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Three eccentric metal seal butterfly valve advantages
- Feb 03, 2018 -

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 disc 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, globe valves and ball valves.