Magnetic pump use and maintenance
a Clean up debris around the equipment that affects the safety of equipment and operators.
b Before driving, the pump should be filled with the liquid to be delivered (if the pump is on suction), open the inlet valve, close the outlet valve, and connect the power supply.
cTurn on the power and check that the pump is turning correctly.
d Several sets of trial run 3-6 minutes, such as five abnormal phenomenon can be put into operation.
e When the vehicle is started for the first time after long-term shutdown or pump overhaul, remove the fan cover of the motor and crank it manually. Check if the rotation of the magnetic pump is flexible. After confirming that there are no problems, install the fan cover.
Second, the normal parking of the magnetic pump
The outlet gate valve should be closed before power is cut off.
Third, the magnetic pump emergency stop
Stop the motor immediately, then close the outlet and inlet valves.
Fourth, magnetic pump repair and maintenance
a. Check the pump and motor regularly and replace the fragile parts.
b. When the pump is not used for a long period of time, the flow path in the pump should be cleaned and the power must be turned off.
c. It is forbidden to run in air.
Five, magnetic pump operation in the matters needing attention
a. Pay attention to the differential pressure between the front and rear of the suction filter. When the pressure difference increases, it means that the foreign matter on the filter is clogged. To stop the pump operation, clean the filter.
b. The discharge amount and discharge pressure meet the specified values;
c There is no abnormal sound and vibration. If abnormal sound or vibration occurs, the general condition is that there is cavitation or excessive wear of the bearing.
E pump cavitation occurs: open the pump outlet valve, when the flow reaches a certain amount, a sudden sound and vibration, then continue to open a large valve, if the flow does not increase, indicating cavitation. Exhaust operation when cavitation occurs. Note: The magnetic pump absolutely cannot operate in the cavitation state. If it continues to operate in this state, it will cause early bearing wear.
f The current value of the motor exceeds the temperature of the rated current g Pump abnormally overheated.
h The pressure of the nitrogen regulator system should be kept within the specified range.
Sixth, faults and troubleshooting Fault Cause Solution
No liquid can be drawn 1. There is air in the suction pipe 2. Inhalation pipe leak 1. Refill the liquid or exhaust air 2. Check the suction line flow is insufficient 1. Impeller damaged 2. Insufficient rotation speed 1. Replace the impeller 2. Check the motor and Power supply line power is too large 1. The proportion of the transmission medium is too large 1. Reduce the viscosity or increase the filling pressure Insufficient head 1. There is air in the transmission medium 2. The impeller is damaged 3. The specific gravity of the medium is too large 1. Refill the liquid or air 2. Replace the impeller 3. Reduce the viscosity or increase the priming pressure Pump group vibration 1. The error between the pump axis and the motor axis is too large 2. The suction height is high and the cavitation occurs 1. Re-adjustment 2. Decreasing the installation height The shaft end leakage and seal leakage 1. Axial end snap ring clearance is too large, snap ring is loose 2. Suction height is too high and cavitation occurs 1. Adjust the snap ring screw 2. Lower mounting height
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