Hydraulic triple eccentric lug type wafer butterfly valve

Hydraulic triple eccentric lug type wafer butterfly valve

The origin of the design of the triple eccentric butterfly valve: the butterfly valve must be resistant to high temperature, must use a hard seal, but the leakage is large; to zero leakage, it must use a soft seal, but not high temperature.

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The origin of the design of the triple eccentric butterfly valve: the butterfly valve must be resistant to high temperature, must use a hard seal, but the leakage is large; to zero leakage, it must use a soft seal, but not high temperature. In order to overcome the contradiction of the double eccentric butterfly valve, the butterfly valve was subjected to the third eccentricity. The structural feature is that the conical axis of the sealing surface of the disc is deflected to the axis of the body cylinder, that is, after the third eccentricity, the sealing section of the butterfly plate is not eccentric at the axial position of the double eccentric valve stem. In addition, it is a true circle, but an ellipse, and its sealing surface shape is also asymmetrical, and the one side is inclined to the center line of the body, and the other side is parallel to the center line of the body. The biggest feature of this third eccentricity is that it fundamentally changes the sealing structure, no longer a positional seal, but a torsion seal, that is, it does not rely on the elastic deformation of the valve seat, but completely relies on the contact surface pressure of the valve seat to achieve the seal. The effect solves the problem of zero leakage of the metal valve seat in one fell swoop, and the contact surface pressure is proportional to the medium pressure, and the high pressure and high temperature are also solved.

Specification of this Hydraulic triple eccentric lug type wafer butterfly valve

Parameters of this Hydraulic triple eccentric lug type wafer butterfly valve

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