The structural principle of the API 609 metal seat flange triple eccentric butterfly valve：As the name suggests, the triple eccentric butterfly valve has made three eccentricities for the butterfly valve.
The structural principle of the API 609 metal seat flange triple eccentric butterfly valve：As the name suggests, the triple eccentric butterfly valve has made three eccentricities for the butterfly valve. This design process makes the triple eccentric butterfly valve have a wider application field. It not only has the good sealing performance of the soft sealing butterfly valve, but also has the high temperature and high pressure of the hard sealing butterfly valve. Characteristics. The advantages of these triple eccentric butterfly valves are due to these advantages.
The three eccentricities of the triple eccentric butterfly valves are:
The first eccentricity: the valve shaft is located behind the valve plate shaft so that the seal can completely close the entire valve seat.
The second eccentricity: the centerline of the valve shaft is offset from the pipe and valve centerline, which is immune to the opening and closing of the valve.
The third eccentricity: the seat cone axis is offset from the centerline of the valve shaft, which eliminates friction during closing and opening and achieves a uniform compression seal around the entire seat.
The triple eccentric butterfly valve cleverly places the three eccentricities on the valve plate, and adopts a partial outer spherical structure on the outer edge of the valve plate. This structure needs to be completed on a CNC machine using a simple fixture designed by itself. The outer eccentric spherical surface is polished to achieve a roughness of Ra0.4, spherical chrome plating or a stack of stellite alloy, and the hardness reaches HRC 45-60.
The eccentric angle is placed on the valve plate, and the valve seat is pressed on the valve body by the pressing ring, which solves the difficulties encountered in the processing of the ordinary three eccentric butterfly valve. The valve body, the valve plate and the valve seat are not interchangeable, and the repair is performed after the damage. A series of problems such as high cost, and modularization of all parts, simple management of the warehouse, simple processing, convenient maintenance, and reduced spare parts cost.
The triple eccentric butterfly valve is suitable for making large diameter valves, which can be widely applied to the cutting of petroleum pipelines, metallurgical steel plants, gas main pipeline adjustment and cutting, medium smelting and cutting of chemical smelting equipment, water treatment equipment inlet and outlet water regulation and cutting, cooling of thermal power stations Water systems, natural gas, lye, seawater, acid and other industries.
Specification of this API 609 metal seat flange triple eccentric butterfly valve
Parameters of this API 609 metal seat flange triple eccentric butterfly valve
Pictures of this API 609 metal seat flange triple eccentric butterfly valve