There are 8 factors that cause submersible pumps to fail to produce water or have insufficient flow rate. Many submersible pumps are made of cast iron or plastic materials, and it is difficult to meet customer needs with only these materials. If there are many corrosive media, such as sulfuric acid, hydrochloric acid, nitric acid, etc., they cannot be discharged; This is one of its characteristics. Another characteristic is that in addition to not rusting, it is also resistant to high temperatures. So many manufacturers have also produced high-temperature resistant stainless steel submersible pumps. Although it is stainless steel, there are many auxiliary materials that cannot withstand high temperatures. Generally, it is not a problem within 120 ° C. For example, some chemical plants that need to withstand high temperatures of over 200 ° C still need to use centrifugal pumps.
1. Submersible pumps often experience insufficient flow or no water output during operation, mainly due to:
(1) The installation height of the water pump is too high, resulting in insufficient immersion depth of the impeller and a decrease in the water output of the water pump;
(2) The water pump rotates in the opposite direction;
(3) The outlet valve cannot be opened;
(4) The outlet pipeline is not unobstructed or the impeller is blocked;
(5) The wear-resistant ring at the lower end of the water pump is severely worn or blocked by debris;
(6) The density or viscosity of the liquid being pumped is too high;
(7) Impeller detachment or damage;
(8) When multiple water pumps share the same pipeline output, there is no one-way valve installed or the one-way valve seal is not tight.
2. Exclusion measures
(1) The allowable deviation of the installation elevation of the water pump should not be arbitrarily expanded;
(2) Before the trial operation of the water pump, idle the motor and check the direction of rotation to make it consistent with the water pump. If the above situation occurs during use, check whether the phase sequence of the power supply has changed;
(3) Check valves and regularly maintain them;
(4) Clean up blockages in pipelines and impellers, and frequently remove debris from the reservoir:
(5) Clean up debris or replace wear-resistant rings;
(6) Identify the reasons for changes in water quality and take measures to address them;
(7) Strengthen or replace the impeller;
(8) Install or replace one-way valves after checking the cause.
