Nominal coherent way(mm) :DN20-450
Pressure grade:PN10,PN16,PN25
Diaphragm type:ND50-400
Piston:DN350-750
Function and use:This valve is for the use by the fire demand water and parallel water-supply system of domestic water of biotope.At fire demand water,valve automatic emergency cut-off,cut off domestic water guarantee the fire demand water.When fire control finishes, valve open auto matically,resume domestic water water supply can save cost alone than traditional fire control.