A centrifugal pump may face many technical problems. So, technical knowledge is necessary to Troubleshoot the Problem in Centrifugal Pump.
We should have knowledge about the cause of the problems and their remedies.
Trouble Shooting in Centrifugal Pump
| Serials | Problems |
|---|---|
| (A). | Water discharge |
| (B). | Low water discharge |
| (C). | Discontinued water discharge |
| (D). | Less pressure |
Go to second part: Centrifugal pump troubleshooting 02
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(A): Problem with water delivery
Situation: No water discharge
| S. N. | Causes | Explanation | Trouble Shooting |
|---|---|---|---|
| 01. | No proper priming | Casing and and pipes are not completely filled with water | Do proper priming |
| 02. | Height of delivery head | Height of the discharge is too high | Adjust it. |
| 03. | Speed of the pump | The speed of pump is insufficient for the head | 01: Adjust the belt. 02: Adjust the driving pulley. |
| 04. | Air leaking | When air leaking occurs in packing gland in suction pipe. | Replace the packing glands. |
| 05. | Height of suction height | When suction height is too high | Lower the pump, it should near the water source. |
| 06. | Clogging | If there is clogging in- 1. Impeller. 2. Suction pipe. 3. Foot valve | Chek all the three parts, and rectify. |
| Direction of shaft | If there is a wrong direction of the impeller shaft | Adjust the direction of the impeller shaft. |
(B). Low water discharge
Situation: There is low water discharge
| S. N. | Causes | Explanation | Trouble Shooting |
|---|---|---|---|
| 01. | Pump speed | When pump speed is slow | 1. Just increase the speed of pump. 2. Use best size pulley. |
| 02. | Sunction lift height | When suction lift height is high | Lower down the pump nearer to the source of water. |
| 03. | Height of discharge head | When discharge head is higher than the normal height | 1. Adjust friction of the pipe. 2. Increase the diameter of pipe. |
| 04. | Clogging | If there is clogging in: 1. Impeller 2. Suction pipe | 1. Clean the pipe. 2. Clean the impeller. |
| 05. | Air pockets | If there is air pocket in suction line | Join the two separate pipes, tightly. |
| 06. | Stuffing box problems | 1. Worn stuffing box packing 2. Air lockage into pump casing | Replace them. |
| 07. | Size of foot valve | The size of foot valve is small | Choose and fit correct-size foot valve. |
| 08. | Situation of foot valve | Shallow footed foot valve | Fit it in deep water. |
| 09. | Old impeller | Or it is damaged | Replace it. |
| 10. | Packing of casing | When there is defect in pump casing | Replace it. |
| 11. | Wearing ring | Damged wearing ring | Replace it. |
(C). Discontinued water discharge
Situation: No continue water delivery during irrigation
| S. N. | Causes | Explantion | Trouble Shooting |
|---|---|---|---|
| 01. | Air leackage | When air leaks through glands | Tight the packing glands inside stuffing box. |
| 02. | Air leackage | When there is air leackage through glands in the suction line | Remove that segment. |
| 03. | Choking | Choking of impeller | Clean the impeller. |
| 04. | Choking | Choking of strainer of foot valve | Clean the foot valve. |
| 05. | Water level | When water level is low | Lower the foot valve. |
| 06. | Problem with belt | If there is a slipping belt | Tight it. |
| 07. | Speed of engine | When the speed of engine is low | Increase it. |
| 08. | Priming | When clogging occurs in foot valve. | Clean the foot valve of pump. |
(D). Less pressure
Situation: Low water pressure while irrigation
| S. N. | Causes | Explanation | Trouble Shooting |
|---|---|---|---|
| 01. | Low speed | Pump speed is low | Increase the speed of engine. |
| 02. | Leakage | There is a leakage in suction line | Spot the leakage. |
| 03. | Damage impeller | When impeller is damaged | Replace it. |
| 04. | Problem with packing | If there is a defect in packing | Replace it. |
| 05. | Clogging | 1. Clogging in suction line 2. Clogging in trainer 3. Clogging in foot valve | Clean all. |
| 06. | Length of suction line | When it is too long | Reduce it to a reasonable length. |
| 07. | Clogging | If there is clogging in impeller | Clean it. |
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