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

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    Sharing Development Opportunities, Zoomlion Pump Makes Appearance at China-Africa Economic and Trade Expo

    2025-06-18

    Sharing Development Opportunities, Zoomlion Pump Makes Appearance at China-Africa Economic and Trade Expo

    The year 2025 marks the 25th anniversary of the Forum on China-Africa Cooperation (FOCAC) and is also the inaugural year for implementing the outcomes of the 2024 FOCAC Beijing Summit. This year commemorates the 25th anniversary of FOCAC, under whose guidance China-Africa relations have achieved leapfrog development. China has established strategic partnerships with all 53 African countries with diplomatic ties, trade volume between China and Africa has increased nearly 30 times, and Chinese investment in Africa has grown nearly 100 times, bringing tangible benefits to the peoples of China and Africa.

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    What are the reasons for unstable flow in a center-open, double-suction pump?

    What are the reasons for unstable flow in a center-open, double-suction pump?

    The water flow from the pump fluctuates unpredictably—sometimes large, sometimes small—and the pressure gauge needle jumps frequently. This instability in the flow rate of a double-suction pump with a mid-open design directly affects the accuracy of fluid delivery and poses hidden risks to the production process. To help users of double-suction pumps identify reliable causes of these issues, Changsha Zhonglian Pump Industry—the manufacturer of such pumps—has, based on the structural characteristics of mid-open double-suction pumps (including the double-suction impeller and mid-open pump casing) and its frontline operation and maintenance experience, compiled a list of five common causes of unstable flow rates in mid-open double-suction pumps, along with targeted troubleshooting methods for reference by user organizations.

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    2026-01

    Causes of Air Ingress Faults in Multi-stage Centrifugal Pumps and Preventive Measures

    Causes of Air Ingress Faults in Multi-stage Centrifugal Pumps and Preventive Measures

    As a core piece of equipment in fields such as hydraulic conveyance, power plant water supply and drainage, and chemical fluid transfer, multistage centrifugal pumps are prone to air intake during operation. If this phenomenon occurs frequently, it not only leads to a decline in pump head and efficiency—potentially reducing efficiency by more than 30%—but can also trigger a cascade of secondary failures, including cavitation and impeller damage. In severe cases, it may even cause the equipment to shut down completely. Therefore, accurately identifying the root causes of air intake and implementing scientific preventive measures are crucial for ensuring the stable and efficient operation of multistage centrifugal pump units. In this article, Changsha Zhonglian Pump Industry, a manufacturer of centrifugal pumps, will share the causes of air intake failures in multistage centrifugal pumps along with practical prevention and mitigation strategies, providing valuable reference for user organizations’ operations and maintenance teams.

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    23

    2026-01

    Causes of Leakage in High-Flow, High-Head Multistage Pumps and Prevention Methods

    Causes of Leakage in High-Flow, High-Head Multistage Pumps and Prevention Methods

    Leakage faults in multistage pumps not only lead to waste of media and increased energy consumption, but in severe cases can even cause equipment shutdowns and safety incidents. Therefore, accurately identifying the root cause of leaks and implementing targeted preventive measures are crucial for ensuring the long-term reliable operation of pump units. In this article, technical engineers from Changsha Zhonglian Pump Industry, a manufacturer of multistage pumps, will share the causes of leakage in high-flow, high-head multistage pumps as well as preventive measures, for reference by user organizations.

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    22

    2026-01

    Analysis of the Multi-Stage Centrifugal Pump Monitoring and Protection System: Core Components, Operating Principles, and Industrial Value

    Analysis of the Multi-Stage Centrifugal Pump Monitoring and Protection System: Core Components, Operating Principles, and Industrial Value

    As a critical core component in fields such as industrial fluid conveyance, municipal water supply, and hydraulic engineering, multi-stage centrifugal pumps directly determine the safety and economic efficiency of production processes through their continuous and stable operation. The intelligent protection system—comprising monitoring and protective accessories—employs a closed-loop logic featuring “sensor data acquisition, control system analysis, decision-making, and actuator precision response” to achieve real-time monitoring and control of pump units and conveying systems. This system not only reduces equipment failure rates by more than 40% and extends service life but also optimizes system operational efficiency and lowers long-term maintenance costs, serving as an essential technological support for ensuring the continuity of industrial production. In this article, Changsha Zhonglian Pump Industry, a manufacturer of centrifugal pumps, will share insights into the core components, operating principles, and industrial value of multi-stage centrifugal pump monitoring and protection systems.

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    21

    2026-01

    Common Types, Characteristics, and Applications of Shaft Seals for Centrifugal Pumps

    Common Types, Characteristics, and Applications of Shaft Seals for Centrifugal Pumps

    Choosing the right shaft seal not only reduces maintenance frequency but also lowers energy consumption; on the other hand, selecting the wrong one can lead to frequent equipment failures. Below, Changsha Zhonglian Pump Industry, a manufacturer of centrifugal pumps, will break down for you—from a professional perspective—the four most commonly used types of shaft seals for centrifugal pumps, along with their respective features and suitable application scenarios, helping you quickly identify the right sealing solution for your needs.

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    20

    2026-01

    What technical parameters of the pump must be provided by the purchaser when buying a pump?

    What technical parameters of the pump must be provided by the purchaser when buying a pump?

    When buying a water pump, do you immediately say, “I need a 22-kW pump—give me a quote”? Many customers think that specifying the motor power is sufficient, yet they’re completely clueless about the essential parameters that must be provided for proper pump selection—namely, flow rate and head. As a result, the pump they end up choosing either fails to deliver adequate performance, consumes excessive energy, or even breaks down within just a few days of use. In fact, motor power is merely the “output capacity” of the pump; what truly determines the right pump model are the core operating parameters. Without these critical parameters, even the most precisely calculated power rating won’t lead to the right pump choice.

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    2026-01

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