SS 316L manual butterfly valves (ISO9001:2000,CE,TUV certified) DN10-DN200,1/2"-8", ... customized SS304,SS316L 1.Description of DIN Sanitary male-male Butterfly Valve(1)Surface treatment: mirror polished 320G,400G or matt ... /male,weld/clamp,weld/male,clamp/male(9)Operation: 1) Manual, 2/3/4-position pulling handle, multi-position plastic/stainless ...