... follows: 1) Butterfly valve: threaded butterfly valve, quick-installed butterfly valve, welded butterfly valve, flange butterfly valve, threaded ... valve, pneumatic butterfly valve 2) Ball valve: quick-installed ball valve, without resort-liquid ball valve, without dead ... valve, movable check valve 4 ) Diaphragm valve: quick-installed diaphragm valve, triplet diaphragm valve, U-type diaphragm valve5) ...