... valve 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,withou ... clamp type check valve,movable check valve4)Diaphragm valve:quick-installed diaphragm valve,triplet diaphragm valve,U-type diaphragm ...