| 摘要 |
<p>A butterfly valve lock device (10) arranged to be fitted to an end portion of a shaft (5) of a butterfly valve (1), the lock device comprising a keyway (13) and a flange (12), the keyway arranged to connect with the end portion of the shaft, the flange arranged to be used to connect to a housing of the valve, wherein the flange is not provided with drilled through-holes for securing the device to the housing.</p> |
