Three-eccentric metal hard seal butterfly valve

The valve uses a three-eccentric structure, which means that an angular eccentricity is added to a conventional metal hard-seal double-eccentric butterfly valve. This eccentricity ensures that any point between the sealing ring and the seat ring is quickly released or brought into contact during valve opening or closing, thereby achieving true "non-friction" performance between the sealing pairs and greatly extending the service life of the valve.

The hard-seal metal-seated butterfly valve employs a "radially dynamically balanced sealing system," incorporating nationally patented technology. Through optimized design, the forces acting on both sides of the butterfly disc (inlet and outlet) are approximately balanced. This significantly reduces the valve's opening torque (approximately two-thirds that of a conventional butterfly valve), while also providing reliable bidirectional sealing performance at both the inlet and outlet.

The sealing ring of the butterfly disc is manufactured by laminating materials such as stainless steel sheets, graphite, carbon fiber, and PTFE.