... million users, 2,30 technology patents 2,BV&CE Cheap!! Gas detector alarm system with shut off valve 1. FeaturesLightweight, low-cost valve for ... home use.Designed as gas pipe breakers for emergency use.Applicable in natural gas, liquid gas, manufactured gas.Ideal for low power ... voltage of the associated supporting products with valves(such as alarm) match, so as not to damage the solenoid valve ...