IDF butterfly valve(male butterfly valve, BS4825 PT 4 valves) ISO9001:2008,CE,TUV certified, CNC machined. export ... to UK. USA IDF butterfly valve(male butterfly valve, BS4825 PT 4 valves)Material quality: AISI304, 316L Standard: DIN/SMS/ISO ... DIN, SMS, ISO9000. IDF butterfly valve(male butterfly valve, BS4825 PT 4 valves)