What are the three eccentricities of the triple eccentric butterfly valve?
The sealing performance of the traditional hard-sealed butterfly valve is not guaranteed, and the leakage is relatively large. In order to change this situation, the hard-sealed butterfly valve has undergone many reforms, and a triple-eccentric butterfly valve was born. The characteristic of the triple eccentric butterfly valve is that the high temperature and corrosion resistant alloy material is surfacing on the sealing surface layer of the valve seat, and the multi-layer soft laminated sealing ring is fixed on the butterfly plate. More resistant to high temperature and high pressure environment, more corrosion resistant.
Specifically, the benefits of using a triple eccentric structure for hard-sealed butterfly valves are:
The unique design of the three eccentrics makes the metal hard seal more labor-saving. When the valve is opened and closed, there is no friction between the butterfly plate and the valve body during the rotation process. When the valve is closed, the torque of the transmission mechanism increases to provide a compensation. Sealing greatly improves the sealing performance of the triple eccentric butterfly valve and prolongs the service life of the butterfly valve.
What are the three eccentricities of the triple eccentric butterfly valve?
The first eccentricity is where the valve shaft is located behind the disc shaft, allowing the seal to fully wrap around the entire seat.
The second eccentricity is that the centerline of the valve shaft deviates from the centerline of the pipe and the valve to avoid interference from the opening and closing of the valve.
The third eccentricity is the offset of the seat cone axis from the centerline of the valve shaft, which eliminates friction during closing and opening and provides a uniform compression seal around the entire seat.
The above is the introduction of the triple eccentric butterfly valve. The triple eccentric butterfly valve is a kind of high-performance butterfly valve. It is currently used in many fields, and has even replaced gate valves, globe valves, ball valves and other products in some fields.