Nominal coherent way(mm):DN20-450
Pressure grade:PN10,PN16,PN25
Diaphragm type:DN20-450
Piston:DN350-750
Function and use:Can regulation and control open and close the non-return valve of pace,when the water pump starts or stops running,can cooperate and regulate it to opening bestly live or and close the pace.Can be used in the skyscraper,reduce water hammer phenomenon,in order to reach the safe and quiet result of opening and closing.