1. The valve seat sealing ring is composed of multi-layer stainless steel sheets on both sides of the soft T-shaped sealing ring.
2. The sealing surface of the valve plate and the valve seat is an oblique conical structure, and the temperature-resistant and corrosion-resistant alloy materials are surfacing on the oblique conical surface of the valve plate; the spring fixed between the pressure plates of the adjustment ring is assembled with the adjustment bolts on the pressure plate. This structure effectively compensates the tolerance zone between the shaft sleeve and the valve body and the elastic deformation of the valve stem under medium pressure, and solves the sealing problem of the valve in the process of two-way interchangeable medium delivery.
3. The sealing ring is composed of multi-layer stainless steel sheets on both sides of the soft T shape, which has the dual advantages of metal hard sealing and soft sealing, and has zero leakage sealing performance no matter in low temperature or high temperature. The test proves that when the tank is in a positive flow state (the medium flow direction is the same as the butterfly plate rotation direction), the pressure on the sealing surface is generated by the torque of the transmission device and the medium pressure on the valve plate. When the positive medium pressure increases, the tighter the extrusion between the inclined conical surface of the valve plate and the sealing surface of the valve seat, the better the sealing effect.
4. In the state of reverse flow, the sealing between the valve plate and the valve seat depends on the torque of the driving device to make the valve plate press against the valve seat. With the increase of the reverse medium pressure, when the unit positive pressure between the valve plate and the valve seat is less than the medium pressure, the deformation stored in the spring of the adjusting ring after being loaded can compensate the tight pressure on the sealing surface of the valve plate and the valve seat play an automatic compensation role.
Therefore, the utility model does not install soft and hard multi-layer seal rings on the valve plate like the existing technology, but directly installs on the valve body, adding an adjusting ring between the pressure plate and the valve seat is a very ideal two-way hard sealing method .