Pump to do before the start of preparations are: First, check the water pump equipment intact, no one at work. Second, the bearings filled with oil, oil level is normal, qualified oil. Third, the inlet valve open, check the seal gushing situation, a little drip better. Fourth, the pump water, the pump housing to open the exhaust valve, the air row after the close. Fifth, for the negative pressure of the inlet pump, the inlet valve is fully open, will not seal along the gushing water; pump water, it can not release air from the exhaust valve to the atmosphere, and the need to start the vacuum pump out of the air. Six, for high temperature pumps, such as water pumps, but also before the start of warm pump. After warm pump must also start the auxiliary pump and open the recirculation pipe on the manual valve. Pump rated to reach the rated, check the pressure, current, and pay attention to whether there is vibration and noise. After everything is normal, open the exit door and supply water to the outside. Start time spins should not be too long to 2 to 3 minutes, otherwise the water temperature, resulting in vaporization and equipment damage.