1. it is necessary to open the discharge valve
The gas in the suction pipe of the self suction pump depends on the self suction pump starting after starting, so it is necessary to open the valve to discharge the gas from the discharge port.
2. a full amount of liquid is required in the cavity of the self suction pump
The self suction vacuum degree of the self suction pump at different rotational speeds has a great influence on the self suction vacuum degree, and the influence of the speed is weakened until the limit vacuum degree is close to the limit vacuum. Let we open our eyes to see this awesome solution.
The common misoperation of self-priming pump is: lack of storage liquid or storage fluid in the pump, air leakage in suction pipe, low voltage, excessive suction or too long suction line.
The test of a certain type of self-priming centrifugal pump shows that the gas extraction can be closely related to the liquid in the pump. When the liquid volume of the self suction pump reaches 3.5L, the vacuum degree can reach 9m. When the liquid storage is greater than 3.5L, the speed of the vacuum degree increases with the amount of liquid storage. In order to ensure the speed and reliability of pumping, a full amount of liquid should be filled in the pump chamber before launching. As a result, the amount of 3.5L is most appropriate. Too little self - suction pump can not play the same effect. The self-priming centrifugal pump has the liquid cycle in the cavity of the pump during the suction process. The vacuum degree is added with the amount of liquid stored in the pump. If there is no liquid in the self-priming pump, it can not form a mixture of gas and liquid foam, nor can it be pumped. When the pump liquid in less than 1.5L, the vacuum degree is very small, and the pump condition of instability, the air leakage into the pump cycle, will stop, not for pumping; pump water is greater than 2.OL, under the tongue blocking backwater, not leak air pump, then began pumping.
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