... ,AISI316L. 3.DIN,SMS,ISO,IDF,AS,BS,BPE Standard. Sight glass (ISO9001:2008,CE,TUV certified) Specification: DN25-DN100,1 ... CO.,LTD",a ISO9001:2008 certified manufactory from China,specializes in producing kinds of sanitary valves,pipe fittings as well as ...