- Utilizes the four-dimensional eccentric principle and inclined elliptical sealing mechanism: Based on the original three-dimensional eccentric principle, an additional dynamic balance angle eccentricity is added, forming four-dimensional eccentricity. The valve achieves dynamic balance under the action of reverse medium pressure, increasing the instantaneous reverse closing torque and enhancing the reverse sealing specific pressure to achieve reverse sealing.
- During the opening and closing process, sliding friction and jamming between the disc sealing ring and the valve seat sealing surface are eliminated.
- Overcomes the defects of the original floating valve seat compensating bidirectional butterfly valve, such as high manufacturing precision requirements, complex process, susceptibility to jamming, and short service life.
- Each point on the 360° circumference of the disc sealing surface can instantly and rapidly achieve point-by-point contact and point-by-point disengagement. Sealing is disengaged upon opening, and the closing contact automatically aligns quickly and accurately to complete the sealing action.
- The pressure angle on the sealing surface is greater than the friction angle, resulting in extremely low opening resistance for the disc.
- The leakage rate during forward and reverse sealing pressure tests complies with the requirements of the GB/T13927-2008 standard. Furthermore, the leakage rate can still meet standard requirements when the reverse sealing is subjected to 1.25 times the nominal pressure.
- Valve body sealing surface: Uses an integral stainless steel sealing ring with high strength, good hardness, and wear resistance.
- Soft-hard laminated metal sealing structure: The disc sealing ring employs a combination of soft-hard laminated stainless steel sheets and flexible graphite, giving it the dual advantages of metal hard sealing and elastic sealing. It provides excellent sealing performance under both low-temperature and high-temperature working conditions.
- Fire-safe structure: The all-metal structure inherently possesses fire safety characteristics.
Applications
This series of products is suitable for closed sealing devices, throttling devices, and regulating devices in pipelines where the medium flows bidirectionally. They are widely used in industries such as petroleum, chemical, power, metallurgy, mining, gas, natural gas, water conservancy, and environmental protection. They are particularly suitable for working conditions requiring strict bidirectional sealing, such as urban water supply networks, gas networks, heating networks, and pipelines requiring bidirectional medium control in the power industry.
