The high-performance three-eccentric bidirectional hard sealing butterfly valve is characterized in that: the valve seat sealing ring is composed of a plurality of layers of stainless steel sheets on both sides of a soft T-shaped sealing ring. The sealing surface of the valve plate and the valve seat is an oblique conical structure, and the temperature-resistant and corrosion-resistant alloy material is deposited on the inclined conical surface of the valve plate; the spring fixed between the adjusting ring pressing plates and the adjusting bolt assembly on the pressure plate are assembled.
The structure effectively compensates the tolerance band between the sleeve and the valve body and the elastic deformation of the valve stem under the medium pressure, and solves the sealing problem of the valve in the two-way interchangeable medium conveying process. The soft T-shaped multi-layer stainless steel sheet is used to form the sealing ring, which has the double advantages of metal hard seal and soft seal. It has zero leakage sealing performance under low temperature and high temperature conditions.
When the test proves that the positive flow state of the tank (the direction of flow of the medium is the same as the direction of rotation of the disc), the pressure of the sealing surface is caused by the action of the torque of the transmission and the pressure of the medium on the valve plate. When the positive medium pressure increases, the tighter surface of the valve plate and the sealing surface of the valve seat are pressed tighter, and the sealing effect is better. In the countercurrent state, the seal between the valve plate and the valve seat is biased against the drive to bias the valve plate against the valve seat. As the pressure of the reverse medium increases, the unit positive pressure between the valve plate and the valve seat is less than the medium pressure, and the deformation of the spring of the adjusting ring stored after the load can compensate the tight pressure of the sealing surface of the valve plate and the valve seat. Plays an automatic compensation function. Therefore, the utility model does not install a soft and hard multi-layer sealing ring on the valve plate as in the prior art, but is directly mounted on the valve body, and an adjustment ring is added between the pressure plate and the valve seat, which is an ideal two-way hard sealing method. . It will replace gate valves, globe valves and ball valves. Recommended: high performance butterfly valve, high performance ball valve, hard sealing butterfly valve http://
The structure effectively compensates the tolerance band between the sleeve and the valve body and the elastic deformation of the valve stem under the medium pressure, and solves the sealing problem of the valve in the two-way interchangeable medium conveying process. The soft T-shaped multi-layer stainless steel sheet is used to form the sealing ring, which has the double advantages of metal hard seal and soft seal. It has zero leakage sealing performance under low temperature and high temperature conditions.
When the test proves that the positive flow state of the tank (the direction of flow of the medium is the same as the direction of rotation of the disc), the pressure of the sealing surface is caused by the action of the torque of the transmission and the pressure of the medium on the valve plate. When the positive medium pressure increases, the tighter surface of the valve plate and the sealing surface of the valve seat are pressed tighter, and the sealing effect is better. In the countercurrent state, the seal between the valve plate and the valve seat is biased against the drive to bias the valve plate against the valve seat. As the pressure of the reverse medium increases, the unit positive pressure between the valve plate and the valve seat is less than the medium pressure, and the deformation of the spring of the adjusting ring stored after the load can compensate the tight pressure of the sealing surface of the valve plate and the valve seat. Plays an automatic compensation function. Therefore, the utility model does not install a soft and hard multi-layer sealing ring on the valve plate as in the prior art, but is directly mounted on the valve body, and an adjustment ring is added between the pressure plate and the valve seat, which is an ideal two-way hard sealing method. . It will replace gate valves, globe valves and ball valves. Recommended: high performance butterfly valve, high performance ball valve, hard sealing butterfly valve http://
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