Features of Soft Seal Butterfly Valve
The high-performance soft-sealing butterfly valve is characterized in that: the soft-sealing butterfly valve seat sealing ring is composed of multi-layer stainless steel sheets on both sides of the soft T-shaped sealing ring.
The sealing surfaces of the soft-sealing butterfly valve plate and the soft-sealing butterfly valve seat are oblique conical structures, and the temperature-resistant and corrosion-resistant alloy materials are surfacing on the oblique conical surface of the soft-sealing butterfly valve plate; the spring fixed between the pressure plates of the adjustment ring is assembled with the adjustment bolts on the pressure plate structure together. 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.
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 conditions. The test proves that when the pool 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 soft-sealed butterfly valve plate. When the positive medium pressure increases, the tighter the extrusion between the oblique conical surface of the soft-sealing butterfly valve plate and the sealing surface of the soft-sealing butterfly valve seat, the better the sealing effect.
When in the reverse flow state, the sealing between the soft-sealing butterfly valve plate and the soft-sealing butterfly valve seat depends on the torque of the driving device to make the soft-sealing butterfly valve plate press against the soft-sealing butterfly valve seat. With the increase of the reverse medium pressure, when the unit positive pressure between the soft-sealed butterfly valve plate and the soft-sealed butterfly valve seat is less than the medium pressure, the deformation stored in the spring of the adjusting ring after loading can compensate the soft-sealed butterfly valve plate and the soft-sealed butterfly valve seat. The tight pressure on the sealing surface of the sealing butterfly valve seat plays an automatic compensation role.
Therefore, the utility model is not installed on the soft-sealed butterfly valve plate with soft and hard multi-layer sealing rings like the existing technology, but is directly installed on the valve body, and it is very ideal to add an adjustment ring between the pressure plate and the soft-sealed butterfly valve seat Two-way hard sealing method. It will replace gate valves and spherical valves.