NDS Axially Split Case Multistage Pump



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  • 2018 CNP overseas customers conference



The pump shell is separated horizontally on the axis line, the upper part is the pump cover, the lower part is the pump body, the suction inlet and outlet are on the pump body below the pump axis, the impeller is symmetrically arranged, and the axial thrust is automatically balanced without complex balancing mechanism. The seal of the pump adopts mechanical seal. The centerline supports a separate pump foot structure, the bearing body adopts an air-cooled structure, and there is a fan on the outside of the bearings at both ends, which is convenient for heat dissipation.

The basic configuration of the shaft seal is a mechanical seal, and the pump body adopts a centerline support structure. The standard configuration of the bearing part is the air-cooled oil lubricated bearing part, the driving end adopts the sliding bearing to bear the radial force, and the non-driving end is equipped with two angular contact bearings and a sliding bearing. The impeller is set to balance the axial thrust with the same number of impellers arranged on both sides.

The axial split structure of the pump is convenient for maintenance, it only needs to open the pump cover, and the split-half structure of the sealing ring makes the maintenance more convenient, the sealing ring can be replaced without removing the impeller, and there is no need to disassemble the inlet and outlet pipeline.


According to the different characteristics of the pump, the first stage impeller can be set as a double suction impeller when the cavitation performance is high.

Improve the cavitation resistance of the pump.

The pressurized water chamber adopts double volute structure, and the radial force is completely balanced in theory.

The drive end is designed with a tapered shaft, and the coupling is easy to disassemble.




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Flow rate:max 5000m³/h



Speed:2900/1450/980/740 rpm


Wastewater &oil ,residual oil transferring

Crude oil &product oil transferring

Water supply pipelines

Long-distance water transferring

High pressure water injection

Seawater desalination


Stainless steel/Cast iron/Cast steel

CNP integrates the advanced R&D technologies from Europe and America, with the most advanced industrial design concept in Western Europe, with the production experience of modern industrial clusters in North America, with the most efficient and energy-saving product structure research in Hangzhou, China.

With the application of information technology, CNP has built its own smart factory, taking the lead in the introduction of SAP resource management system, becoming one of the key units of the key construction project of  "machine substitution" in Hangzhou, with the whole process of production information monitoring and tracking, applying laser welding technology to the manufacturing process of robot pump spare parts in depth, using progressive die technology to ensure the quality of the whole process of the parts, all of which greatly reduce the production and manufacturing cycle, provide an intelligent production and manufacturing basis for the pump production.

CNP was recognized as state-certified enterprise technology center in 2016. It is the highest evaluation level for technology center in China. Besides, CNP has been carrying some technical courses in 11/12/13th National Five-Year Plan.

CNP uses digital integrated intelligent control technology to create domestic advanced M2M mode, intelligent control technology.

It includes intelligent current stabilization system, intelligent vacuum suppression system, intelligent auxiliary control monitoring system, intelligent non-negative pressure full frequency control system and intelligent water hammer two-way elimination system.