The 1monomer structure, light weight, good rigidity, convenient maintenance;

2spring thrust so that the valve flap is without the use of medium pressure, can also handle closed position;

3 good ways of supporting the valve at whatever installation location of the valve flap and the valve seat can be good for, so the valve can be installed at any angle.

4valve sleeve shapes streamlined design and cavity of streamlined design combination of axial flow type check valve in a streamline flow passage, the accurate calculation and design of the flow channel and flow area fully consistent, small pressure loss, stable flow, no cavitation. The valve in the medium flows to generate negative pressure and spring force back seat, no medium on the valve clack back direct impact; therefore, the axial flow type check valve is a low noise valve.

5 disc at the front and back ends of the valve flap shaft bearing and special surface treatment and structure design, overcome similar valves use occurs frequently during blocking phenomenon, opening and closing smooth; avoiding gravity factor causing the valve flap for neutral difference, sealing the uneven stress, two times between sealing side anastomoses. Disparate impact sealing property defects, so that the seal is always in a good state of stress and anastomosis.

6 precise design using spring force on the valve flap is in the closed position is slightly larger than the valve flap valve and the gravity and the friction force between the front and the back support and the valve flap can, at low pressure and any installation of back seat sealing, but also can realize low voltage open, reducing the pump starting load, protect the pump running safety.