1. Inspection before operation

1) Check that the rotation direction of the motor is consistent with the rotation direction specified by the pump. The pump rotates clockwise when viewed from the drive end. When testing the rotation direction of the motor, the motor should be tested separately and must not be connected to the pump.

2) Check whether the elastic pad in the coupling is complete and correct.

3) Check whether the rotation of the motor shaft and the pump is concentric.

4) There should be no tightness or friction when turning the pump (including the motor) by hand.

5) Check whether the bearing box is filled with bearing oil (L-FC46 or L-FC68) to the oil mark indication position.

6) Before starting the pump, open the shaft seal water (cooling water for mechanical seal), open the pump inlet valve, and close the pump outlet valve.

7) Check whether the valve is flexible and reliable.

8) Others, such as anchor bolts, flange gaskets and bolts. Whether the pipeline system is installed correctly, firmly and reliably.

2. Start-up and monitoring

1) Before starting the slurry pump, the pump inlet valve should be opened and the pump outlet valve should be closed. Then start the pump. After the pump starts, slowly open the pump outlet valve. The size and speed of the pump outlet valve should be controlled by the pump not vibrating and the motor not exceeding the rated current.

2) The start of the series pump also follows the above method. After opening the first pump, the outlet valve of the last pump can be opened a little (the size of the opening should be 1/4 of the rated current of the first pump motor), and then the second and third pumps can be started successively until the last pump. After all the series pumps are started, the outlet valve of the last pump can be gradually opened. The size and speed of the valve opening should be controlled by the pump not vibrating and the motor of any pump not exceeding the rated current.

3) The slurry pump is mainly intended to convey flow, so it is best to install a flow meter (meter) in the operation monitoring system to monitor whether the flow meets the demand at any time; in the pipeline system equipped with a cyclone, the slag flushing system, and the filter press dehydration system, a certain pressure is also required at the pipeline outlet. Therefore, a pressure gauge should also be installed in this system to monitor whether the pressure meets the demand.

4) In addition to monitoring the flow and pressure during operation, the pump should also monitor the motor so that it does not exceed the rated current of the motor. Monitor the oil seals, bearings, etc. at any time to see if there are abnormal phenomena, whether the pump has pumping or overflowing, etc., and deal with them at any time.

3. Routine maintenance of the pump

1) The suction pipeline system of the pump is not allowed to have air leakage, and the pump inlet sump grille should meet the particle requirements that the pump can pass, so as to prevent large particle materials or long fiber materials from entering the pump to cause blockage.

2) Replace easily damaged parts in time, the maintenance and installation should be accurate, the gap adjustment should be reasonable, and there should be no tight friction.

3) The water pressure and water volume of the bearing should meet the regulations. Adjust (or replace) the tightness of the packing at any time to avoid leakage of the shaft seal. Replace the sleeve in time.

4) When replacing the bearing, make sure that there is no dust in the bearing assembly and the lubricating oil is clean. The bearing temperature during the operation of the pump should generally not exceed 60-650C, and the maximum should not exceed 750C.

5) Ensure the coaxiality of the motor and the pump, and ensure that the elastic pad in the coupling is intact and accurate. If damaged, it should be replaced in time.

6) Ensure that the pump assembly and pipeline system are installed accurately, firmly and reliably.

4. Disassembly and assembly of the pump

1) Disassembly and assembly of the pump head The disassembly and assembly and clearance adjustment of the pump head should be carried out according to the assembly drawing. The impeller, sleeve, rear guard plate, and seal box are equipped with lifting tools for disassembly and assembly (the lifting tools need to be ordered and purchased separately). For the disassembly and assembly method, see the "Lifting Tool Instructions".

2) Shaft seal part: The disassembly and assembly of the packing shaft seal should be carried out according to the assembly drawing. In order to ensure the sealing effect of the packing shaft seal, the shape of the packing opening should be cut as shown in the figure below as possible. When installing into the stuffing box, the openings of adjacent packings should be staggered by 108 degrees.