Vertical Multistage Pump

Application

Mechanical seal material list

Motor & Key Parts Comparison – Impeller & Pump shaft

Check the above shaft & impeller photo to understand more clearly the different structure.

Inlet/outlet Connection Type

Vertical Multistage Pump Installation

To avoid damage of vertical multistage pumps, take the following actions before installing the vertical multistage pumps.

1. Check the pump and the motor are in good conditions before installation.

2. The arrow sign on the bottom cover indicates the pump’s discharge direction. (See Figure 4)

3. The pump can be installed vertically or horizontally. To provide the pump with good cooling condition, the pump must be installed in a place where is well ventilated.

4. In order to reduce noise and vibration as far as possible, always use flexible or soft hoses on the suction and discharge; Especially, the pump should be installed on a vibration proofed base.

Set a valve on the suction and discharge tubes separately, as a results, it will be better to provide convenience to pump maintenance.

Set non-return valves can protect the pump from damage by water hammer.

5. Prevent air came into pipes  when installing the pipelines, particularly in the suctions pipeline, because air in the pipelines will reduce the performance.

6. When the discharge pipeline stretches downward for a long distance, or when there is a risk of siphonage, or to prevent dirty liquid from flowing back to the pump it is recommend to set a drain valve on the pipe that closes to the discharge port.

7. Electrical wirings must be done by specialized electricians according to the local electrical regulations. The pump must be earthed effectively.

Vertical Multistage Pumps Maintenance

1. Shut off  the power before maintenance.

2. Maintenances of the splined shaft and shaft seal are not necessary.

3. When the pump remains inactive for a long period, pls check as following:

a. Firstly, remove one of the coupling guards;

b. Secondly, apply a few drops of silicone oil on the shaft seal to prevent it from being stuck when the pump is put in use again;

c. Finally drain the pump completely.

4. When the temperature of the transported liquid is lower than its freezing temperature, in order to provent the damage to pumps, you have to check the liquid is not frozen inside the pump before starting the pump.

5.  During frost season, always drain the pump completely after using the pump, because the frozen of water inside the pumps will damage pump’s part, may result in the complete loss of whole pumps.

Related Important Resources

Video about Pumps

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