How The Automatic Self-priming Pump Works

If the suction liquid level of the Automatic Self-priming Pump is below the impeller, it should be pre-filled with water when starting up, which is very inconvenient. In order to store water in the pump, a bottom valve needs to be installed at the inlet of the suction pipe. When the pump is working, the bottom valve will cause a large hydraulic loss. The so-called self-priming pump means that it does not need to be irrigated before starting (it still needs to be irrigated for the first time after installation), and after a short period of operation, the pump itself can suck up the water and put it into normal operation.

Automatic Self-priming pumps are divided into the following categories according to the principle of action:

1. Gas-liquid mixed type (including internal mixed type and external mixed type);
 
2. Water ring wheel type;

3. Jet type (including liquid jet and gas jet).

The working process of the gas-liquid hybrid self-priming pump: due to the special structure of the pump body of the self-priming pump, after the pump stops, there is a certain amount of water in the pump body, and after the pump starts again, due to the rotation of the impeller, the air and water in the suction pipeline Fully mixed and discharged to 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 pipe until all the gas in the pump and suction pipe is discharged to complete the self- Suction, and pump normally. The wheeled self-priming pump of the water ring is that a water ring wheel and a water pump vane are combined in a housing, and the gas is discharged by means of the water ring wheel to realize self-priming. After the pump works properly, the passage of the water ring wheel and the water pump vane can be blocked by a valve, and the liquid in the water ring wheel can be bleed off. The jet-type self-priming pump combined with a centrifugal pump and Jet injector (or sparger), and relies on injection apparatus, causing a vacuum to realize suction at the nozzle place.