Norval Non-Return Check Valve Method of Operation

Flow takes place in the direction of the arrows under forward and reverse flow.

A - Check Valve Open

B - Check Valve Closed

C - Check Valve Diaphragm

D - Check Valve Cone

With flow in the forward direction the diaphragm deflects inwards (A) allowing easy passage of the liquid with little pressure loss. When a no flow, or back pressure, condition occurs the diaphragm returns to its relaxed position (B) sealing off all flow in the reverse direction.

This action is unaffected by the orientation of the Norval Non Return Check Valve.

Stop Silent is a registered trademark of Northvale Korting.