When fixing a butterfly valve, the flange plate fixing method is superior to the hydraulic clamp method.

When fixing a butterfly valve, the flange plate fixing method is superior to the hydraulic clamp method.

    We conducted a simulation experiment to compare the impact of two different clamping methods on the sealing performance of the butterfly valve. 

    The first method is the hydraulic clamp fixation, where four hydraulic clamps apply pressure evenly to the backside of the flange at the far end of the valve seat. 

    The second method is the flange plate fixation, where an additional flange plate is placed on the upper flange, and hydraulic claws clamp the flange plate to fix the butterfly valve.

The goal of the study is to analyze whether the different clamping methods affect the deformation and sealing performance of the butterfly valve.

    In the simulation experiment, we used SolidWorks 2020 software for modeling, with simulation conditions consistent with the actual DN300 PN16 butterfly valve product. The experimental results showed that the first method, using hydraulic clamps, caused uneven deformation of the valve body, particularly at the positions of the four hydraulic claws. The deformation at the valve seat area reached 5.625e-02mm. This uneven deformation could result in leakage or poor sealing at certain positions, which manifests as seepage in water and bubbling in gas media.

    In contrast, the second method, using the flange plate clamping, showed more uniform force distribution and smaller deformation, with the deformation at the valve seat area measuring 6.121e-03mm. The deformation was more evenly distributed, resulting in minimal impact on the sealing performance. This clamping method more closely simulates the actual working conditions of the butterfly valve, where the valve is subjected to uniform pressure applied by bolts distributed across the two ends of the flange.

    Therefore, the flange plate clamping method used by our company not only ensures that the butterfly valve's sealing performance is unaffected by the clamping force but also better replicates the actual working conditions. Compared to the hydraulic clamp method, the flange plate clamping method is more conducive to the reliability and stability of the butterfly valve's sealing performance.

    We LYV valve specialized in butterfly valve designing and manufacturing, if you have any questions, please contract me freely anytime~

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