Screw Gate Double Way 1.Simple structure 2.Flexible manipulation 3.Light weight ... valves,safety valves,slurr valves ,diaphragm valves ,check valves,and gate valves. The nominal diameter is DN40--DN 4000mm with the ... ,various metal and non-metal compensators and mufflers Structural featuresThe gate structure is simple, flexible operation, light weight, no jamming, especially ...