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The first method (simplest)

A vacuum pump is set on the suction pipe of the self-priming sewage pump. Before the pump is started, the vacuum pump is started first, so that the suction pipe of the water pump is filled with water to ensure the automatic and rapid start-up of the pump.

This kind of water absorption method needs perfect automatic control system to ensure normal operation.

The second method (simpler)

The self-priming pump reduces the inlet pipe bend, drop height and horizontal spacing.

The third method (troublesome but easy to use)

The self suction pump is equipped with a suction tank in front of the pump. In this way, a suction tank should be set up on the suction pipe of the water pump. Before the first operation of the pump, the tank should be filled with water manually. After the first operation, since the height of the water inlet pipe of the suction tank is higher than that of the water surface in the pipe, the water in the tank will not flow back and enter the pool, so a certain amount of water can be stored in the suction tank Water, because the height of the outlet pipe of the suction tank (i.e. the suction pipe of the water pump) is lower than the water surface height in the pipe, it can ensure that the water in the suction pipe of the water pump is full of water. When the water pump runs again, the water in the water tank is pumped away by the pump, and the water in the tank is added to the suction tank under the action of atmospheric pressure.

The fourth method

Suction bottom valve is installed at the end of suction pipe of self suction sewage pump. The suction bottom valve is actually a check valve, which ensures that the water flow can only enter into the suction pipe by the pool and cannot flow backward. Therefore, if the suction pipe is full of water, although the elevation of the pump axis is higher than the working water level of the pool, the water in the suction pipe will not flow into the pool because of the function of the suction bottom valve, so that the water in the suction pipe is full of water all the time, so that the pump can start automatically and quickly.

Five good methods to improve the self suction capacity of pump

Cancel the bottom valve and replace it with a simple water bucket, so as to solve the problem that the water pump can not pump water, which is very applicable

Five good methods to improve the self suction capacity of pump

The fifth method

In the pump structure, such as the following self-priming pump is directly combined with the vacuum impeller and centrifugal pump.