What is the reason why household self priming pumps can t keep water?

The inability of household self-priming pumps to retain water should be the cause of leakage of the pump's gasket, or the reason why the valve is not closed tightly.

The reasons why the self-priming pump cannot pump water: 1. The voltage may be too low and the voltage needs to be adjusted. 2. It may be that the suction lift is too high or the suction pipeline is too long, and the suction lift needs to be reduced or the pipeline shortened.

3. It may be that the mechanical seal leaks too much and needs to be repaired or replaced. 4. It may be that the filter screen of the pump body or the inlet pipeline is blocked by debris stones, and the blockage needs to be checked and cleaned up. 5. It may be that the self-priming pump pump body is not filled with liquid storage or the liquid storage is insufficient, and it is necessary to add sufficient liquid storage.

6. The impeller may be damaged or worn, and the impeller should be replaced with a new one. 7. It may be that the outlet pipeline is installed incorrectly, there are too many elbows, and there are too many pipes in an N-shaped shape, and it is recommended to install an automatic exhaust valve at the highest point.

There may be several reasons why the self-priming pump cannot be watered:

Inlet pipeline leakage or inlet valve not opened: Inlet pipeline leakage or inlet valve failure to open will cause the self-priming pump to fail to generate enough negative pressure and thus fail to self-prime.

Inlet pipe blockage: Inlet pipe blockage can affect the flow of water, resulting in self-priming pumps not being able to self-prime.

Poor sealing of self-priming pumps: Poor sealing of self-priming pumps will cause the negative pressure generated when sucking water to fail to form a stable vacuum, which will affect the self-priming ability of self-priming pumps.

Water leakage inside the pump body: The seals inside the self-priming pump are damaged or loose, which may cause water to leak out of the pump body, thus affecting the self-priming ability of the self-priming pump.

Worn or damaged impellers: Worn or damaged impellers of self-priming pumps may result in reduced pump efficiency, which can affect the self-priming ability of self-priming pumps.

Depending on the cause, the treatment may be different, as follows:

Check whether the inlet pipeline is leaking or whether the inlet valve is not opened, and if any problems are found, they should be repaired or adjusted in time.

Check the inlet pipe for blockages, you can clean or replace the pipe, or increase the pipe diameter to increase the water flow.

Check whether the self-priming pump seal is good, you can replace the seal or adjust the sealing tightness.

Check the inside of the pump body for water leakage, replace the damaged seal or adjust the tightness of the seal.

Check whether the impeller of the self-priming pump is worn or damaged, and the impeller can be replaced or repaired.

It should be noted that not all of the above methods can solve the problem, and the specific treatment method needs to be selected according to the specific situation. In addition, it is also necessary to pay attention to regular maintenance of the self-priming pump, timely cleaning of the pipeline and replacement of worn parts to ensure the normal operation of the pump.

Treatment method: Block the water inlet with your hands, add water diversion and electricity, the suction is small, the water seal may be broken, and the suction is large and the water inlet is leaking. Generally, suck the hand pump for 30 seconds and bring it up, (try the pump leakage first) safety first.

Self-priming pumps work by filling the casing with water (or containing water in the casing) before the pump starts. After starting, the high-speed rotation of the impeller makes the water in the impeller channel flow to the vortex shell, and then the inlet forms a vacuum, so that the water inlet backstop door is opened, and the air in the suction pipe enters the pump, and reaches the outer edge through the impeller channel.

Reasons why the self-priming pump does not produce water:

The pumping medium contains a large amount of sediment, and if the water does not appear after a period of use, then there may be a blockage in the pump, and it is necessary to clean it up or use other non-clogging pump products.

A larger diameter of the suction pipe than the pump port will also cause the self-priming time of the self-priming pump to be too long, which will lead to a decrease in the self-priming performance of the self-priming pump, so it is recommended to choose a pipeline that matches the inlet of the self-priming pump.

The pipe of the self-priming pump is too long and can also lead to this situation, the pipe that is too long is easy to accumulate air inside, and the self-priming pump needs to extract all the air accumulated in the pipeline to complete the discharge before it can form a negative pressure state and start to absorb water, so the pipeline of the self-priming pump should not be too long.

The self-priming pump needs to be filled with water and run for 5 minutes and then shut down for inspection, to ensure that there is no suction sound near the inlet pipe and near all possible air leakage points, the self-priming pump will become a negative pressure state after a period of operation, and the gas outside the pipeline will be sucked into the pipeline after the shutdown.

The temperature of the liquid medium pumped by the self-priming pump is too high, and cavitation occurs in the pump, in which case we need to reduce the temperature of the liquid or fill the pump with cold water before starting.

There are many reasons why self-priming pumps do not water. The self-priming pump you just bought doesn't have water, you have to add some water, and the self-priming pump needs to be diverted to the water. If the self-priming pump that has been used for a long time does not get water, it may burn out and need to be repaired or replaced.

1. Use a self-priming pump for the first time.

The self-priming pump does not need to add water when the self-priming pump starts, and relies on its own impeller rotation to drive the transmission of liquid medium in the pipeline, and the larger the sealing gap of the impeller, the lower the self-priming height. This is not to say that the self-priming pump does not need to add water, after the first installation of the self-priming pump, it is still necessary to fill the water and use the impeller of the self-priming pump to suck the water up.

2. The self-priming pump has a long time to be watered; The reasons for this situation may be: less water diversion, loose screws in the inlet and outlet caps of the self-priming pump, insufficient sealing of the inlet pipe, and small self-priming pump (in this case, you can consider replacing a self-priming pump with a larger suction stroke).

3. The self-priming pump works unsteadily and often stops working for a short time. In this case, it is recommended to check whether the physical structure or accessories of the self-priming pump are damaged, and whether there are foreign objects inside the self-priming pump, such as weeds.

4. The water output of the self-priming pump is small; When the self-priming pump has water but the water output is not very large, first of all, check whether the gap between the lower impeller and the casing mouth ring is too large, and you can consider changing the casing or impeller mouth ring, and secondly, there is gas storage in the water pump is also a possible reason.

First, another possibility is that the impeller's water flow pipe is blocked by foreign objects, and there is serious wear of the packing.

1) Water seal mechanical wear and air leakage;

2) There are foreign objects blocking the inlet pipe and outlet pipe;

3) declining groundwater levels;

Adjust the appropriate amount of a pressure switch. Check if there is any air leakage and vent the air in the tank.

In general, the reasons why the self-priming pump does not absorb water may be: 1The water inlet of the pump is blocked, so that the water flow is not smooth, or the water resistance is too large to form a vacuum; 2.

The filter inside the pump is clogged, blocking the flow of water; 3.The air resistance inside the pump is too great to form a vacuum; 4.The internal air resistance of the pump is too small, so that the water flow is not smooth; 5.

There are air bubbles inside the pump that stop the flow of water; 6.There is debris inside the pump, blocking the flow of water; 7.The speed of the pump is too low, which affects the suction of water; 8.

The drain of the pump is blocked, making the water flow poor; 9.The motor failure of the pump affects the operation of the self-priming pump; 10.There is a problem with the distributor of the pump, which affects the operation of the self-priming pump.

The reasons and solutions for the self-priming water pump not to water are as follows:

1.Voltage too low: Adjust the voltage.

2.Suction lift is too high or suction line is too long: Lower suction lift or shorten the line.

3.Excessive leakage of mechanical seals: repair or replacement.

4.The filter screen of the pump body or the inlet pipe is blocked by debris stones: check and clean up the blockage.

5.The self-priming pump pump body is not filled with reservoir or the reservoir is insufficient: fill up.

6.Damaged or worn impeller: Replace the impeller with a new one.

7.Incorrect installation of outlet pipes, too many elbows: There are too many pipes in an N-shaped shape, and it is recommended to install an automatic exhaust valve at the highest point.

8.Three-phase motors are reversed: two phases are swapped.

9.The return hole of the self-priming pump is blocked, so that the steam and water cannot be separated: check and clean it.

10.Suction pipeline leakage: Eliminate the phenomenon of pipeline air leakage, check the method within the allowable suction range, the pump starts for 4-5 minutes, and the water has not been sucked up, please use your ears close to the inlet pipeline to listen to the sound of inhalation, or coat white latex in the suspected air leakage and other methods to repair.

The self-priming pump keeps turning, even when no water is flowing through, it may be due to one of the following reasons:

There may be an air leak at the inlet of the pump, which prevents the pump from self-sucking water to the retained water, and thus fails to start the stop machine to destroy the hail.

There may be a problem with the pump's mechanical seal, preventing the pump from pumping water in.

There may be damage or deformation of components in the pump body, such as impellers, shafts, etc.

In view of the above situation, you can try the following to solve the case of Fang Xian's suspicion:

Check the inlet of the pump for air leakage, if there is air leakage, it can be repaired with sealing materials.

Check the pump's mechanical seals and replace them with new ones if there are problems.

Inspect the components in the pump body for damage or deformation, and replace or repair them if there is a problem.

If the above methods still do not solve the problem, it is recommended to ask professional maintenance personnel for inspection and maintenance.