Product introduction FLOWSPEC 900X type emergency shut off valve is applicable to water supply system which fire fighting and domestic water are in parallel to distribute the water supply direction. In case of a fire, the fire fighting will need large water suddenly, 900X type emergency shut off valve will shut off domestic water to make sure there is enough water for fire fighting. When fire fighting doesn’t need water, the pressure will reduce, and the valve will open automatically to reinstate domestic water supply. 900X type emergency shut off valve makes it no need to install separate fire fighting special pipe, which saves greatly the construction cost and water consumption. 900X type emergency shut off valve is high sensitive performance, safe and reliable, convenient adjust and long service life.