Methods for selecting and purchasing diesel engine water pumps

1. Select a diesel engine water pump that meets the lift requirements
The so-called lift refers to the required lift, rather than the height of water lift, which is particularly important for selecting diesel engine water pumps. The lift of the diesel engine water pump is about 1.2 times the water lifting height. If the vertical height of the source and water is 20 meters, the required lift is approximately 23 to 24 meters.
When selecting a diesel engine water pump, the lift on the nameplate of the diesel engine water pump should be close to the required lift, with a deviation of no more than 20%. In this case, the diesel engine water pump has the highest efficiency, is more energy-saving, and is more economical to use. If the lift on the nameplate is far less than the required lift, the diesel engine water pump often cannot meet the needs of users, and even if it can be pumped, the amount of water is very small. On the other hand, when the high lift diesel engine water pump is at a low lift, excessive flow will occur, resulting in motor overload. If the motor operates for a long time, the temperature of the motor increases, the insulation layer of the winding gradually ages, and even burns out the motor.
2. Select a diesel engine water pump with appropriate flow
The flow rate of the diesel engine water pump, that is, the output water volume, should not be too small. The selection should be based on needs, such as diesel water pumps for irrigation, and the flow rate can be appropriately selected.
3. Selection and procurement points of agricultural diesel engine water pump
(1) Purchase diesel engine water pumps according to local conditions. The commonly used agricultural diesel engine water pumps include centrifugal pumps and mixing pumps. The centrifugal pump has a high lift but a small water delivery capacity, which is suitable for use in mountainous areas and irrigation well areas; The water delivery and lift of the mixing pump are between the centrifugal pump and the axial flow pump, suitable for plain and hilly areas. Users must purchase according to local conditions, water sources, and water levels.
(2) Proper selection of diesel engine water pumps is required. After determining the type of diesel engine water pump, it is necessary to consider its economic performance, paying particular attention to the selection of the lift, flow rate, and support force of the diesel engine water pump. It must be noted that the head (total head) indicated on the label of the diesel engine water pump is different from the head (actual head) when in use, because there will be a certain resistance loss when water flows through water pipes and pipelines. Therefore, the actual lift is typically 10% to 20% lower than the total lift, and the water volume is correspondingly reduced. Therefore, in actual use, only 80% to 90% of the head and flow rate of the sign can be estimated. The power of the diesel engine pump can be selected based on the power indicated on the label. In order to make the diesel engine water pump start quickly and safely, the power of the power engine can also be slightly greater than the power required by the diesel engine water pump. Generally speaking, it is about 10% higher. If there is electricity, when purchasing a diesel engine water pump, you can purchase a diesel engine water pump based on the power of the power machine.
(3) The procurement of diesel engine water pumps should be strictly implemented. When selecting and purchasing, we should check the "three certificates". Only if all three certificates are complete can we avoid purchasing outdated and inferior products.