... butterfly valve, weld-weld butterflyvalve, three-piece butterfly valve, pneumatic butterfly valve 2) Ball valve: butterfly-type threaded ball valve, welded-threaded ... : threaded diaphragm valve, welded diaphragm valve, clamped diaphragmvalve, u-type three way diaphragm, three-way diaphragm valve,5) Sample valves, stop reversing valves ...