... 2,30 technology patents 2,BV&CE Cheap!! Gas detector alarm system with shut off valve 1. FeaturesLightweight, low ... emergency use.Applicable in natural gas, liquid gas, manufactured gas.Ideal for low power and pressure.2. Parameter Closing ... strong VibrationAutomatically close under strong vibrationApplicable MediaNatural Gas, GLP and non-corrosive gasesSealing materialNBR rubberValve body Brass ...