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There are many types of self priming pumps, it is not easy to choose a suitable one

Author: admin Source: the internet Posted On: 2020/6/15 9:37:48

There are many types of self priming pumps, and the quality is also uneven. How to choose a suitable self priming pump has become a problem that novice users need to solve urgently.
  Self priming pumps rely on the centrifugal force of the impeller to agitate the fluid to generate pressure and transport the fluid. When choosing a self-priming centrifugal pump, it is necessary to determine the purpose and performance of the pump and select the pump type. This choice must first start from the selection of the type and form of the pump, so what principle does the self-priming pump choose? Let's find out...
   1. Choose self priming pumpp according to local conditions
The working process of the gas-liquid mixed self priming pump: due to the special structure of the self priming pump body, after the pump stops, there is a certain amount of water in the pump body. After the pump is started again, due to the rotation of the impeller, the air and water in the pipeline are sucked Fully mixed and discharged into the gas-water separation chamber, the gas in the upper part of the gas-water separation chamber overflows, the water in the lower part returns to the impeller, and re-mixes with the remaining air in the suction line until all the gas in the pump and suction pipe is discharged. Aspirate and pump water normally. The water ring wheel self-priming pump is to combine the water ring wheel and the water pump impeller in a casing, and discharge the gas by the water ring wheel to achieve self-priming.
   2. The water pump should be properly selected
  After determining the type of pump, we must consider its economic performance, especially pay attention to the choice of pump head and flow rate and its supporting power. It must be noted that the pump head (total head) indicated on the pump's label is different from the water outlet head (actual head) in use, because there will be a certain resistance loss when the water flows through the water pipe and the pipeline. Therefore, the actual head is generally 10% to 20% lower than the total head, and the water output is also reduced accordingly. Therefore, in actual use, it can only be estimated from 80% to 90% of the head and flow rate marked on the sign. The choice of power for the pump can be selected according to the power indicated on the sign. In order to make the pump start quickly and use safely, the power machine The power can also be slightly larger than the power required by the water pump, generally about 10% higher; if you already have power, when you buy a water pump, you can buy the matching water pump according to the power of the power machine.
   3. Strict procedures are required to purchase water pump
  When purchasing a water pump, we still need to verify that only three certificates are complete to avoid the purchase of obsolete products and inferior products.
   4. After determining the type of pump, we must consider its economic performance, especially pay attention to the choice of pump head and flow rate and its supporting power. It must be noted that the pump head (total head) indicated on the pump's label is different from the water outlet head (actual head) in use, because there will be a certain resistance loss when the water flows through the water pipe and the pipeline. Therefore, the actual head is generally 10% to 20% lower than the total head, and the water output is also reduced accordingly.



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