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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    Causes of Unstable Water Pressure in Horizontal Multistage Centrifugal Pumps and Corresponding Solutions

    Causes of Unstable Water Pressure in Horizontal Multistage Centrifugal Pumps and Corresponding Solutions

    During operation, unstable water pressure in horizontal multistage centrifugal pumps not only significantly reduces the overall system efficiency but can also trigger a cascade of secondary failures, such as equipment vibration and pipeline leaks, thereby jeopardizing the stable operation of the entire system. To address this critical issue, Changsha Zhonglian Pump Industry, a leading manufacturer of centrifugal pumps, will analyze the root causes of unstable water pressure in horizontal multistage centrifugal pumps from two perspectives—fault diagnosis and system optimization—and provide corresponding solutions for reference by end-user organizations.

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    2026-03

    Solution for Oil Leakage in Multistage Centrifugal Pumps (Technical Specification Version)

    Solution for Oil Leakage in Multistage Centrifugal Pumps (Technical Specification Version)

    As a commonly used general-purpose fluid-handling machine, multistage centrifugal pumps inevitably encounter various operational issues in practice. Among these, oil leakage—though not typically highly hazardous—can nonetheless affect both pump performance and service life. Prolonged oil leakage degrades pump performance and shortens its service life. To address this issue, Changsha Zhonglian Pump Industry, a leading manufacturer of centrifugal pumps with many years of technical expertise, offers solutions for oil-leakage problems in multistage centrifugal pumps, provided here for reference only.

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    2026-03

    Technical Solution to Impurity Issues in the Packing Chambers of Multistage Centrifugal Pumps

    Technical Solution to Impurity Issues in the Packing Chambers of Multistage Centrifugal Pumps

    Multistage centrifugal pumps can be equipped with either packing seals or mechanical seals, depending on the specific operating conditions. When handling particle-laden fluids, packing seals are prone to deposit buildup in the stuffing box area. In this paper, Changsha Zhonglian Pump Industry, a manufacturer of centrifugal pumps, conducts a systematic analysis—from both fluid-dynamics and mechanical-design perspectives—of the causes of impurity accumulation between the packing elements in multistage centrifugal pumps and proposes corresponding solutions for reference by end-users.

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    2026-03

    Causes of Unstable Rotational Speed in Multistage Centrifugal Pumps and Corresponding Solutions

    Causes of Unstable Rotational Speed in Multistage Centrifugal Pumps and Corresponding Solutions

    Multistage centrifugal pumps serve as core equipment for fluid conveyance in industrial, agricultural, and municipal applications, and their speed stability directly impacts system operational efficiency and product quality. When speed fluctuations occur in such pumps, a systematic diagnosis must be conducted across electrical, mechanical, fluid, control, and environmental factors. In this paper, Changsha Zhonglian Pump Industry, a manufacturer of centrifugal pumps, draws on its technical experience to analyze the typical causes of speed instability in multistage centrifugal pumps and to propose corresponding solutions, providing a reference for end-user organizations.

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    27

    2026-03

    Troubleshooting and Solutions for Difficult Startup of High-Efficiency, Energy-Saving Multistage Pumps

    Troubleshooting and Solutions for Difficult Startup of High-Efficiency, Energy-Saving Multistage Pumps

    Multistage centrifugal pumps play a critical role in fluid transportation in industrial production; their starting difficulties typically involve two key technical dimensions: system-level parameter matching and condition monitoring of core components. To address such failures, a systematic troubleshooting procedure must be established, with analysis conducted across three levels: power input, fluid characteristics, and mechanical structure. In this paper, Changsha Zhonglian Pump Industry, a manufacturer of centrifugal pumps, explores the diagnosis and solutions for starting difficulties in high-efficiency, energy-saving multistage pumps from five perspectives, and also provides maintenance recommendations for reference by user organizations.

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    2026-03

    Diagnosis of Negative Pressure Issues and System Solutions for D-Type Horizontal Multistage Centrifugal Pumps

    Diagnosis of Negative Pressure Issues and System Solutions for D-Type Horizontal Multistage Centrifugal Pumps

    During operation, a D-type horizontal multistage centrifugal pump may experience negative pressure at the inlet, typically defined as an inlet pressure lower than the ambient atmospheric pressure. This condition can lead to cavitation, flow fluctuations, and other operational issues. Below, Changsha Zhonglian Pump Industry, a leading manufacturer of centrifugal pumps, provides a technical analysis of the causes of negative-pressure problems in D-type horizontal multistage centrifugal pumps, along with comprehensive system-level solutions for reference by end-user organizations.

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    2026-03

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