... ''3)Standard:ISO,DIN,SMS,IDF,JIS,3A,etc.4)Type:welded,quiack-installed,threaded5)Working principle:remote-controlled operation by ... , threaded check valve,clamp type check valve,movable check valve4)Diaphragm valve:quick-installed diaphragm valve,triplet diaphragm valve,U-type diaphragm valve5)Sameple valves,stop ...