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

language
    language
    Products
    Professionalism forges quality, innovation creates value.
    Multistage centrifugal pump type DG
    Multistage centrifugal pump type DG
    Multistage centrifugal pump type DG
    Multistage centrifugal pump type DG
    Multistage centrifugal pump type DG
    Multistage centrifugal pump type DG
    +
    • Multistage centrifugal pump type DG
    • Multistage centrifugal pump type DG
    • Multistage centrifugal pump type DG
    • Multistage centrifugal pump type DG
    • Multistage centrifugal pump type DG
    • Multistage centrifugal pump type DG

    Category:

    Horizontal multistage centrifugal pump

    Keywords:

    Pump

    Share on

    Multistage centrifugal pump type DG

    Flow: 35-180m³/h

    Lift height: 409-1056m

    Efficiency: 43%-83%

    Pump weight: 77-1964kg

    Motor power: 4.5-4500kw

    NPSH (Net Positive Suction Head): 2.0-7.0m

    Price: 0.82-16.9 thousand

     

    Suitable for transporting clean water with medium temperature between -20℃ and 160℃ (medium pressure not exceeding 105℃), or non-corrosive liquids with physical-chemical properties similar to water. The pump inlet pressure should not exceed 0.59M (6kgf/cm2). Widely used in power plants, metallurgy, heating, and other sectors for boiler water supply, also suitable for unitary and main pipeline systems in units of various capacities in power plants.

    +86 0731-88192288

    Customer service hotline

    info@cipump.com

    Email

    Recommended
    Online Inquiry
    Product Description Product Specifications Why Choose Us? FAQ

    Product description

    The DG type multistage centrifugal pump complies with the JB/T1051-93 standard "Types and basic parameters of multistage centrifugal pumps for clean water," featuring high efficiency, wide performance range, safe and stable operation, low noise, long service life, and easy installation and maintenance. It is suitable for transporting clean water with a medium temperature from -20℃ to 160℃ (customizable for higher temperatures), or non-corrosive liquids with physical and chemical properties similar to clean water. It can also transport hot water, oils, corrosive or abrasive media by changing the materials of the flow parts, seal type, and adding cooling systems. It has multiple uses and is commonly used as a boiler circulation pump, boiler feed pump, or furnace water circulation pump in power plants, metallurgy, heating, and other sectors. The DG multistage pump, as a high-pressure boiler feed pump or other high-pressure use, is an efficient and energy-saving product specially designed for upgrading and modernizing new series of industrial steam boilers. It is suitable not only for medium and low-pressure boiler feed but also for high-lift water transportation in factories and cities.
     
    u=3319421062,3347160424&fm=26&fmt=auto
     

            Image 1 Structural features of the DG type horizontal multistage centrifugal pump    

    1. The DG multistage pump is a multi-stage, single-suction centrifugal pump with a casing that can be axially disassembled along the shaft line. The DG85-80×8 model pump has a suction inlet oriented vertically upward and an outlet also vertically upward, perpendicular to the shaft. From the motor side, the pump rotation direction is clockwise, although it can also be manufactured counterclockwise according to user needs, which must be specified when ordering.

    Structural diagram of the DG boiler feed pump

    　　2. The pump casing and cover form the impeller working chamber. The water inlet and outlet flanges have threaded holes for installing vacuum and pressure gauges, and the bottom of the casing has threaded holes for draining residual water. The impeller is single-suction and closed, with a balance disk that compensates for most of the axial force, plus a thrust bearing to support the small residual axial force. The bearing arrangement keeps the shaft in a stable tension rod state. Before assembly, the impeller must pass a strict static balance check to ensure stable operation. The pump shaft is supported by two Babbitt alloy sliding bearings, lubricated with light oil and mounted on the shaft support.

    　　3. Inside the casing, there is a sealing ring that improves the pump's volumetric efficiency and prevents high-pressure water backflow into the suction chamber, which would disturb the inlet flow and ensures suction performance. The shaft seal is generally a soft packing seal; during operation, a small amount of medium may enter the packing housing, and it can also be externally connected to cooling and lubrication water for sealing and cooling. According to user needs, the packing can be replaced by a mechanical seal.

    　　4. Bearing balance: The rotor of the DG type high-pressure boiler pump is supported by ball bearings at both ends of the shaft, lubricated with light oil and cooled with circulating water. The rotor's axial force is automatically balanced by a balance disk. The balance water returns to the suction section through a return pipe. The rotor of the DG type medium-pressure pump is supported by sliding bearings at both ends of the shaft, lubricated with light oil and cooled with circulating water. The rotor's axial force is balanced with a balance disk; between the balance chamber and the front section, there is a return pipe. The rotor is supported by sliding bearings at both ends of the shaft. The bearings have forced lubrication, the pump is equipped with an oil system, and the rotor's axial force is balanced with a balance disk. Additionally, it has a thrust bearing to support the residual axial force caused by changes in working conditions, and between the balance chamber and the suction pipe, there is a return pipe.

    　　5. Transmission: Medium and medium-high pressure multistage pumps are driven by a motor through an elastic coupling. From the transmission direction, the pump rotates clockwise. High-pressure pumps are also driven by a motor through an elastic coupling, and according to user needs, they can be equipped with toothed couplings, diaphragm couplings, or hydraulic couplings. The motor can be a small steam turbine or an electric motor. From the transmission direction, the pump rotates clockwise.

    On-site use of the boiler feed pump
    Production process

     

    Our company is a nationally recognized manufacturer of multistage centrifugal pumps, independently established after the restructuring of the former Zhonglian Pump Industry. We specialize in the development and manufacture of self-balancing multistage pumps, multistage boiler feed pumps, mining multistage pumps, and corrosion-resistant multistage pumps. We have over 30 years of experience in research and manufacturing of multistage pumps. Thanks to our strong technical capability, extensive production experience, comprehensive inspection methods, as well as a professional design and engineering team and technical production staff, we have become a key national high-tech enterprise in multistage pump equipment. All our multistage water pumps are computer-designed and optimized, ensuring stable and reliable quality and good anti-cavitation performance. We invite you to visit our factory and discuss possible collaborations.

    Product Parameters

    Description of the DG type horizontal multistage centrifugal pump model

    Flow range: Q=100~580m3/h (DG high pressure)
    Q=35~180m3/h (medium pressure, sub-high pressure)
    Head range: H=740～2150m (high pressure)
    H=409~1056m (sub-high pressure)
    H=270～672m (medium pressure)
    Transport temperature: -20-205℃ (indicate if above 150℃)
    Suction pressure: 0-7.5MPa (indicate if above 0.5 MPa)
    Sealing type: packing seal, mechanical seal

     

    Parameters of the DG multistage pump model (these data are for reference only, please consult the actual order!)

     

    D/DG/DF/MD6-25

    D/DG/DF/MD6-50

    D/DG/DF/MD6-80

    D/DG/DF/MD12-25

    D/DG/DF/MD12-50

    D/DG/DF/MD12-80

    D/DG/DF/MD25-30

    D/DG/DF/MD25-50

    D/DG/DF/MD25-80

    D/DG/DF/MD46-30

    D/DG/DF/MD46-50

    D/DG/DF/MD46-80

    D/DG/DF/MD85-45

    D/DG/DF/MD85-67

    D/DG/DF/MD85-80

    D/DG/DF/MD85-100

    D/DG/DF/MD120-50

    D/DG/DF/MD120-100

    D/DG/DF/MD150-30

    D/DG/DF/MD150-50

    D/DG/DF/MD150-80

    D/DG/DF/MD150-100

    D/DG/DF/MD155-30

    D/DG/DF/MD155-67

    D/DG/DF/MD200-50

    D/DG/DF/MD200-100

    D/DG/DF/MD200-150

    D/DG/DF/MD210-70

    D/DG/DF/MD280-43

    D/DG/DF/MD280-65

    D/DG/DF/MD280-95

    D/DG/DF/MD280-100

    D/DG/DF/MD300-45

    D/DG/DF/MD360-40

    D/DG/DF/MD360-60

    D/DG/DF/MD360-95

    D/DG/DF/MD450-60

    D/DG/DF/MD450-95

    D/DG/DF/MD500-57

    D/DG/DF/MD550-50

    D/DG/DF/MD580-60

    D/DG/DF/MD640-80

    D/DG/DF/MD720-60

    D/DG/DF/MD1100-85

    For more performance parameters of the DG type sub-high pressure multistage boiler feed pump, download the intelligent selection software on the pump selection 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 。

    Recommended Products

    Online Inquiry

    Attention: Please leave your contact information, our professional staff will contact you as soon as possible!

    Inquire Now