How to choose diesel engine water pump

Article provenance：Hai Rui ZhonglianPopularity：Publication time：2020-03-24 09:13

When the user selects diesel engine water pump, he can see the brand and product quality certificate. Never buy "three no" (that is, no manufacturer, no production date, no production license) products, otherwise there will be problems, users will be helpless.

As a user, it is difficult to make a decision due to the limitation of professional knowledge. The best way is to consult an expert on diesel engine water pump. It is recommended to consult some old diesel engine water pump users, especially those close to their own operating conditions, and purchase reliable and mature products. This is a wise choice.

1. Select the diesel engine water pump that meets the lift requirements

The so-called lift refers to the required lift, rather than the height of lifting water, which is particularly important for the selection of diesel engine water pump. The lift of diesel engine water pump is about 1.2 times of the lifting height. If the vertical height of the water source and water is 20 meters, the required lift is about 23 to 24 meters.

When selecting diesel engine water pump, the head on the nameplate of diesel engine water pump shall be close to the required head, and the deviation shall not exceed 20%. In this case, the efficiency of diesel engine water pump is the highest, more energy-saving and more economical. If the head on the nameplate is far less than the required head, the diesel engine water pump often can not meet the needs of users, even if it can pump water, the water volume is very small. On the other hand, when the pump of high head diesel engine is at low head, it will have too large flow, which will lead to motor overload. If the motor runs for a long time, the temperature of the motor increases, the winding insulation gradually ages, and even burns the motor.

2. Select diesel engine water pump with appropriate flow

The flow of diesel engine water pump, i.e. output water volume, should not be too small. It should be selected according to the needs, such as diesel water pump for irrigation, the flow can be appropriately selected.

3. Selection and purchase of water pump for agricultural diesel engine

(1) Purchase diesel engine water pump according to local conditions. There are two kinds of commonly used pumps for agricultural diesel engine: centrifugal pump and mixed pump. The head of centrifugal pump is high, but the water delivery is not large, so it is suitable for mountainous area and well filling area; the water delivery and head of mixed pump are between centrifugal pump and axial flow pump, which is suitable for plain and hilly area. Users must purchase according to local conditions, water source and water level.

(2) Proper selection of diesel engine water pump is required. After determining the type of diesel engine water pump, it is necessary to consider its economic performance, especially pay attention to the selection of the head and flow of diesel engine water pump and its supporting force. It must be noted that the head (total head) indicated on the diesel engine water pump sign is different from the head (actual head) when it is used, because there will be certain resistance loss when water flows through the water pipe and pipeline. Therefore, the actual lift is usually 10% - 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 label can be estimated. The power of the diesel engine pump can be selected according to the power indicated on the label. In order to start the diesel engine water pump quickly and safely, the power of the power engine can 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 the diesel engine water pump, you can purchase the diesel engine water pump according to the power of the power engine.

(3) The purchase of diesel engine water pump shall be strictly implemented. When choosing and purchasing, we should check the "three certificates". Only three certificates are complete can we avoid buying out of date products and inferior products.

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