1. Swing check valves within the adoption of the rocker arm swing structure, all the opening and closing of the valve is mounted on the body, not through the body, in addition to the flange parts with sealing gasket and seal ring, the whole not funneled outside, put an end to the valve leakage.
2. Swing check valve rocker arm and disc connection adopt the structure of the spherical joint, which allows the disc to have a certain degree of freedom within 360 degrees, with appropriate trace compensation.