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

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    Self-balancing multistage centrifugal pump API (BB4)
    Self-balancing multistage centrifugal pump API (BB4)
    Self-balancing multistage centrifugal pump API (BB4)
    Self-balancing multistage centrifugal pump API (BB4)
    Self-balancing multistage centrifugal pump API (BB4)
    Self-balancing multistage centrifugal pump API (BB4)
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    • Self-balancing multistage centrifugal pump API (BB4)
    • Self-balancing multistage centrifugal pump API (BB4)
    • Self-balancing multistage centrifugal pump API (BB4)
    • Self-balancing multistage centrifugal pump API (BB4)
    • Self-balancing multistage centrifugal pump API (BB4)
    • Self-balancing multistage centrifugal pump API (BB4)

    Category:

    API610 Series Chemical Pumps

    Keywords:

    Pump

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    Self-balancing multistage centrifugal pump API (BB4)

    Flow: 3.6-1345m³/h

    Lifting height: 72-1795m

    Pump weight: 160-6260kg

    Motor power: 5.9-4500kw

    NPSH margin: 2.0-7.0m

    Price: 3.08-495,000

     

    The self-balancing multistage high-pressure centrifugal oil pump type DYP is used to transport oils and petroleum products that do not contain solid particles, with a temperature below 80°C and a viscosity below 120 centistokes.

    +86 0731-88192288

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    info@cipump.com

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    Product Description Product Specifications Why Choose Us? FAQ

    Product summary

    As one of the recognized domestic manufacturers of multistage centrifugal pumps, to actively respond to the national call for energy saving and sustainable development, our company, after studying and adopting advanced technologies from similar foreign products and combining years of pump design experience, produces an efficient and energy-saving series of API self-balancing multistage centrifugal pumps (BB4). This series of multistage pumps uses a state-recommended hydraulic model, developed according to API610 standards, with advantages such as high efficiency and low energy consumption, wide performance range, reasonable structure, good cavitation resistance, safe and stable operation, low noise, few wear parts, and easy installation and maintenance, positioning it at the technological forefront of the industry.

    The API (BB4) self-balancing multistage centrifugal pump, as an efficient and energy-saving multistage pump, is a specific product within the self-balancing multistage pump series. It features a secure sealing design; depending on pressure and structure, the pump casing uses metal-to-metal hard sealing or O-ring sealing, with advantages of uniform flow, simple structure, wide flow and head range, and easy maintenance. It is widely used in petrochemicals, oilfield surface engineering, and crude oil water injection. The DYP type self-balancing multistage pump innovates the traditional structure of multistage centrifugal pumps by eliminating the axial force balance device of common multistage pumps and using symmetrical impeller arrangement to mutually cancel axial forces, effectively solving axial displacement. During operation, there is no efficiency loss caused by balance disc friction or reflux, increasing efficiency by 3-12% compared to similar common multistage pumps. Additionally, it completely eliminates failures such as wear or blockage of the balance disc and seat due to balance device failure, significantly extending pump life. Years of user experience show that our self-balancing multistage pumps have higher reliability and efficiency than traditional multistage pumps, with a failure-free operating time more than three times longer, effectively extending service life, saving production costs, and significantly reducing operation and maintenance costs. The DYP type self-balancing multistage pump is the main product for transporting oils and petroleum substances within the series, classified as a high-pressure multistage centrifugal oil pump, and is a substitute product for traditional DY type multistage pumps with balance discs or drums.

     

           Image 1   Application scope of the API (BB4) self-balancing multistage centrifugal pump

    Suitable for transporting oils and petroleum products without solid particles, with temperature below 80℃ and viscosity less than 120 cSt.

     

           Image 1   Description of the structure of the API (BB4) self-balancing multistage centrifugal pump

    The API (BB4) self-balancing multistage centrifugal pump has support at both ends, the casing is segmented, and the pump transmission is connected to the motor via a pin-type elastic coupling. Pump rotation direction: viewed from the drive end, the pump rotates clockwise.


     

    Anatomical diagram of the self-balancing multistage pump structure
     
     
    Structural diagram of the self-balancing multistage pump
    Structure of the parts of the self-balancing multistage pump
     

    1. Static part

    Mainly composed of the suction section (water inlet), middle section, discharge section (water outlet), guide vanes, secondary water inlet section, packing body (rear cover), and bearing body, all connected with tension bolts forming a unit. From the coupling end, the pump inlet is oriented horizontally to the right and the outlet vertically upwards.

    2. Rotating part

    Mainly composed of shaft, impeller, shaft choke components, bearings, and sleeves.

    3. Pump sealing

    3.1 The static joint surfaces between the suction section, middle section, discharge section, and secondary water inlet section are sealed with sealing adhesive or molybdenum disulfide.

    3.2 Choke sealing is used between the pump stages.

    3.3 Shaft seals on both sides of the pump use soft packing.

    3.4 A water retention ring is used to prevent water from entering the bearings.

    4. Bearing part

    The complete pump rotor is supported by a cylindrical roller bearing at the drive end according to GB/T283-94, and an angular contact ball bearing at the opposite end according to GB/T292-94. Bearings are lubricated with mechanical oil CD30 or CD40 added to the bearing body up to the center of the oil sight glass. Due to the use of the angular contact ball bearing GB/T292-94, the assembled rotor has no axial displacement.

     

           Image 1   Operating principle of the API (BB4) self-balancing multistage centrifugal pump

    　　The pump shaft, driven by the motor, rotates the impeller, performing work on the liquid and increasing its rotational energy at high speed, so that the required amount of liquid passes successively from the suction tank through the pump inlet section, direct impeller, direct guide vanes, middle section, horizontal outlet, transition tube, secondary inlet section, reverse impeller, reverse guide vanes, to the vertical outlet, and then discharges to the demand point.

     

         

           Image 1   10 major advantages of the self-balancing multistage pump VS traditional multistage pump

     

    1. New structure: the self-balancing multistage pump has rotating components with symmetrically arranged impellers, so that the axial forces generated by the direct and reverse impeller groups cancel each other out, eliminating the balance disk device which has small gaps, high pressure drop, easy erosion, wear, and failures, surpassing the traditional structure of multistage pumps;

    2. New technology: the self-balancing multistage pump features exclusive throttling and pressure reduction devices, and a balance device on odd stages that also acts as an auxiliary support;

    3. High energy efficiency: The self-balancing multistage pump uses an advanced hydraulic model that solves the wear and axial pulsation caused by the balance disk, always maintaining excellent alignment between the impeller and the guide. During prolonged use, it prevents the significant efficiency decrease caused by wear of the balance disk and forward displacement of rotor components in common multistage pumps, in addition to eliminating balance water leakage, reducing volumetric loss, generally improving the pump's operational efficiency and reducing shaft power, with an average efficiency 3%-12% higher than common multistage pumps.

    4. High reliability: The self-balancing multistage pump uses a self-balancing system that basically cancels the axial force load generated during pump operation, minimizing rotor wear and system interference. The small residual axial force is supported by the thrust bearing, keeping the pump shaft always in tension, with a uniform load distribution and a significant reduction of peak stress compared to the original structure, which improves the rotor's stiffness and critical speed, notably increasing the rotor's operational stability and reliability.

    5. High stability: The self-balancing multistage pump, through the excellent symmetrical combination of the impeller and guide, as well as appropriate clearance and a wide axial throttling design, maintains high stability and operational efficiency even after prolonged operation.

    6. Good cavitation performance: The self-balancing multistage pump uses an optimized hydraulic model and structural design, with a double suction structure in the first impeller stage, along with precise casting and wear-resistant materials, giving it good cavitation performance. The machine operates stably and with low noise, without the user needing to install a preliminary pump or raise the inlet tank height.

    7. High mechanical seal reliability: Because the rotor components of the self-balancing multistage pump have no axial displacement during start and stop, and no axial pulsation during operation, the problem of low mechanical seal reliability that has always affected multistage pumps has been overcome.

    8. Easy maintenance: The self-balancing multistage pump uses a three-dimensional design, with rotor components machined by numerical control, strictly ensuring the dimensions and precision of each part. This allows for quick assembly and disassembly, and replacement of seals and bearings without dismantling the pump body or the inlet and outlet pipes. General technical personnel can complete the work by following the assembly diagram's order and requirements, completely avoiding the need for specialized personnel to adjust and position axial displacement, providing great convenience to the user.

    9. Low maintenance rate: The self-balancing multistage pump uses precise casting, reducing wear parts and the frequency of disassembly and repair, prolonging the product's service life and largely avoiding a series of problems caused by frequent disassemblies, reducing maintenance costs.

    10. High adaptability: The self-balancing multistage pump uses an advanced combined modular design, with local components tested by intensive use and prolonged operation. The parts have high interchangeability, eliminating the small-gap balance disk device, better adapting to media with more severe properties than traditional structure multistage pumps.

          

     

           Image 1   Cost analysis chart of self-balancing multistage pump VS traditional multistage pump

    Cost analysis of the self-balancing multistage pump and the traditional multistage pump

    Product parameters

    Meaning of the API self-balancing multistage centrifugal pump model (BB4)

     

    Performance parameters of the API self-balancing multistage centrifugal pump (BB4)

     

    DY6-25P

    DY6-50P

    DY6-80P

    DY12-25P

    DY12-50P

    DY12-80P

    DY25-30P

    DY25-50P

    DY25-80P

    DY46-30P

    DY46-50P

    DY46-80P

    DY65-80P

    DY85-45P

    DY85-67P

    DY85-80P

    DY85-150P

    DY100-55P

    DY120-50P

    DY120-67P

    DY120-80P

    DY120-100P

    DY150-30P

    DY150-50P

    DY150-80P

    DY150-100P

    DY150-130P

    DY155-30P

    DY155-67P

    DY200-50P

    DY200-80P

    DY200-100P

    DY200-150P

    DY280-43P

    DY280-65P

    DY280-95P

    DY280-100P

    DY300-45P

    DY300-65P

    DY360-40P

    DY360-60P

    DY360-95P

    DY420-95P

    DY450-40P

    DY450-60P

    DY450-95P

    DY500-57P

    DY550-40P

    DY550-50P

    DY550-95P

    DY580-60P

    DY580-100P

    DY600-60P

    DY600-85P

    DY650-80P

    DY650-100P

    DY720-60P

    DY720-80P

    DY720-100P

    DY800-80P

    DY850-100P

    DY900-60P

    DY1100-85P

    200DY43P

    		 

    For more parameters of the API self-balancing multistage centrifugal pump (BB4), please visit Water pump selection Download the intelligent selection software on the page or call: 0731-88192288 for more information.

    Changsha Zhonglian Pump Industry Co., Ltd.

    Why Choose Us?

    Changsha Zhonglian Pump Industry Co., Ltd. was established in 1989, following the reform of the Changsha Water Pump Factory. It is a national high-tech comprehensive enterprise integrating design, research and development, manufacturing, and service. The company was listed on the Hunan Provincial Stock Exchange on December 31, 2019, with the abbreviated name "Zhonglian Pump Industry" and stock code: 600275HN. It is currently a key enterprise in China's centrifugal pump industry and one of the leading domestic manufacturers of multi-stage pumps, headquartered in Changsha, Hunan, a historical and cultural city in China.

    Changsha Zhonglian Pump Industry Co., Ltd.
    Changsha Zhonglian Pump Industry Co., Ltd.

    FAQ

    Q

    What products do you mainly produce?

    A

    Zoomlion Pump Industry manufactures various large industrial centrifugal pumps. The main products include: self-balancing multistage pumps, multistage centrifugal pumps, single-stage centrifugal pumps, split-case pumps, chemical pumps, submersible pumps, pipeline pumps, long-shaft pumps, condenser pumps, and more.

    Q

    Can you help me choose a model?

    A

    Of course! If the water pump model is not selected accurately, it can cause significant problems. After you take it back, it might be either too small to meet the usage requirements or too large, resulting in higher electricity and fuel costs, increasing the operating expenses.

    Q

    Why is the price quotation so slow?

    A

    Because centrifugal pumps are non-standard custom products with many models and a wide price range. Even for the same model, the price varies greatly depending on the materials and configurations used. Taking the most common pump accessory—the impeller—as an example, the price of a stainless steel impeller is several times that of a cast iron impeller. Therefore, we need to clearly confirm the relevant information to provide you with an accurate price. Normally, if you provide comprehensive information, we can quote within 5 minutes.

    Q

    What information should I provide when I need a quote?

    A

    Usually, if you want to get an accurate quote, it is recommended that you provide us with the following information: pump flow rate, head, on-site operating voltage, frequency, temperature of the conveyed liquid, pH value, solid particle content, on-site installation conditions (horizontal or vertical installation), and other related details. If you are not very familiar with these, it’s okay; our sales manager will assist you in determining them.

    Q

    Do you have centrifugal pumps in stock?

    A

    There are many models and configurations of centrifugal pumps. Except for a small number of commonly used standard models that are in stock, the vast majority of models and configurations are not stocked and are customized products. We need to first select the pump based on your site conditions such as flow rate, head, medium temperature, pH value, and installation conditions. After determining the pump model and configuration, we can then place an order with the workshop for production.

    Q

    What is your usual delivery time?

    A

    Models in stock can be shipped by the next day at the latest. Others are custom-made, and depending on the product size and specific project conditions, the delivery time is generally between 7-90 days. Please consult our sales manager for details: 0731-88632200 。

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