Wafer-type soft butterfly valve seal installed in the pipe diameter direction. In the butterfly valve body cylindrical channel, the disc-shaped disc rotates about the axis, the rotation angle is between 0 ° ~ 90 °, rotated to 90 °, the valve is fully open state. Pneumatic butterfly valve on the folder soft seal butterfly valve characteristics of the new high-life stainless steel butterfly valve and the use of the existing problems At present, the soft-sealed butterfly valve as a system used to achieve on-off and flow control components, has been in the petroleum, chemical, Metallurgy, hydropower and many other fields have been very widely used. In the well-known butterfly valve technology, the sealing structure adopts the sealing structure, the sealing material is rubber, polytetrafluoroethylene and the like. Due to the structural characteristics of the restrictions, do not meet the high temperature, high pressure and corrosion-resistant, anti-wear and other industries. A more advanced butterfly valve is a three eccentric metal seal butterfly valve, the valve body and the valve seat as a single component, seat sealing surface layer surfacing temperature, corrosion resistant alloy material. Multi-layer soft stacked ring fixed to the valve plate, this butterfly valve compared with the traditional butterfly valve with high temperature, light operation, opening and closing without friction, closed with the torque of the transmission mechanism to compensate for increased sealing, improved butterfly valve The sealing performance and extend the service life of the advantages. A, Wafer-type soft sealing butterfly valve in the course of the following problems still exist: First, the multi-layer hard and soft stacked ring is fixed on the valve plate, when the valve plate normally open state, the sealing surface of the positive Scour, sheet metal sandwich in the soft seal by the erosion, a direct impact on sealing performance. Second, by the structural conditions of the structure does not adapt to do the following DN200 valve, because the overall structure of the valve plate is too thick, large flow resistance. Third, due to the principle of three eccentric structure, the seal between the sealing surface of the valve plate and the valve seat is pressed against the valve seat by the torque of the transmission device. The positive flow state, the higher the media pressure seal squeeze tight. When the flow medium countercurrent media pressure increases with the pressure between the valve plate and valve seat unit pressure is less than the medium pressure, the seal began to leak. High-performance soft sealing butterfly valve, characterized in that: the valve seat sealing ring is composed of a plurality 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 a temperature-resistant and corrosion-resistant alloy material is deposited on the oblique conical surface of the valve plate; the spring fixed between the adjusting ring plate and the adjusting bolt on the pressure plate is arranged together. This structure effectively compensates for 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 existing in the process of transporting the valve in the bidirectional interchangeable medium. The soft T-shaped multi-layer stainless steel sheet on both sides of the seal ring, with the advantages of both metal seal and soft seal, both in low temperature and high temperature conditions, have zero leakage of sealing performance. Experiments show that pool positive flow state (medium flow direction and disk rotation in the same direction), the sealing surface pressure is the torque of the actuator and the medium pressure on the role of the valve plate. Positive media pressure increases when the valve plate oblique cone surface and seat sealing surface squeeze the more tight, the better the sealing effect. In counter-current conditions, the seal between the valve plate and the valve seat presses the valve plate against the valve seat due to the moment of the drive. As the pressure of the reverse medium increases, the positive pressure between the valve plate and the valve seat is less than the pressure of the medium. The deformation stored by the spring of the adjusting ring after the load is absorbed can compensate for the tight pressure on the sealing surface of the valve plate and the valve seat Play a role in automatic compensation. Therefore, unlike the prior art, the utility model has the advantages that the soft and hard multi-layer sealing ring is mounted on the valve plate and is directly mounted on the valve body, and an adjusting ring is provided between the pressing plate and the valve seat which is a perfect bidirectional hard sealing method . It will replace Gate Valves and Ball Valves. B, the folder type soft sealing butterfly valve performance classification 1, according to the structure classification (1) the center seal butterfly valve (2) single eccentric seal coal valve (3) double eccentric sealing butterfly valve (4) three eccentric seal valve Seal surface material classification (1) soft seal butterfly valve. 1) The sealing pair is made of non-metallic soft material to non-metallic soft material. 2) The sealing pair is made of metal hard material to non-metal soft material. (2) metal seal butterfly valve. The sealing pair is made of metal hard material to metal hard material. 3, classified by the seal (1) mandatory seal butterfly valve 1) flexible sealing butterfly valve. Sealing pressure ratio by the valve is closed when the valve plate squeeze valve seat, valve seat or valve plate flexibility 2) plus torque butterfly valve. Sealing than the pressure applied by the valve shaft torque (2) pressure sealing butterfly valve. Sealing than the pressure from the valve seat or valve plate elastic seal components generated pressure (3) automatic sealing butterfly valve. Sealing pressure is automatically generated by the media pressure. 4, classified by work pressure (1) vacuum butterfly valve. Work pressure is lower than the standard reactor atmosphere calendar butterfly valve. (2) low pressure butterfly valve. Nominal pressure PN (3) Medium pressure butterfly valve. Nominal pressure PN 2.5 - 6.4MPa butterfly valve. (4) high-pressure butterfly valve. Nominal pressure PN 10.0 - 80.0MPa butterfly valve. (5) Ultra-high pressure butterfly valve. Nominal pressure PN> 100MPa butterfly valve. 5, according to the working temperature classification (1) [Buy] Pump Accessories [Procurement] Ball Valve [Procurement] Submersible Pump [Procurement] U-shaped humidifying pipe [Procurement] Pump [Purchase] Safety valve combination [Procurement] [Procurement] pumps
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