External Foam Pump plays a key role in many industries such as modern cleaning, chemical, agricultural and laboratory. Its main function is to convert liquid into fine foam to meet diverse application needs. However, in actual operation, insufficient flow is one of the common problems of External Foam Pump. This not only reduces work efficiency, but also may bring a series of chain reactions, affecting the overall operation effect.

Causes of insufficient flow
Blocking of pump body and internal components: With the extension of use time, scale, impurities and foam residues may accumulate inside the pump body. These deposits will cause blockage of the pump body and its internal components (such as impellers and filters), which will significantly affect the flow output.
Power supply voltage fluctuation: The instability of power supply voltage will cause fluctuations in the speed of the pump motor, indirectly affecting the stability and output of the flow.
Impeller wear: As the core component of the pump, the impeller is prone to wear during long-term high-speed operation, which in turn affects its work efficiency and flow output.
Suction pipe problem: If there are problems such as air leakage, blockage or length/diameter mismatch in the suction pipe, it will affect the suction efficiency of the pump and cause insufficient flow.
Poor sealing of the pump body: If the pump body has insufficient sealing performance, liquid leakage will directly affect the flow rate.
Improper installation position of the pump: If the pump is installed too high or too low, it will have a negative impact on the suction and discharge efficiency of the liquid, thereby affecting the flow output.

Solution
Clean the pump body and internal components: Regularly clean the pump body and its internal components, including the impeller and filter, to ensure that there are no obstructions. Special cleaning agents or high-pressure water guns can be used for cleaning to maintain the best operating condition of the equipment.
Ensure stable power supply voltage: To avoid the impact of voltage fluctuations on the pump motor, it is recommended to install a voltage stabilizer or uninterruptible power supply (UPS) to ensure a stable supply of power supply voltage.
Replace worn impellers: Regularly check the wear of the impeller and replace it in time if any problems are found. At the same time, choose a reputable impeller supplier to ensure the quality and durability of the purchased impeller.
Check and replace the suction pipe: Regularly check the status of the suction pipe to ensure that it has no air leakage, blockage, and length/diameter mismatch. If any abnormality is found, the suction pipe should be replaced or adjusted in time to ensure its normal operation.
Enhance the sealing of the pump body: Check the sealing performance of the pump body. If any leakage is found, the seal should be replaced or the sealing structure should be adjusted in time. At the same time, choose high-quality sealing materials to ensure the sealing of the pump body.
Adjust the installation position of the pump: According to actual needs, adjust the installation position of the pump to ensure that it is in the best working condition. Normally, the installation position of the pump should be lower than the liquid level to ensure that the liquid can be sucked in smoothly.

Preventive measures
Regular maintenance: Perform regular maintenance on the External Foam Pump, including cleaning, inspection and replacement of parts to ensure its long-term stable operation.
Choose high-quality accessories: When replacing parts, choose high-quality accessories (such as impellers and seals) to improve the working efficiency and durability of the pump.
Follow the instructions for use: Follow the instructions in the product manual to use the External Foam Pump correctly to avoid failures and damage caused by improper operation.