Multistage Centrifugal Pump For High Head

Multistage Centrifugal Pump for High Head​ is a centrifugal pump that connects two or more impellers in series on the same shaft. Each stage of the impeller increases the pressure of the medium once, and the total head is obtained by adding up the heads of all stages. Our product adopts a segmented single-shell structure - the suction section, middle section, and discharge section are fastened by tension bolts, with metal face hard seals. During maintenance, the rotor components can be withdrawn without disassembling the pipeline. Axial force is counteracted by balance discs or balance drums, and radial force is balanced by the symmetrical arrangement of double volutes or guide vanes. It operates smoothly, has low vibration, and has a long service life.

Multistage Centrifugal Pump for High Head is classified into four series based on the characteristics of the transported medium. When selecting the model, the series should be determined first, then the model:
D Series (Clear Water Type): It is used for transporting clear water or liquids with physical and chemical properties similar to clear water, with a solid content <1% and particles <0.1 mm, and the medium temperature ≤80℃. It is suitable for general high-pressure working conditions such as mine drainage, municipal water supply, agricultural irrigation, and high-rise water supply.
DG Series (Boiler Feed Water Type): For medium and low pressure DG, the medium temperature ≤105℃, and for high pressure DG, it can reach ≤160℃ (the upper limit designed by some manufacturers is 205℃), suitable for medium and high-pressure boiler feed water, thermal system circulation, and hot water transportation. The suction pressure ≤0.6 MPa, with a solid content <1%.
DF Series (Corrosion-resistant Type): It is used for transporting corrosive liquids, with a medium temperature ≤105℃, and the suction pressure ≤0.6 MPa. The material can be upgraded to SS304/SS316/dual-phase stainless steel, and the sealing type is mechanical seal, suitable for chemical processes, acid and alkali liquid transportation.
DY Series (Oil Pump Type): It is used for transporting oils and petrochemical products, with a medium temperature ≤150℃ and viscosity ≤120 cSt. It is suitable for working conditions such as refineries, petrochemicals, and oil pipelines.

Segmented single-shell type: The suction section, multiple middle sections, and the discharge section are connected in series by 4 to 8 tightened bolts. The metal surface is a hard seal (without gasket), and the pressure capacity can reach 7.5 MPa.
Multi-stage impeller series: The impellers of each stage are arranged in the same direction on the same shaft, and the inter-stage is transitioned by guide vanes. The last impeller is followed by the final guide vanes, converting kinetic energy into pressure energy.
Axial force balance: A balance disc, balance drum, or a combination of both is adopted to counteract the huge axial thrust generated by the multi-stage impellers. The balance disc structure automatically adjusts the gap to adapt to changes in operating conditions.
Bearings assembly: Both ends are supported by sliding bearings or rolling bearings, lubricated with thin oil (oil ring/pressure oil), and the bearing body has a cooling water jacket (high-temperature type DG).
Sealing system:
Packing seal (standard): A cooling water jacket is provided outside the packing box, and normal temperature clean water is introduced to cool the packing to prevent it from being burned by high-temperature media.
Mechanical seal (optional): A packaged mechanical seal with double end faces and a barrier liquid system, suitable for high-temperature, flammable, and toxic media.
Drive method: Elastic coupling direct connection to the motor (standard), gear coupling, diaphragm coupling, hydraulic coupling. The prime mover can be an electric motor or a small steam turbine.

Multistage Centrifugal Pump for High Head​ In the following "high head, medium-low solid content" operating conditions, it is the core equipment:
Boiler feed water: ​ Medium and high-pressure boiler feed water systems in power plants, chemical plants, and steel mills, with DG type as the main force, with medium temperature ≤ 160℃
High-rise building water supply: ​ Zone water supply for buildings over 100 meters, rooftop tank replenishment, fire protection network pressure boosting
Mine deep well drainage: ​ Central water storage drainage in coal mines and metal mines, with a head of 100–600 meters and solid content < 1.5%
Petroleum and petrochemicals: ​ DY type for transporting crude oil, refined oil, liquefied gas, and chemical raw materials, pipeline water injection, refinery process
Chemical process: ​ DF type for transporting corrosive liquids, acid-base solutions, solvents
Nuclear power plant: ​ Auxiliary water supply system, safety injection system (requires nuclear grade certification)
Industrial circulation: ​ High-pressure cleaning, descaling systems, hydraulic system pressure boosting

1. Large-scale advanced manufacturing capabilities
CZME has a modern base equipped with 126 cores and 34 sets of professional equipment, covering the entire production process; 23 CNC centers ensure an accuracy of ± 0.01 millimeters and high matching for pump body assembly; with ISO 9001 and ce certifications, quality is strictly controlled.
2. Super wear-resistant materials, leading the industry in daily life
Selected from top Chinese foundries with high-chromium alloys (Cr26 ~ Cr28) and rubber liners, the wear resistance is three times higher than the industry standard; with a monthly casting capacity of 1,000 tons, hardness Hrc60 + after heat treatment, the product lifespan is extended by 2-5 times.
3. Achieve Agile Delivery, Ensure Global Supply Security
Support 20-day small batches and 45-day large batches; Cooperate with multiple international logistics companies to provide various delivery solutions, serving over 100 countries; Maintain inventory of frequently used and easily damaged parts to reduce downtime.

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