Changsha Zoomlian Pump Co., Ltd. 长沙中联泵业股份有限公司

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    Causes of Water Leakage in Multistage Centrifugal Pumps and Prevention Methods

    Publication Date:

    2025-10-14

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    Multistage centrifugal pumps are divided into balance discs. Horizontal Multistage Centrifugal Pump With two distinct structures—self-balancing and multi-stage centrifugal pumps—these devices are widely used across various industrial sectors due to their outstanding performance, making them essential fluid-handling equipment capable of conveying liquids such as water, oil, and chemical solutions. However, during actual operation, leaks may occasionally occur, which not only impair the efficiency of the multi-stage centrifugal pump but can also lead to equipment damage and pose significant safety risks. In this article, we will explore insights from manufacturers of multi-stage centrifugal pumps. Changsha Zoomlion Pump Industry We will thoroughly analyze the main causes of water leakage in horizontal multistage centrifugal pumps and propose corresponding preventive and corrective measures.

     

    Self-balancing multistage pump

     

    I. Main Causes of Water Leakage in Multistage Centrifugal Pumps

     

    1. Mechanical Seal Issues:

    Mechanical seals are one of the critical components of pumps, and their quality directly affects the pump's performance and service life. If a mechanical seal is damaged or improperly installed, it can easily lead to water leakage from the pump casing. Additionally, wear, deformation, or cracks on the sealing surfaces can also trigger leakage issues.

     

    2. Pump Body Material and Casting Defects:

    Poor pump material quality, casting defects, or corrosion and wear can all lead to leaks in the pump body, resulting in water leakage. Additionally, if the pipe connections are loose or improperly sealed, water may seep out from these joints as well.

     

    3. Shaft seal and stuffing box issues:

    The shaft seals and stuffing boxes of multistage pumps are common areas where leaks can occur. If the shaft seal design is inadequate, or if the packing has aged or suffered severe wear, water will inevitably seep out from these components.

     

    4. Improper operation and maintenance:

    Inappropriate operation and maintenance can also lead to leaks in multistage pumps. For instance, failing to fully prime the pump with liquid before starting, operating under excessive load for extended periods, or delaying the replacement of worn-out components can all damage the pump and trigger leakage issues.

     

    II. Prevention and Mitigation Measures

     

    Based on the reasons mentioned above, we can take the following specific measures to prevent and address multi-stage pump leakage issues:

     

    1. Regularly inspect mechanical seals:

    Regularly inspect the condition of mechanical seals, shaft seals, and packing glands, and replace them promptly if wear or aging is detected. Ensuring these critical components remain in good condition can effectively prevent water leakage issues from occurring.

     

    2. Ensure the quality of the pump body and pipelines:

    Ensure that the pump body and piping are made of high-quality materials, inspect the casting quality, and repair or replace any severely corroded areas. High-quality materials and superior manufacturing processes are the foundation for preventing leaks.

     

    3. Check the pipe connections:

    Regularly inspect pipe connections to ensure they are securely tightened and free of leaks. Any loose or poorly sealed connection points should be repaired immediately to prevent water leakage.

     

    4. Standard Operating Procedures:

    Operate and start up strictly according to the operating procedures, and avoid running under overload conditions. Proper operational habits not only extend the lifespan of equipment but also reduce the likelihood of failures.

     

    5. Regular maintenance and upkeep:

    Regularly maintain the pump and promptly replace worn-out components. Through routine maintenance, potential issues can be identified early and addressed in a timely manner, ensuring the pump operates smoothly and reliably.

     

    The issue of water leakage in horizontal multistage centrifugal pumps involves multiple aspects, requiring us to analyze and address it from various angles—such as mechanical seals, the pump body and piping, shaft seals and stuffing boxes, as well as operational maintenance. Only by identifying the root cause of the problem and implementing effective measures can we ensure the smooth operation of the multistage pump and extend its service life.

     

    Mastering this knowledge will not only help you better maintain your existing equipment but also provide guidance for selecting and installing new ones. If you have any questions about horizontal multistage centrifugal pumps or need further assistance, please don’t hesitate to contact us: 15616442288 (WeChat with the same number)—we look forward to providing you with professional support and services.

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