Improve the performance of self-priming sewage pump

1.Install a suction valve at the end of the suction pipe of the self-priming sewage pump.

In fact, suction valve is a kind of check valve. It ensures that the sewage water only runs from the sewage pool to the suction pipe, not vice versa. Hence, even if the scale height of the axial line of the sewage pump is higher than the working water level of the sewage pool, the sewage water still won’t flow back. In this way, the suction pipe will always be full of water. And you can make the sewage pump start automatically and quickly.

The reliability of this way of suction depends on the quality of the suction valve. For instance, if the valve is not closed tightly, or if it leaks, the water in suction pipe will flow back. With time going on, there will be no more water in suction pipe. As a result, you have to take efforts to fill the self-priming sewage pump before starting it.

2.Self-priming sewage pump can help to reduce bends of suction pipe, shorten the height difference and horizontal distance.

3.Add a suction tank in front of the self-priming sewage pump

This is to add a suction tank to the suction pipe of the self-priming sewage pump. When the pump starts for the first time, you should fill it with water. After it stops, the suction pipe of the suction tank will be higher than the water level inside the pipe. Therefore, even though the water level of the sewage pool is higher than the water level inside the tank, the water in tank still won’t flow back to the pool.

In this way, the suction tank can hold a certain amount of water. What’s more, the outlet pipe of the suction tank, that is, the suction pipe of the self-priming sewage pump, is lower than the water level inside, which guarantees that the suction pipe of the pump will always be full of water. Next time when the self-priming sewage pump starts, the water in the suction tank will be taken away, generating negative pressure inside. While the water in sewage pool will move to the suction tank under the effect of atmosphere pressure.

Add a vacuum pump on the suction pipeline of the self-priming sewage pump.

Before the sewage pump starts, the vacuum pump will start beforehand. The vacuum pump will make the suction pipe of the sewage pump be full of water, which makes sure the sewage pump starts automatically and quickly. This method needs a well developed automatic system to ensure normal working.