Strong German valve H76H Wafer Check Valve product characteristics 
 H76 check valve innovative dual-valve structure with two spring-loaded valve (valve), hanging in the center vertical hinge pin. When the fluid begins to flow when the valve flap in acting on the sealing surface of the center joint force (F) under the action open. Point plays the role of the reaction of the spring support force (Fs) in the valve surface center position, the roots of the valve to open first. In order to effectively avoid the phenomenon of the old conventional valve sealing surface friction in the valve is open. 
 When to slow down, the torsion spring auto counterproductive, making the valve to close, near to the valve body seat, reducing the travel distance and time closed. When fluid backflow, the valve gradually near the seat of the valve body, valve dynamic response will be greatly accelerated. This dramatically reduces the impact of water hammer phenomena, which crash-free performance. 
 When it is closed, the spring force point the top of the flap valve closed first. This prevents the emergence of bite grinding of the valve roots phenomenon, so that the valve can be maintained longer seal integrity.