SMS butterfly valve(clamp butterfly valve, sanitary valves) ISO9001:2008,CE,TUV certified, CNC machined. export to UK. ... USA SMS butterfly valve(clamp butterfly valve, sanitary valves)Material quality: AISI304, 316L Standard: DIN/SMS/ISO/IDF/3A ... DIN, SMS, ISO9000. SMS butterfly valve(clamp butterfly valve, sanitary valves)