... as follows: 1) Butterfly valve: threaded butterfly valve, quick-installed butterfly valve, welded butterfly valve, flange butterfly valve, ... butterfly valve, pneumatic butterfly valve 2) Ball valve: quick-installed ball valve, without resort-liquid ball valve, without ... valve, threaded check valve, clamp type check valve, movable check valve 4 ) Diaphragm valve: quick-installed diaphragm valve, triplet ...