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

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    API 610 BB3 Configuration KHP-Type Multistage Split-Case Pump
    API 610 BB3 Configuration KHP-Type Multistage Split-Case Pump

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    API 610 BB3 Configuration KHP-Type Multistage Split-Case Pump

    The KHP pump is a horizontal, mid-split, multistage pump developed by Changsha Zoomlion Pump Industry in accordance with the API 610 standard. Built upon an optimally selected hydraulic model and leveraging CFD fluid dynamics simulations and computer-aided design techniques, it represents a new generation of high-pressure multistage pumps that offer high efficiency, energy savings, robust durability, and ease of maintenance.

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    Project Introduction

    The KHP pump is a horizontal, mid-split, multistage pump developed by Changsha Zoomlion Pump Industry in accordance with the API 610 standard. Built upon an advanced hydraulic model and leveraging CFD fluid dynamics simulations and computer-aided design techniques, it represents a new generation of high-pressure multistage pumps, offering outstanding efficiency and energy savings, robust durability, and ease of maintenance.

     

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           KHP-type mid-open multistage pump (BB3 structure) Pumps are suitable for high-pressure applications in industries such as long-distance transportation of crude oil (or refined petroleum products), high-pressure water injection in oilfields, seawater desalination, transportation of chemical feedstocks (such as lean methanol), conveyance of ash water in coal chemical processes, handling of condensate in coal chemical operations, pumping of ammonium carbamate solutions, scale removal in the steel industry, hydraulic coal mining, and boiler feedwater supply.

     

    Product Features of the KHP-Type Mid-Open Multistage Pump (BB3 Configuration)

          

    Axially split pump casing—both the suction inlet and discharge outlet are located below the pump shaft line and perpendicular to it, facilitating installation and maintenance;

    Dual-vortex chamber design—balances hydraulic radial forces, extending the service life of bearings and mechanical seals;

    High efficiency—achieved through an advanced hydraulic model and a compact flow-path design;

    Symmetrical impeller arrangement—enables long-term balance of axial forces;

    Stringent balancing requirements—impellers undergo static balancing inspection, while rotor components undergo high-precision dynamic balancing inspection;

    Excellent cavitation resistance—the first-stage impeller is either a double-suction impeller or an impeller with superior cavitation performance;

    Reliable bearings—pump bearings utilize a combination of imported-brand bearings, which better balance the forces acting on the rotor;

    Installation near the centerline—enables the conveyance of higher-temperature liquids;

    Overloaded bolts—effectively prevent pump casing deformation and interstage leakage;
    Convenient monitoring—vibration and temperature measurement interfaces are provided on the bearing housing for online monitoring;

    High configuration—optimized material selection combined with all-stainless-steel rotor components, paired with a cartridge-type mechanical seal;
    Structural Configuration — API 610 BB3 Pump

     

    Structural Sectional View of the KHP-Type Mid-Open Multistage Pump (BB3 Configuration)

    This series of open-type multistage pumps is available in four structural configurations to meet the diverse requirements of different industries and operating conditions. The illustrations of the four configurations are shown below.

     

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    Product Advantages of the KHP-Type Mid-Open Multistage Pump (BB3 Configuration)

    1. High Efficiency: The double-suction design delivers high flow and high-pressure output, optimizing pump performance.

    2. Corrosion Resistance: The material is selected from a highly corrosion- and wear-resistant alloy to withstand harsh operating conditions.

    3. Stability: The pump’s design minimizes vibration and noise, enhancing operational stability and reliability.

    4. Convenient maintenance: The structural design facilitates maintenance and inspection, thereby reducing downtime and maintenance costs.

    5. Wide applicability: Capable of handling a variety of fluids, including corrosive, viscous, and solid-particulate-containing liquids.

    6. Pump Structure: This is a horizontal, double-end-supported, volute-type, single-shell, axially split (also known as horizontally split) multistage centrifugal pump, with the casing supported near its centerline. The pump casing consists of upper and lower sections connected by multiple bolts around the periphery, facilitating maintenance and inspection.

    7. Impeller Configuration: Depending on the suction conditions, the first-stage impeller can be configured as either a single-suction or double-suction design. The impellers are divided into two sets and separated by a central bushing or sealing element.

    8. Force Balance Design: Radial force balance in the pump is achieved through a double-volute design; axial force balance is realized by employing a double-suction impeller for the first stage combined with back-to-back arrangement of the remaining stages (or by using all single-suction impellers arranged back-to-back), thereby eliminating the need for an additional axial-force-balancing mechanism. The residual axial force is borne by the thrust bearing.

    9. Bearing Arrangement: Depending on the pump size (and load conditions), radial bearings may be either rolling-element bearings or lubricated bearings; thrust bearings may be back-to-back mounted angular-contact ball bearings or tilting-pad journal bearings. Lubrication methods may include dilute-oil self-lubrication, oil-mist lubrication, or pressurized-oil lubrication.

    10. Cooling Method: Depending on the specific operating conditions and pump size, the bearings may be cooled by finned natural air cooling, fan-assisted cooling, water-cooled jacket cooling, or coil cooling.

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