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

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    Structural Design, Operating Principle, and Engineering Applications of the GS-Type Energy-Saving Split-Casing Pump by Zoomlion Pump Industry in Changsha

    Publication Date:

    2026-03-21

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    The GS-series energy-saving split-case pump developed by Changsha Zoomlion Pump Industry has become the preferred equipment for liquid-handling applications across various industries, thanks to its unique split-case design, outstanding energy-efficiency performance, and broad adaptability to diverse operating conditions. In this article, the original manufacturer of the split-case pump Changsha Zoomlion Pump Industry , we will take a systematic approach by examining two core technical dimensions—structural characteristics and operating principles—and, in conjunction with real-world engineering application cases, thoroughly deconstruct our company’s production. GS-type energy-saving split-case pump Its structure, operating principles, and engineering applications will provide you with a thorough understanding of its technical advantages and core value, serving as a professional reference for industry selection and implementation.

     

    Central Open Pump

     

    I. Structural Design and Technical Characteristics

    The GS-series energy-efficient split-case pump features a horizontally split pump casing along the axis, connected via upper and lower flanges to enable quick disassembly and maintenance. Key components include: Pump Casing: a double-volute design that optimizes hydraulic losses and is suited for high-flow applications; Impeller: available in single-stage or multi-stage configurations, with closed-type impellers to minimize volumetric losses; Shaft System: supported by rolling bearings to ensure stable high-speed rotation; Sealing System: dual-face mechanical seals with a leakage rate of ≤3 mL/h (compliant with GB/T 3216). In addition, the pump can be configured in a vertical arrangement based on site-specific installation conditions, meeting the complex requirements of diverse industries and operating conditions.

     

    Structural Diagram of GS-Type Energy-Saving Split-Case Pump
    Vertical Split-Case Pump Structural Diagram

     

     

    II. Operating Principle and Performance Parameters

    Based on the principles of centrifugal hydraulics, when the motor drives the impeller to rotate, the blades propel the liquid radially outward, creating a high-pressure flow discharge. The key performance parameters are as follows: flow rate range: Q = 100–20,000 m³/h (single-stage); head range: H = 10–265 m (single-stage); efficiency range: η = 75%–93% (in accordance with ISO 9906).

     

    III. Typical Application Scenarios

    (1) Industrial Cooling Circulation System: The GS-type energy-saving, mid-open pump from Changsha Zoomlion Pump Industry can deliver cooling water in a closed loop at a flow rate of 5,000 m³/h, with temperature differential fluctuations no greater than 2°C, thereby ensuring optimal heat-exchange efficiency for the equipment.

    (2) Agricultural irrigation systems are designed to meet head requirements of 200–500 meters, with individual pumps capable of lifting up to 100,000 cubic meters of water per day, and are compatible with automated control systems for large-scale irrigation districts. (3) In municipal water supply systems, when pressurizing a DN1000 pipeline network, the system can deliver a stable output of 1.6 MPa, thereby meeting peak urban water demand.

    (4) In the wastewater treatment sector, a anti-entanglement impeller design is employed, suitable for lifting wastewater with a COD of ≤500 mg/L, achieving a flow passage efficiency of over 95%.

     

    IV. Directions for Technical Optimization

    Changsha Zoomlion Pump Industry has optimized blade profiles through CFD flow-field simulation, reducing the NPSH margin by 0.5 to 1.2 meters and enhancing adaptability to low-cavitation operating conditions. Looking ahead, the company will integrate digital twin technology to enable remote fault prediction and intelligent speed control, thereby meeting the demands of complex operating conditions.

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