... 5.Normal Close Valve It is small in size, large flow, beautiful appearance, superior performance, change tropism is good and has ... MediumAir,Water,Oil,GasMotion PatternDirect Drive TypeTypeNormal Close TypeAperture of Flow Rate16CV Value4.8Joint Pipe BoreG1/2"Operation Fluid Viscosity20CST BelowWorking ... / water, air,oil, gas/12V,24V DC or 110V,220V AC