• Designed by using the four-offset principle and the oblique elliptical sealing principle, achieving dynamic balance under the action of reverse medium pressure to achieve reverse sealing.

• During the opening and closing process, no sliding friction or jamming between the butterfly sealing ring and the valve seat sealing surface.

• Eliminating the defects of complex manufacturing process, easy jamming.

• The sealing surface of the butterfly disc can quickly complete point by point contact and point by point detachment along the 360° circumference in an instant.

• Adopt integral stainless steel sealing ring with high strength, good hardness, and wear resistance for valve body sealing surface.

• Adopt a soft hard laminated metal sealing structure design, achieving excellent sealing performance under both low and high temperature conditions.

• All use metal material, itself has the characteristic of fireproof safety.

Suitable for closed circuit sealing devices, throttling devices, and regulating devices containing bidirectional flow of media in pipelines. Widely used in industries such as petroleum, chemical, power, metallurgy, mining, coal gas, natural gas, hydropower, environmental protection. Especially suitable for those pipelines under the working conditions with strict requirements for bidirectional sealing, like urban water supply pipelines, gas pipelines, thermal pipelines and power pipelines.