... as follows:1)Butterfly valve: threaded butterfly valve,quick-installed butterfly valve,welded butterfly valve,flanged butterfly valve ... welded butterfly valve,pneumatic butterfly valve.2)Ball valve:quick-installed ball valve,without resort-liquid ball valve, ... check valve, threaded check valve,clamp type check valve,movable check valve4)Diaphragm valve:quick-installed diaphragm valve,triplet diaphragm ...