Why does the self priming pump start and stop frequently?

There may be several reasons why self-priming pumps frequently start and stop automatically:

1.The water inlet is too small: the self-priming pump needs a certain water inlet flow to work properly, if the water inlet is too small, air will appear in the pump, causing the pump to start and stop automatically.

2.Air leakage in the inlet pipe or pump body: The self-priming pump needs to establish negative pressure inside the pump body in order to suck the liquid into the pump, if there is an air leak inside the pump body or the air leakage in the inlet pipe, the negative pressure cannot be formed, resulting in the pump automatically starting and stopping.

3.Unstable power supply voltage: Self-priming pumps require a stable power supply**, and if the supply voltage is unstable, the pump's motor will start and stop frequently.

4.Fouling or foreign matter blockage inside the pump: If there is fouling or foreign matter blockage inside the self-priming pump, it will affect the normal operation of the pump, resulting in frequent start and stop of the pump.

5.Faulty pressure switch: Self-priming pumps are usually equipped with a pressure switch to control the start and stop of the pump, and if the pressure switch fails, it will cause the pump to start and stop frequently.

If the self-priming pump starts and stops automatically frequently, it is recommended to check whether the inlet water is sufficient, whether the pump body and inlet pipe are leaking, whether the power supply is stable, whether there is scaling or foreign matter blockage in the pump, and whether the pressure switch is normal. Take corresponding measures according to the specific situation, if the problem persists, it is recommended to contact professional maintenance personnel for maintenance.

1.Due to the long distance and high height of the conveying distance, the pressure required is large, and the pressure set on the pressure controller cannot meet the requirements of use, so the controller cover can be opened first and then the flat screwdriver can be used.

Turning the middle adjustment knob clockwise upwards for a higher disconnect pressure will solve the problem.

2.Fully automatic self-priming pump.

The reason for frequent start may also be due to the fact that there is no gas in the pressure tank on the self-priming pump, you can unscrew the gas nut on the pressure tank and add it with a pump.

3.Since the user installs the self-priming pump, there is no check valve installed at the inlet and outlet.

As a result, the water returns quickly after the pump is stopped, and the outlet pressure drops so it is lower.

The most likely problem is that the outlet pipe of the self-priming pump is ruptured, which causes the pressure generated by the self-priming pump to fail to reach the pressure of automatic shutdown, and the self-priming pump is in a state of non-stop operation. Therefore, it is necessary to detect the location of the water pipe leakage in time, repair or replace it to ensure normal use.

Precautions for using self-priming pumps:

1. When the entire pump body of the self-priming pump is fixed, the steel pipe can be used to connect the water inlet of the self-priming pump, and the foot valve of the self-priming pump needs to be in a vertical state with the horizontal plane to ensure normal use in the later stage. In addition, the foot valve of the self-priming pump needs to be kept above 35cm from the bottom of the water to avoid the self-priming pump from sucking sediment.

2. Close the switch of the self-priming pump and let it rotate for about 5 minutes to see if it can operate normally and determine whether the steering is in a normal state. In addition, during the operation of the self-priming pump, its voltage needs to be within the range of 12% and +5% of the rated voltage, and beyond this range, it is very likely to cause the self-priming pump to burn out.

3. In order to prevent the accident of electric shock, it is necessary to take preventive measures, at this time, a leakage circuit breaker or electric shock safety device can be installed on the self-priming pump, and the self-priming pump should be grounded. In addition, it is necessary to check whether the bolts of the self-priming pump will be loose, whether the power cord is secure, etc.

The reason why the self-priming pump keeps ringing at night is that there is a leak in the outlet pipe, so the pressure of the pump cannot reach the pressure value set by the pressure switch to stop working, so the pump will always work, Solution: Check whether the outlet pipe is damaged. The working principle of a self-priming pump is:

1.The casing is filled with water (or the casing itself contains water) before the pump is started.

Can the pressure of the household self-priming pump be too small to start and run normally?

1. Due to the long distance and high height of the conveying, the pressure required is larger, and the pressure set on the pressure controller cannot meet the requirements of use, so you can open the controller cover first and then turn the adjustment knob in the middle clockwise upward with a flat-mouth screwdriver to obtain a higher breaking pressure.

2. The reason for the frequent start of the automatic self-priming pump may also be due to the fact that there is no gas in the pressure tank on the self-priming pump, you can unscrew the aerated nut on the pressure tank and add gas to it with a pump to make the pressure tank play a role in stabilizing the pressure. It should be noted that not every automatic self-priming pump has the function of refueling the stabilizer tank, for example, the ordinary household self-priming pump does not have a gas hole, if you need to use a self-priming pump that can refuel the air pressure tank, it is recommended to choose: hm type tap water household self-priming pump.

3. Because the user does not install a check valve at the inlet and outlet when installing the self-priming pump, the water returns quickly after the pump is stopped, and the outlet pressure drops, so the automatic self-priming pump will start again after the preset pressure is lower. The solution to the frequent start of this fully automatic self-priming pump is that the self-priming pump can solve the problem by installing a check valve at the outlet.

4. Because the faucet is not closed, or there is water flowing out of other places to cause the outlet pressure to drop after the self-priming pump will also be automatically started, check the closed state of the faucet, find the first water leakage phenomenon is the solution to the frequent start of the automatic self-priming pump, the leakage is not a ridge, the use of hm type tap water household self-priming pump will not appear the phenomenon of frequent start and stop of wheel laughter.

5. If the automatic self-priming pump is in good condition before using it for a period of time, and there is a sudden phenomenon of frequent start and stop, then it is possible that the automatic switch is broken, and you can replace an automatic switch to see if there is still the fault.

1.If the self-priming centrifugal pump is in good condition before use, the sudden occurrence of frequent start and stop is likely to be the damage of the switch, and the adjustment method is to replace the damaged switch.

2.It is very likely that the self-priming pump will start by itself after the outlet pressure drops due to the faucet not being closed or water flowing out of other locations.

3.The reason for the frequent sound and stop of the stainless steel self-priming pump may also be because there is no gas in the pressure tank above the self-priming pump, and the adjustment method is to unscrew the gas nut on the pressure tank and add gas to it with a pump to ensure that the pressure tank can play a role in stabilizing pressure, and the position of the air filling hole can refer to the structure diagram of the self-priming pump. It is important to note that every self-priming pump can be used to refill the stabilizer tank.

4.Because the pumping distance is long and the height is higher, the required pressure is relatively large, and the pressure set on the pressure controller can not meet the requirements of use, so you can open the controller cover first, and then use a flat screwdriver to turn the adjustment knob in the middle clockwise upward to obtain a higher disconnection pressure for adjustment.

5.Because the user does not install a check valve at the inlet and outlet when installing the self-priming pump, the water stops and returns quickly, and the self-priming pump will start again after the outlet pressure drops below the preset fiber pressure, and the solution to the self-priming pump is to install a check valve at the outlet of the self-priming pump for adjustment.

1.If the pump does not stop watering, it is generally a leak somewhere in the outlet pipeline of the pump, or the pressure and closing switch of the pump is out of order, or the check valve on the inlet pipeline of the pump is damaged. 2.

The phenomenon of non-stop water in the pump can also be caused by damage to the pump turbine of the water pump. If the pump turbine is damaged, the water pressure of the pump will never reach the rated value, which will naturally cause the pump to keep supplying water. 3.

When the water pump keeps replenishing water, a pressure switch, a water level controller or a floating switch can be installed in the water tank to control the motor power supply of the water pump and solve the phenomenon of the water pump constantly replenishing water. 4.In this way, when the water level in the pump reaches the set high water level, the pump will automatically stop the water intake.

When the water level in the pump drops to the set low water level, the water pump will automatically start replenishing water, which is very convenient. 5. When the pump runs out, if you need to stop using it, then you need to close the valve on the outlet pipe first, and then let the pump stop running. If it is in the cold winter, then the residual liquid in the pump and the water in the cooling chamber of the cover bearing should be discharged first to avoid freezing and cracking.