... self-priming pump adopts acid-resisting stainless steel in valve body,which has unique and alkali resistance and comply with ... pump etcsanitary valves: sanitary mix-proof valve,diaphragm valve,butterfly valve,ball valve,tank bottom valve,check valve and so on.pipe fittings: unions ... 3A,IDF,ISO and BS or as per customers’ special requirements standardstainless steel material grade including 304,304L,316 ...