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1,Small size, light weight, excellent cutting performance 2. Sealing surface of the disc relative disc designed for a skewed axis of cone surface, making the disc sealing surface of valve seat sealing surface with a certain contact angle, the contact angle evenly around its circumference is equal to a thin wedge-shaped face, and the circumference of the disc vertical Seal for elliptical curve line was s sure, both played a role in sealing the compensation. 3. Disc sealing surface in the off state, even by force, pressure capacity high; butterfly plate in the opening process, the sealing surface of each point from the seat sealing surface at the same time to complete the action, not crowded card phenomenon, almost no friction, open the moment minimal. Therefore, low cost, good sealing performance and long life. 4, Sealing structure for a variety of options, life assurance and reliability. Butterfly ring | ||||||||||||||||||||||||
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