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

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    High-Temperature, High-Pressure Pump

    Publication Date:

    2025-09-05

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    Currently, high-temperature, high-pressure pumps are increasingly being used in fields such as petrochemicals, metallurgy, power generation, synthetic fibers, food processing, and mining. They are essential for equipment requiring high pressure accuracy or for experimental purposes, where they handle the conveyance of various media operating under extreme temperature and pressure conditions. Given the unique characteristics of the media being transported—namely, their high temperature and high pressure—strict requirements apply to the selection and design of these pumps. In particular, rigorous standards are imposed on the strength of flow-path components, sealing mechanisms, and overall structural design.

    Commonly used high-temperature, high-pressure pumps typically adopt a centrifugal pump design. However, traditional multistage centrifugal pumps are limited in both the pressure and temperature they can handle—usually operating at temperatures no higher than 80°C. Moreover, since some specialized industries transport corrosive liquids that contain solid particles, and the liquid temperatures sometimes even exceed 100°C, this places even greater demands on the pump's sealing mechanisms. As a professional manufacturer specializing in centrifugal pumps, Changsha Zhonglian Pump Industry successfully developed its seventh-generation self-balancing, high-temperature, and high-pressure dedicated pump in 2018—capable of handling temperatures ≥200°C and delivering head heights ≥1680 meters. The pump passed its initial test run flawlessly, and the company has already secured an initial order for eight units destined for export to Russia.

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    High-Temperature, High-Pressure Pump Models

    Changsha Zoomlion Pump Industry's self-balancing high-temperature and high-pressure pumps are designed to meet user needs and accelerate the advancement of high-pressure multistage pump technology, incorporating cutting-edge technologies from similar foreign products. Leveraging years of design expertise and guided by the API I610 standard, these highly efficient, high-pressure, and high-temperature multistage centrifugal pumps have established a leading position in the industry. They boast outstanding features such as exceptional energy efficiency, an extensive performance range, excellent cavitation resistance, reliable and smooth operation, low noise levels, minimal wear-and-tear components, and convenient installation and maintenance. These pumps can be customized by selecting different materials for flow passages, opting for various sealing configurations, or integrating additional cooling systems, making them ideal for handling hot water, oils, corrosive fluids, or even media containing abrasive particles. They are widely applicable across industries—including petroleum, chemical processing, fertilizer production—as well as in applications like high-pressure water-based cleaning and descaling in metallurgy, steel rolling mills, construction, shipbuilding, sugar refining, paper manufacturing, and chemical engineering. Additionally, they serve critical roles in industries such as oilfield water injection, boiler feedwater supply, hydraulic machinery as power sources, and sectors like food and pharmaceuticals where high-pressure fluid generation is essential.

    ZPD-type self-balancing high-temperature, high-pressure multistage clear water pump: Designed for conveying clear water or liquids with physicochemical properties similar to water—provided they are free of solid particles and have temperatures below 80°C. Ideal for use in mining operations, industrial facilities, and urban water supply and drainage projects.

    ZPDG-type self-balancing, high-temperature and high-pressure feedwater pump: Designed for conveying clear water or liquids with physicochemical properties similar to water—specifically those free of solid particles and operating at temperatures ranging from -20°C to 210°C. Ideal for medium-, low-, and high-pressure feedwater applications.

    ZPDF-type self-balancing high-temperature, high-pressure pump for chemical applications: Designed to convey corrosive liquids free of solid particles, with temperatures ranging from -20°C to 105°C.

    ZPDY-type self-balancing high-temperature, high-pressure oil pump: Designed for conveying oils and petroleum products that are free of solid particles, have temperatures ranging from -20°C to 105°C, and exhibit viscosities below 120 centistokes.

    ZMDP-type self-balancing, wear-resistant, multistage centrifugal pump for mining: Designed to handle medium-sized mine water and other similar wastewater containing up to 1.5% particulate matter with particle sizes ≤1.3mm, at temperatures ranging from -20°C to 80°C. The pump inlet can withstand pressures of less than 0.6 MPa.

    Characteristics of High-Temperature, High-Pressure Pumps

    The D, DG, DF, DY, and MD(P)-type high-efficiency self-balancing high-temperature and high-pressure pumps represent an innovative departure from the traditional multi-stage segmental centrifugal pump design. By eliminating the conventional axial force balancing mechanisms—such as balance discs or balance drums—these pumps offer a superior next-generation alternative to multi-stage centrifugal pumps of similar designs. Thanks to their unique self-balancing feature, these high-efficiency, multi-stage, high-temperature, and high-pressure pumps eliminate both disc friction losses caused by balance mechanisms and recirculation losses associated with balance systems. As a result, pump efficiency improves by 3–12% compared to conventional multi-stage pumps in the same category. Moreover, this design flawlessly addresses common issues like wear on the balance disc and its seat, as well as rotor seizure—all of which often arise due to failure of traditional balancing devices. Consequently, the pumps enjoy significantly extended service lives. In fact, these pumps can operate reliably for more than three times longer than standard models, dramatically reducing maintenance costs for users and lowering overall lifecycle maintenance expenses. Years of successful operation have consistently demonstrated that this product meets—and even surpasses—the advanced performance standards of comparable international counterparts.

    <1>New Structure: The rotor assembly features a symmetrically arranged impeller configuration, enabling the axial thrust generated by the forward and reverse impeller sets during operation to largely cancel each other out. As a result, there’s no need for a balance disc mechanism—known for its small clearance, high pressure drop, susceptibility to erosion, tendency to wear prematurely, and frequent failure risks—thereby breaking through the conventional structure of multistage pumps.

    <2>New Technology: The unique throttling and pressure-reducing devices, along with the odd-stage balancing mechanism, also serve as auxiliary support components.

    <3>High Efficiency and Energy Savings: Featuring an advanced hydraulic model, these are highly efficient, energy-saving products developed entirely in-house. Thanks to the elimination of wear on the balance disc and axial pulsations in the pump rotor, the impeller remains perfectly aligned with the diffuser vanes at all times—unlike conventional multistage pumps, where efficiency noticeably declines as the balance disc wears out and rotor components shift forward. Additionally, there’s no leakage of balancing water, significantly reducing volumetric losses and boosting overall pump efficiency. As a result, these pumps deliver an average efficiency improvement of 3% to 12% compared to standard multistage pumps, while also lowering shaft power consumption.

    <4>High Reliability: The symmetrical arrangement of the impeller ensures that the axial thrust generated during operation is largely balanced automatically, eliminating the need for a balance disc mechanism—known for its small clearance, high pressure drop, susceptibility to erosion, wear, and frequent failures. This design minimizes the adverse effects of axial force-induced wear and system disturbances. Any remaining axial force is absorbed by the thrust bearing, keeping the pump shaft consistently under tensile stress and ensuring an even distribution of axial loads. As a result, the peak stress levels are significantly reduced compared to the original design, enhancing both the rotor’s rigidity and critical speed. Consequently, the pump rotor operates more smoothly and reliably than ever before.

    <5>High Stability: Thanks to the excellent combination of a symmetrical impeller and diffuser, along with optimized clearance gaps and a generously designed axial throttling system, the pump maintains its exceptional stability and remarkably high operational efficiency even after prolonged use.

    <6>Excellent cavitation performance: Optimized hydraulic modeling and structural design, combined with a unique double-suction impeller configuration in the first stage, along with precision casting and robust, wear-resistant materials, ensure the pump delivers outstanding cavitation resistance. The entire unit operates smoothly with low noise levels, eliminating the need for users to install an additional booster pump or raise the height of the suction tank.

    <7> Exceptional Mechanical Seal Reliability: The rotor components experience no axial movement during pump startup and shutdown, and there are no axial pulsations during operation—effectively overcoming the longstanding challenge of poor mechanical seal reliability that has plagued multi-stage pumps.

    <8>Low Maintenance Rate: Utilizing precision casting reduces the number of vulnerable components and minimizes the frequency of maintenance disassembly and reassembly, thereby extending product lifespan. This approach also significantly prevents a range of issues caused by excessive handling, ultimately lowering maintenance costs.

    <9>Excellent Versatility: Featuring an advanced modular design with locally tested components that have undergone extensive use and long-term operational trials, the parts exhibit a high degree of interchangeability. The elimination of the small-clearance balance disc mechanism further enhances the pump's ability to handle media with more challenging properties compared to conventional multi-stage pumps.

    <10>Easy Maintenance: The quick assembly and disassembly design allows for the replacement of seals and bearings without removing the pump body or its inlet and outlet pipelines. Additionally, the pump no longer includes vulnerable components like balance discs, significantly reducing downtime during overhauls and inspections.

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