Why the vertical self-priming pump suction water
The vertical self-priming pump can not suck up water, because the suction pipe of the self-priming pump is not tightly sealed, and the self-priming pump has always been in the condition of pumping air, so the self-priming pump can not suck up water. The solution is to check the inlet pipe of the self-priming pump seal repair leakage point, such as welding, pipe joints and other suspected possible leakage of the local to carefully check, for example, you can choose to run for about 5 minutes after the stop close to the pipe to listen to the sound of inspiration.
The use of vertical self-priming pump for a period of time because of corrosion or wear, mechanical seal leakage phenomenon will be the reason why the self-priming pump can not suck up the water, replace the new damaged parts can solve the problem. Because there is more debris in the liquid delivered, which leads to blockage in the pipeline or the bottom valve or even the pump body, it will also be the reason why the self-priming pump cannot suck up water. Finding the specific blocking point and sorting out the debris can solve the problem. Because the import pipeline installation is not reasonable, such as the number of elbow is too much, the number of elbow is as far as possible to control in 1-2 2 elbow elbow as far as possible to choose 45 degrees elbow is better, the pipe diameter does not match the pump diameter to increase without authorization will also lead to self-priming pump suction water. Self-priming pump suction the water come up after the second exercise to infuse water qualities to suck up to clarify with air into the pump body inside, for example, self-priming pump outlet pipe no cut-off valve for export unicom atmosphere after downtime will present the water back in the air can be inhaled into the pump body in because there are air into the next startup also needs to infuse water exhaust ability to suck up the water. The solution to this self-priming pump suction water is to install a stop valve and ball valve at the outlet before stopping the export valve closed and then shut down can solve the problem.