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Before trial operation should be the first to use the hand wheel drive coupling, check whether the rotation is flexible, to the division is correct. Open the source of the supply of the inlet valve, if there is no liquid height, the pump must be filled with liquid. Connecting shaft cooling water. Start the motor to pump operation, and open the outlet valve in time. When the stop, first off the export valve, and then cut off the power supply, stop the supply of cooling water seal.