Horizontal multistage centrifugal pump installation

1. Preparation before installing horizontal multistage centrifugal pump

1) The foundation for the pump should be strong enough. Its quality should be about 3 to 5 times of the quality of the pumping unit.

2) Inspect the pump head and the motor to see if it is damaged during transportation; inspect if any accessory of the pump is lost.

3) Prepare tools and hoist.

2. Installation sequence

1) Put a steel sizing block and an iron wedge under the pump base. Use the hoisting hooks to hold the four corners of the pump base, pull the base up above the foundation, and then slowly put it down on the foundation, making sure it faces each screw hole correctly.

2) Make the base flat, tighten the foundation bolts, and pour liquid toward the foundation.

3) Adjust the pumping unit. There should be 3mm to 5mm clearance between the coupling of the pump and the coupling of the motor, when the coupling reaches the furthest distance on pump shaft. The axial lines of pump head and motor should coincide. Feeler gauge can be used to measure the evenness of clearance between the cross sections of the two couplings, allowable error 0.06mm. Ruler can be used to measure at any direction around the two couplings. The allowable error for clearance between external surfaces of the two couplings and the ruler should be 0.08mm. If the above requirements are not meet, you can use adjustable pads to adjust it.

4) Connect the outlet pipes, add vacuum meter and pressure meter to the suction pipe and the discharge pipe respectively.

Horizontal multistage centrifugal pump starting, running and stopping

Starting:

1) Before starting the pump, check if the oil level of shaft bearing is normal and then lubricate the bearing with dilute oil.

2) Before starting the pump, you must check if the motor is rotating in the correct direction.

3) Before starting the pump, turn the coupling of the pump with hand to see if the rotating parts rotate flexibly.

4) Check all the meters, gauges, valves and instruments to see if they are normal.

5) Before starting the pump, you should inject water into it or exhaust the air inside and turn off the sluice valves and pressure meter switch on the outlet pipe of the pump.

6) When the pump has been started, turn on the switch of pressure meter and the switch of vacuum meter. Gradually turn on the sluice valves on the outlet pipe of the pump until the pointer of pressure meter moves to the position we need.

Running:

1) When the pump is running, pay attention to detect the temperature of the shaft bearing of the water pump. The temperature should not rise more than 35 degrees centigrade on average. The maximum temperature should not exceed 75 degrees centigrade.

2) Note to add oil frequently to the water pump when it is running.
3) It is normal if the packing chamber leaks water 10 to 20 drops per minute. If the leakage is beyond this range, you should adjust the packing gland.

4) Check the coupling regularly.

5) If the horizontal multistage centrifugal pump goes out of order during the operation, you should stop it at once and repair it with reference to the Trouble-shooting Table.

Stopping:

Slowly turn off the sluice valves and pressure meter switch on the water outlet pipe, and the vacuum meter switch on discharge pipe. After that, cut off the power source for motor.