Apart from the butterfly valve in the pipeline and the closure by cutting, in recent years has been the sealing performance as the main evaluation index, favored by the market. In addition, the butterfly still has the advantages of small size, light weight and simple structure advantages, compared with the same parameters valve, the average weight of 30-50%, the butterfly plate rotating 90 degrees can be realized the opening and closing process, because the media is approximately equal to the force, shaft on both sides of the disc by the torque on the contrary, the smaller opening and closing torque.
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Manual
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DB 71F（Half lining）
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Worm wheel rotation
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DB 371F（Half lining）
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DB 71F3 （fully lined）
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DB 371F3 （fully lined）
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DB 71F4（fully lined）
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DB 371F4（fully lined）
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DB 71F46（fully lined）
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DB 371F46（fully lined）
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Pneumatic
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DB 671F（Half lining）
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Electric
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DB 971F（Half lining）
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DB 671F3 （fully lined）
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DB 971F3 （fully lined）
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DB 671F4（fully lined）
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DB971F4（fully lined）
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DB 671F46（fully lined)
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DB 971F46（fully lined)
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1 center line butterfly valve for the entire butterfly plate and the valve seat in the 360 degree circle concentric (center line), with two-way sealing function, pressure, flow can be freely adjusted;
2 eccentric butterfly valve to generate two-dimensional direction of the eccentric cam effect will make the sealing enough than the pressure seal, and with the increase of working pressure produced by the sealing seal more than enough pressure, and with the increase of the working pressure, the sealing effect is more ideal.
Four 3 loaded elastic seal, the absolute guarantee of the valve inside, outside the zero leakage;
Reasonable special transition curve and the valve seat connection A. shaft, disc circumference;
B. by O elastic ring end surface of the shaft head and shoulder rigid washer, elastic rubber pad combination;
The radial of the C. shaft adopts the combination of the O type ring and the metal pad;
The D. valve seat is inserted in the body groove of the elastic strip;
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