... Working temperature:0-80 4.DN:50-700mm emergency shut off valveUES:the valve for the fire and life ... After staring the pump valve to close,cutting off water to ensure water from fire service installationsFeature: ... Closed,then the main valve to close,cutting off water to ensure water from the service installations, ... :GB/T13927Typical installation diagramMain dimensions: 900X emergency shut off valve