004 (formerly bs 5155) drilling : ansi b16.5 din pn1016 face to face : api 609 din 3202 k1 bs 5155 iso 5752 bs en 558-12 lining thickness : 3 to 5 mm testing standard : bs en 12266-1&2