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MDP25 series

MDP25-50×（3-12）self balancing multi-stage pump

Product Introduction:Self balancing multi-stage centrifugal pump: Self balancing multi-stage pump is a high-efficiency high-pressure multi-stage centrifugal pump product developed in accordance with the API610 standard, in order to meet user needs and accelerate the development of high-pressure mult..
  • more efficient
  • Stable operation
  • Long lifespan
  • Source manufacturer
  • Fast delivery

  • Flow:

    25m³/h

  • Lift:

    150-600m

  • Power:

    22-110kw

  • Margin:

    2.7m

  • Efficiency:

    54%

  • Price:

    Customized quotation
    • Overview
    • Advantage
    • Sales
    • Characteristic



      Ten Advantages of Self balancing Multistage Centrifugal Pumps

      1.New structure

      The rotor components with symmetrical arrangement of impellers basically cancel out the axial thrust generated by the forward and reverse groups of impellers during operation,eliminating the need for small gaps,high pressure drops,easily eroded,easily worn,and easily malfunctioning balance disk devices to maintain axial force balance,breaking through the traditional structure of multi-stage pumps.

      2.New technology

      Unique throttling and pressure reducing devices,odd level balancing devices,and can also serve as auxiliary support.

      3.Efficient and energy-saving

      Adopting advanced hydraulic models and independently developed high-efficiency energy-saving products;Due to the absence of wear and axial pulsation from the balance plate on the pump rotor,the alignment between the impeller and the guide vanes is always in the best state,and there will be no significant decrease in efficiency with the wear of the balance plate and the forward movement of the rotor components in a typical multi-stage pump structure;And without the leakage of balanced water,the volume loss is reduced,which overall improves the operating efficiency of the pump and reduces shaft power,with an average efficiency increase of 2%to 3%compared to ordinary multi-stage pumps.

      4.High reliability

      The self balanced axial force load minimizes pump wear and system interference.A very small portion of the residual axial force is borne by the thrust bearing,which keeps the pump shaft in a tensile state and the stress state of the shaft uniform.The peak stress is greatly reduced compared to the prototype structure,thereby improving the rigidity and critical speed of the pump rotor,and significantly improving the smoothness and reliability of the pump rotor operation.

      5.High stability

      Through the optimal combination of symmetrical impellers and guide vanes,as well as reasonable fit gaps and wide axial throttling design,the pump can still maintain its high stability and operational efficiency after long-term operation.

      6.Good cavitation performance

      The optimized hydraulic model and structural design,special first stage impeller double suction structure,combined with precision casting and reliable wear-resistant materials,make the pump have good anti cavitation performance,stable operation of the entire machine,low noise,and users do not need to configure a front pump or increase the height of the water inlet tank.

      7.Mechanical seal strength reliability

      When the pump starts and stops,the rotor components do not move axially,and there is no axial pulsation during operation,overcoming the problem of poor reliability of the mechanical seal that has been plagued by multi-stage pumps.

      8.Convenient maintenance

      The rapid assembly and disassembly design allows the water pump to replace seals and bearings without disassembling the pump body and inlet and outlet pipelines.The pump does not have vulnerable components such as balance plates,saving time for major repairs and inspections.

      9.Low maintenance rate

      The use of silica sol precision casting technology reduces the number of vulnerable parts and maintenance disassembly,prolongs product life,and maximizes the avoidance of a series of problems caused by excessive disassembly,reducing maintenance costs.

      10.Strong applicability

      Advanced modular combination design,local components that have undergone extensive use and long-term testing,and components with high interchangeability.The small clearance balance disc device has been removed,making it more suitable for situations with worse media properties than traditional multi-stage pumps.
      Our company is a professional manufacturer of various types of water pumps and pump ships,occupying the market with its unique professional technology,providing users with satisfactory and qualified products,and implementing lifelong service is our service tenet.We will adhere to the principle of maintaining a minimum profit and provide you with good services in accordance with the IS09001 international quality management system.Therefore,our company hereby makes the following commitments:

      1.Our company organizes production and testing in accordance with national standards,industry standards,and technical conditions specified in the contract,and strictly operates in accordance with the ISO9001 quality assurance system to ensure that unqualified products do not leave the factory.

      2.Our company provides free technical consultation to users,provides design solutions according to their requirements,and actively cooperates with the owner and supervisor.After the equipment is put into operation,professional technical personnel will be dispatched to assist in on-site production management.

      3.If necessary during the installation period,our company can send professional technical personnel to supervise and cooperate on site to ensure the installation progress and quality.Our company provides free training of operators for users until they become proficient in their own operations,and provides users with relevant operating procedures and rules and regulations for free.

      4.Conduct acceptance assessment of equipment and operational indicators according to design standards and parameters,and be responsible for product performance monitoring.If the standards are not met,our company is responsible for rectification until they meet the standards.

      5.Our company's equipment warranty period is 12 months from the date when the equipment is installed and accepted,put into operation,and the owner issues a preliminary acceptance certificate,with lifelong maintenance.After the equipment is delivered for use through operation,if there is a quality issue with our equipment during the warranty period,we will respond within half an hour after receiving your written notice.We will send personnel to the site for maintenance and other after-sales services within 24 hours to ensure the normal operation of the unit.After the warranty period expires,our company only charges a certain cost for equipment maintenance and repair.

      6.Our company's products are all subject to the"three guarantees"policy,and during the"three guarantees"period,the products are indeed quality problems.We strictly fulfill the compensation responsibilities stipulated in the contract.And provide the certificate of conformity and product manual of this batch of products at the time of delivery.

      7.Based on the actual situation,our company guarantees to provide maintenance accessories and do a good job in maintenance services according to user requirements.We provide special tools and spare parts for users,and also implement the"three guarantees"for this batch of products.

      8.Our company conducts regular or irregular telephone follow-up visits(or on-site inspections)to listen to user opinions,exchange relevant experiences,and provide remote network guidance to improve and improve after-sales service.
      The ZPD mining self balancing multi-stage pump has reformed and innovated the traditional structural form,eliminating the axial force balance mechanism and balancing device of the multi-stage centrifugal pump.It has become the best updated product for D and DG multi-stage centrifugal pumps that use a balance plate or balance drum structure.The self balancing multi-stage pump mainly consists of the following parts:

      1.Impeller

      The impeller adopts a single suction,closed,and efficient impeller,which is divided into left and right rotating impellers,symmetrically arranged with the discharge section as the center.The impeller is keyed to the shaft.

      2.Suction and discharge sections

      Suction section:The impeller is symmetrically arranged back to back,with a segmented structure.According to the different suction directions,it is divided into axial suction(without bearing frame at the suction end)and side suction(with front bearing frame).The discharge section has two outlet flanges,where the flange on the side is connected to the flange on the suction section(non drive side)through a guide pipe component to achieve liquid flow transition between reverse impellers.The outlet flange facing upwards in the middle is the outlet of the pump.The transition of liquid flow between impellers in the same direction is achieved through guide vanes.

      3.Pump body mouth ring/impeller mouth ring

      Including suction section mouth ring,guide vane mouth ring,middle section mouth ring,pump body mouth ring and impeller mouth ring are all vulnerable parts and can be replaced;The pump body mouth ring and impeller mouth ring are fixed by using anti rotation pins and spot welding,or by using riding screws and riveting;All sealing ring materials are high wear-resistant and high hardness materials;

      4.Intermediate bearing sleeve and intermediate sleeve

      The intermediate shaft sleeve is installed between two adjacent opposing impellers and connected to the shaft through a key;The intermediate sleeve forms a small gap with the intermediate shaft sleeve,and there is a pressure difference between the opposing impellers on both sides of the gap,generating a certain axial force that points towards the driving side;All intermediate shaft sleeves and intermediate sleeve materials are high wear-resistant and high hardness materials:the intermediate sleeve is made of copper alloy material,and the intermediate shaft sleeve is made of hard alloy.The intermediate shaft sleeve and intermediate sleeve form a pair of sliding bearings,and the lubrication of the bearings is in the form of self-lubrication.

      5.Throttle shaft sleeve and throttle sleeve

      The throttling shaft sleeve is installed on the suction inlet side of the impeller on the non driving(high-pressure)side and connected to the shaft through a key;The throttle sleeve is installed on the suction section(non driving side),forming a small gap with the throttle shaft sleeve.The axial force generated by the pressure difference on both sides of the gap points towards the non driving side;The material of the throttle shaft sleeve and throttle sleeve is high wear resistance and high hardness material.

      6.Axis

      The shaft adopts a rigid shaft design.To facilitate installation and disassembly of the impeller and shaft sleeve,the surface of the shaft is chrome plated with 0.05-0.08mm.

      7.Bearings

      The bearings are angular contact ball bearings installed back to back,which withstand residual axial forces.
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