The valve body is better than the national standard QT450-10 material for precision casting, tensile strength 450Mpa, elongation greater than 10%, not easy to crack, freezing crack, spheroidization rate of more than 3, fully in line with QT450 mechanical properties;

Inside and outside the valve body using powder epoxy resin electrostatic coating, spraying thickness of 250μm, effectively prevent the valve body and the medium contact caused by corrosion and rust, beautiful appearance;

The rubber flap is made of steel plate, steel rod and reinforced nylon cloth as substrate, and the outer layer is covered with rubber. The full-flow area design makes it difficult to accumulate debris;

Each valve factory is in accordance with national standards to do shell, seal double-layer pressure detection;

From the blank to the finished product packaging factory each link layer quality inspection.