Our technology department continuously push-out butterfly valves innovative technology, in order to improve the market competitiveness. Mechanical engineer Song propose a technology improvement about D341-(700-800) valve shaft installation. In the original process, workers need lift the valve body using crown block, impact the valve shaft into the valve body. It is time-consuming and very dangerous. The head of butterfly valve shaft develop sharp edges, workers need polish again. Now we press the valve shaft into butterfly valve body using hydraulic station, which is skillful and no burrs without polished.