Triple eccentric butterfly valve principle diagram
Triple eccentric butterfly valve is a butterfly valve with three eccentricities, this process makes the triple eccentric butterfly valve has a wider range of applications, it not only has a soft seal butterfly valve like good sealing performance, but also has a hard seal butterfly valve high temperature and high pressure resistance characteristics. These advantages are due to the unique structure of the triple eccentric butterfly valve.
Triple eccentric butterfly valve structure principle
First eccentricity: the centre of rotation of the valve stem deviates from the centre line of the valve seat to ensure the seal between the valve seat and the valve plate.
Second eccentricity: the centre of rotation of the valve stem is eccentric from the centre line of the valve seat, and when the valve is opened, it is the sealing surface of the butterfly plate that quickly breaks away from the sealing surface of the valve seat.
Third eccentric: the centre of the sealing surface vertebrae is eccentric from the centre line of the valve, eliminating the interference and friction between the sealing surface of the butterfly plate and the sealing surface of the valve seat when the valve is opened or closed.
The main features of triple eccentric butterfly valve
- Both flow directions can bear pressure, to achieve the installation method without flow direction restriction.
- All-metal seal design, valve seat and seal ring adopt stearic alloy overlay welding technology, solving the problem of poor sealing performance of butterfly valve under severe working conditions such as high temperature and high pressure, low temperature, etc.; it can withstand pressure up to 2500 pounds, temperature as low as -196 ℃ up to 850 ℃, sealing to achieve 0 leakage, regulation ratio up to 100:1 above.
- The valve seat and body are of split design, the valve plate and seal ring are of split design, and the products can be interchangeable. The valve will not be scrapped because of the seal wear problem, only the valve seat and seal ring need to be replaced for normal use, thus reducing the cost of use.
Triple eccentric butterfly valve is suitable for making large-diameter valves, which can be widely used in industries such as petroleum pipeline cutting off, metallurgical steel plant, gas main pipeline regulation and cutting off, chemical smelting device medium regulation and cutting off, water treatment equipment inlet and outlet water regulation and cutting off, cooling water system of thermal power station, natural gas, alkaline liquid, sea water, acid liquid, etc.
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