Since the centerline of the valve seat is formed with a β angle offset on the basis of the double-eccentric butterfly valve and the centerline of the valve body, the sealing surface of the disc plate is immediately released from the sealing surface of the valve seat during the opening and closing processes. In the moment of closing, the seat sealing surface is contacted and pressed. When completely open, gap Y is formed between the two sealing surfaces and the double-eccentric sealing butterfly valve. The design of this type of butterfly valve completely eliminates the mechanical wear and abrasion between the two sealing surfaces, so that the sealing performance and service life of the butterfly valve can be greatly improved.
The products are widely used in the petrochemical, natural gas, metallurgy, electric power, pharmaceutical, construction and other industries, and is committed to opening up the international market. The products are exported to many countries and regions such as the Middle East, Southeast Asia, Europe and the United States.
1. Specification (mm): DN50-DN3000;
2. Pressure rating (MPa): PN0.6, PN1.0, PN1.6, PN2.5, PN4.0, PN6.3;
3. Operating mode: worm, pneumatic and electric;
4. Body material: cast steel;
5. Stem material: stainless steel;
6. Packing: flexible graphite.
12 months from the date of delivery