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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.

Manual 

DB 71F（Half lining） 

Worm wheel rotation 

DB 371F（Half lining） 

DB 71F3 （fully lined） 

DB 371F3 （fully lined） 

DB 71F4（fully lined） 

DB 371F4（fully lined） 

DB 71F46（fully lined） 

DB 371F46（fully lined） 

Pneumatic 

DB 671F（Half lining） 

Electric

DB 971F（Half lining） 

DB 671F3 （fully lined） 

DB 971F3 （fully lined） 

DB 671F4（fully lined） 

DB971F4（fully lined） 

DB 671F46（fully lined) 

DB 971F46（fully lined) 

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