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

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    Multistage mining pump with double suction and medium opening type MDK
    Multistage mining pump with double suction and medium opening type MDK
    Multistage mining pump with double suction and medium opening type MDK
    Multistage mining pump with double suction and medium opening type MDK
    Multistage mining pump with double suction and medium opening type MDK
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    • Multistage mining pump with double suction and medium opening type MDK
    • Multistage mining pump with double suction and medium opening type MDK
    • Multistage mining pump with double suction and medium opening type MDK
    • Multistage mining pump with double suction and medium opening type MDK
    • Multistage mining pump with double suction and medium opening type MDK

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    Mining Multistage Pump

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    Pump

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    Multistage mining pump with double suction and medium opening type MDK

    Flow: 23.4-1188m³/h

    Lift height: 100.5-360m

    Efficiency: 38%-86%

    Pump weight: 100-3000kg

    Motor power: 25-1600kw

    NPSH (Net Positive Suction Head): 2.0-14.3m

    Price: 81,500-1.19 million

     

    The DK type double suction and medium opening multistage centrifugal pump is a horizontal medium opening two-stage centrifugal pump, suitable for water supply and drainage in industry and cities, and can also be used for agricultural irrigation and drainage. It is used to transport clean water or liquids with physical and chemical properties similar to water, with a transported medium temperature from -20℃ to 80℃. The maximum allowed inlet pressure is 0.6MPa. Design features of the DK type double suction and medium opening multistage centrifugal pump: 1. High efficiency and energy saving through the use of an efficient hydraulic model, optimized channels, and structure,

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    Product Description Product Specifications Why Choose Us? FAQ

    Product description

    The MDK type medium opening double suction multistage pump is a horizontal medium opening two-stage centrifugal pump, suitable for large flow drainage of open-pit mines, industrial and urban water supply and drainage, and can also be used for agricultural irrigation and drainage. It is used for mine drainage, pumping neutral media with solid content not exceeding 1.5% (particle diameter less than 1.3 mm), temperature between 0 and 80 °C, medium density less than 1.02×10³ kg/m³, and other wastewater with similar physical and chemical properties. It is widely applicable in steel mills, mine drainage, mine rescue, wastewater transport, among others. This pump has a higher lift than the single-stage medium opening double suction centrifugal pump, meeting the needs of more mining environments. It is a mining pump suitable for wells with certain depth requiring large flow drainage.

    Changsha Zhonglian Pump Industry MDK type medium opening double suction multistage pump for mining

           Image 1 Design features of the MDK type medium opening double suction multistage pump

    　　1. High efficiency and energy saving

    　　It adopts an efficient hydraulic model, optimized channels and structure, simultaneously reducing hydraulic and volumetric losses, allowing the new DKS series of horizontal medium opening multistage centrifugal pumps to have high design and operational efficiency.

    　　2. Advanced design technology

    　　The hydraulic model design uses excellent hydraulic design software combined with advanced foreign hydraulic models. Through CFD technology, a flow field analysis is performed based on ternary flow theory and meshing techniques, improving pump efficiency by more than 5% compared to traditional methods. The pump body and shaft strength are verified by finite element analysis to ensure a reliable structure, stable and durable operation, and long service life.

    　　3. Optimized channel technology

    　　The optimized channels match the pump's operational performance, ensuring high efficiency and a wide efficient zone, facilitating compliance with different working conditions; additionally, they balance radial force, reduce impact vibrations during operation, making the pump operate more stably.

    　　4. High reliability

    　　The double-entry structure facilitates simple sealing and prevents leaks, making the sealing safer and more reliable; 
    All impellers are mounted on the shaft in a back-to-back configuration, fully balancing axial force during operation, allowing safe operation under heavy loads when transporting media; 
    The rotor part undergoes strict dynamic balance tests to eliminate imbalances, reduce vibrations, and ensure stable operation with low noise levels.

    　　5. Fully automatic monitoring system

    　　The medium opening multistage pump can be equipped with an automatic monitoring device as needed, which monitors vibrations of bearings, pump body, motor, and mechanical seal leaks, as well as the unit's operational efficiency. The automatic heating system allows safe operation in cold seasons. The entire monitoring system operates through an explosion-proof operation column system, allowing local and remote operation.

     

           Image 1 Structural description of the MDK type medium opening double suction multistage pump

     

     

    Structural diagram of medium opening double suction multistage centrifugal pump

     

    1. The cover and base of the MDK type medium opening double suction multistage pump are connected by bolts along the axial line on the horizontal medium opening surface. The two impellers are fixed on the shaft with sleeve nuts and thrust sleeves. To reduce liquid leakage from the pressure chamber to the suction compartment, sealing rings are installed at the impeller inlets, and the flow between impellers is separated by a plate.

    2. The shaft support of the MDK type medium opening double suction multistage pump uses hydraulic and sliding bearings. Except for models 100DK230 and 250DK240 which use light oil lubrication on the bearings, others use dry oil lubrication. The 250DK360 pump uses sliding bearings with forced light oil lubrication. The bearings support the rotor's radial force and, after the natural symmetrical balance of the impellers, also support the residual axial force.

    3. The shaft sealing of the MDK type medium opening double suction multistage pump is packing type. The packing box consists of the pump base and cover. In the high and low pressure boxes there are water seal rings. The packing is graphite and asbestos rope impregnated with oil, and the water seal is drawn from the suction stage. To reduce pressure in the high-pressure packing chamber, a balance tube component is installed that leads high-pressure liquid from the packing chamber to the suction chamber of the previous stage. When high sealing levels are required, mechanical seals can be chosen.

    4. At the highest part of the MDK type medium opening double suction multistage pump there is a small plugged hole, used to extract vacuum or inject water before starting the pump.

    5. The MDK type medium opening double suction multistage pump is directly coupled to the motor by an elastic coupling. From the drive side, the pump rotates clockwise.

     

     

    Production process

           

     

    Our company is a nationally recognized manufacturer of vertical multistage pumps, independently established after the restructuring of Zhonglian Pump Industry. We specialize in the development and manufacture of self-balancing multistage pumps, vertical multistage pumps, mining multistage pumps, and medium opening multistage centrifugal pumps. We have over 30 years of experience in research and manufacturing of multistage centrifugal pumps. Thanks to our strong technical capability, extensive production experience, comprehensive inspection methods, and a professional design and engineering team, we have become a key national high-tech enterprise in multistage pump equipment. All our multistage pumps are designed and optimized by computer, ensuring stable and reliable quality.

    Product parameters

     
           Image 1 Description of the multistage double-suction medium-split mining pump model type MDK

     

     

     

    Description of the multistage double-suction medium-split mining pump model type MDK

     

     

           Image 1 Performance and parameters of the multistage double-suction medium-split mining pump type MDK

     

    Spectrum of multistage double-suction medium-split centrifugal pump

    　

    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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