... as follows: 1) Butterfly valve: threaded butterfly valve, quick-installed butterfly valve, welded butterfly valve, flange butterfly valve, ... welded butterfly valve, pneumatic butterfly valve2) Ball valve: quick-installed ball valve, without resort-liquid ball valve, without ... valves, stop reversing valves, forged stainless steel valves, and pipe fittings6) Standard: AAA, DIN, SMS, IDF, RJT sanitary ...