D342X-10C/16C double eccentric soft sealing flange butterfly valve is a new special design improved on the basis of the single eccentric butterfly valve. Its structural feature is that the shaft center of the valve stem deviates from the center of the disc plate and the center of the valve body. The effect of the double eccentricity enables the disc plate to leave the valve seat quickly when the valve is opening, which greatly eliminates unnecessary excessive extrusion and scratching between the disc plate and the valve seat, reduces the opening resistance and wear, improves the valve seat service life. With the scraping greatly reduced, the double eccentric butterfly valve can also use the metal valve seat, which improves the application of butterfly valve in the high temperature field. Double eccentric soft sealing butterfly valve is mainly used for water supply and drainage in water plants, power plants, steel smelting, paper making, chemical industry, food industry and other industrial systems, especially for tap water pipelines, as a adjusting and shutting off equipment.
Technical parameters for D342X-10C/16C double eccentric soft sealing butterfly valve:
Common used model No: D342X-10C/Q, D342X-16C/Q.
Nominal diameter: DN80mm-DN2000mm
Nominal pressure: 1.0-2.5Mpa
Applicable mediums: water, oils, air.
Applicable working temperature: -29℃ – 200℃.
Body material: Ductile iron, carbon steel( WCB),
Design standard: GB/T122238
Face to face standard: GB/T12221
Flange standard: GB/T 9113
Advantages of double eccentric butterfly valve:
1. due to the double eccentric structure of the double eccentric soft sealing butterfly valve, the disc plate gradually separates from the valve body during the opening process of the valve, which reduces the friction between the sealing surfaces and prolongs the service life of the valve sealing material. The double eccentric resilient valve seat sealing system can achieve bidirectional sealing performance and zero leaking effect. Double eccentric soft sealing butterfly valve has excellent gas-liquid isolation function and reliable flow regulating characteristics. The resilient sealing ring in the double eccentric soft sealing butterfly valve can be replaced easily and adjust its sealing performance.
2. The valve seat structure design of double eccentric soft sealing butterfly valve: cast steel valve body, valve seat adopts body material+butt welded corrosion resistant material on surface; cast steel valve body, valve seat adopts movable valve seat. The eccentric soft sealing butterfly valve can be opened and closed quickly, and be operated flexibly and is labor-saving; the compression degree of the sealing ring can be adjusted, so that the sealing compression can be controlled in a better state, which make the service life of the sealing valve seat longer.
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