Nominal coherent way(mm):DN20-450
Pressure grade:PN10.PN16,PN25
Diaphragm type:DN20-450
Piston:DN350-750
Function and use:Main valve install in mix water pipeline need,control pipeline of flow,keep,book.The flow does not change,limit the too big flow in a piece of reservation valve,it is low-voltage to reduce the top to the low reaches under high pressure,Even the pressure of the upper reaches of the main valve changes,will not influence the flow of the low reaches of main valve either.