How to repair a vacuum pump that cannot extract liquid?

In simple terms, a vacuum pump is a device that uses various methods to create and maintain a vacuum in a sealed space. Improper operation of a vacuum pump often leads to malfunctions. Common vacuum pump failures in daily production include: insufficient vacuum; excessively high temperature of the pump bearings; abnormal operation of the motor or vacuum pump; oil leakage or spraying; difficulty starting the vacuum pump; and the vacuum pump failing to extract liquid. Below, we will provide detailed solutions to the problem of a vacuum pump failing to extract liquid, helping you troubleshoot vacuum pump failures and ensure the vacuum pump performs at its best.
How to reduce the energy consumption of vacuum pumps?

A. Rationally select vacuum pump materials

To ensure the vacuum unit's operating life is over 4 years, choose materials that are inexpensive and easy to cast. For corrosive liquids and other media, corrosion-resistant flow parts can be selected, and stainless steel materials can be used. Of course, the specific selection should be based on the actual needs of the industry.
B. Rationally Determine the Output of the Vacuum Pump

First, it is necessary to ascertain the resistance of each stage of the vacuum pump system and eliminate any abnormal phenomena of excessive resistance. Second, consider the maximum pumping capacity under the combined influence of various adverse factors, and then determine a safe and economical system pressure based on operational requirements. Finally, modify the output configuration of the vacuum unit according to the total pumping capacity, ensuring safety while operating the system at medium speed, so that the vacuum level and pumping capacity required for the operating conditions match the efficiency of the vacuum pump.
C. Utilize pipelines effectively

Employ a close combination of theoretical calculations and model experiments, selecting reliable and efficient pipelines, and ensuring that the allowable vacuum level is achieved at the lowest possible pumping rate.

D. Maximize the potential of the electric motor
How to repair a vacuum pump that cannot extract liquid? Dongguan Punok Vacuum Technology Co., Ltd. states that there are eight possible reasons why a vacuum pump might fail to extract liquid. Let's take a look at these eight possibilities:

1. No liquid has been added.

Solution: Refill the pump.

2. The suction pipe, discharge pipe, or pump flow path is blocked.

Solution: Remove any obstructions.
3. Incomplete purging of gas from the suction pipe or pump

Solution: Inspect the suction pipe and purge the gas completely.

4. Suction head exceeds the allowable range

Solution: Reinstall the pump to the allowable suction head.

5. Discharge pipe is too narrow, resulting in excessive pipe loss.

Solution: Replace with a suitable discharge pipe.
6. Using a pump with a head exceeding the design head

Solution: Select a different pump

7. Transporting hot or volatile media

Solution: Reduce the suction head or use reverse-flow installation

8. Reversed rotation direction

Solution: Correct the rotation direction
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