The sealing performance of the traditional hard seal butterfly valve is not guaranteed, and the leakage is large. In order to change this situation, the hard seal butterfly valve has been reformed for many times, and a three eccentric butterfly valve has been born. The triple eccentric butterfly valve is characterized by surfacing high-temperature and corrosion-resistant alloy materials on the sealing surface layer of the valve seat and fixing multi-layer soft laminated sealing rings on the butterfly plate. This process makes the three eccentric butterfly valve more resistant to high temperature and high pressure environment and corrosion than the traditional butterfly valve products.
Specifically, the advantages of the triple eccentric structure of the hard seal butterfly valve are:
The unique design of triple eccentric 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. When the valve is closed, the torque of the transmission mechanism increases to provide a compensation seal, which 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 that the valve shaft is located behind the valve plate shaft, so that the seal can completely close around the entire seat.
The second eccentricity is that the center line of the valve shaft deviates from the center line of the pipeline and the valve, so as to avoid interference from the opening and closing of the valve.
The third eccentricity is that the cone axis of the valve seat deviates from the center line of the valve shaft, which can eliminate friction during closing and opening, and achieve uniform compression sealing around the whole valve 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, which is currently applied in many fields, and even has replaced gate valve, globe valve, ball valve and other products in some fields.
