Where High-Pressure Flows, YOUNAI Multi-stage Pumps Deliver
As a leading industrial pump manufacturer, YOUNAI provides a wide range of specifications of multistage pumps, which handle various high-pressure transportation. These multi-stage pumps are used in boiler feed duty, high-pressure injection, waterflood, firefighting, and water supply, delivering efficient and durable performance.
With proven experience and precision craftsmanship, YOUNAI delivers more than manufacturing multistage pumps – it provides end-to-end solutions that cover the entire high-pressure pumping process.
Multistage Pumps
Based on the state-of-the-art technology, combined with the accumulated production experience over the years, YOUNAI offers multistage pumps of the highest quality and extremely high-pressure.
Multistage Pumps for Water Market
YOUNAI high-pressure water pumps are designed to achieve extremely high head without sacrificing flow rate for clear water transportation. They are ideal for high pressure applications (up to 180℃) or long-distance clear water transfer.
Feed Water Pump
High Pressure Centrifugal Water Pump
Multistage Water Pump
Multistage Centrifugal Water Pump
Horizontal Multistage Water Pump
Multistage Booster Water Pump
Combining with High Efficiency & Durability
Multistage pumps have a complex structure – at YOUNAI, we put passion into every detail to build superior quality.
An optimized impeller hydraulic design guarantees maximum efficiency.
Dynamic balanced rotor enables smooth operation of pump.
Thickened pump body ensures better load-bearing capacity and operational stability.
The sturdy shaft ensures stability and reliability, and the shaft sleeve protects the wearing areas.
Mechanical seals ensure leakage-free operation, which is particularly important in flammable, explosive or toxic liquids.
Bearing units at both drive end and non-drive end to make the pump compact, reliable and easy to maintain.
Application
- Main boiler feed water services
- Auxiliary boiler feed services
- Coal-fired power station
- Gas-fired power plant
- Biomass-fired power plant
- Concentrated solar power plant
- Industrial power plant
- Steam generator feed
- General industry boilers
- General chemical high pressure process
- Hydrotreating unit high pressure feed application
- Hydrocracking unit high-pressure feed application
- Nitrogen oxides abatement
- Fuel injection
- Shower water in pulp, paper and board industry
- High pressure membrane feed in seawater Reverse osmosis
- Condensate extraction service
- Mine de-watering
- Waterflood
- Hydrocarbon processing
- Water injection platforms
- Auxiliary feed in nuclear power
- De-scaling
- Condensate extraction
- CO2 injection
- Petrochemical plants
- Synfuels
- Ultra-high-pressure applications
- Lean methanol liquid pump / Rectisol / low-temperature methanol process
- Off-shore and on-shore crude oil and gas shipping
Multistage Pumps for Firefighting
Multistage pumps excel in stable high-volume flow and high-pressure delivery – making them ideal for firefighting water pump equipment. YOUNAI not only supplies high-quality multistage pumps, but also customizes diesel engines, control cabinets, and auto-start/stop modules, delivering fully integrated fire pump packages. YOUNAI’s stable, high-performance multistage pumps ensure reliable operation for industrial firefighting and tall building firefighting systems.
Multistage Pumps Compliant with API 610
Durable high-temperature multistage pumps, barrel casing multistage pumps, and custom ultra-high-pressure solutions – proven for reliability.
The centerline-mounted design withstands high forces and torque loads, making it suitable for extreme operation conditions including ultra-high temperatures and ultra-high pressures.
- Max flow rate: 1200m3/h
- Max head: 2800m
- Max temperature: 180℃
- Application: ultra-high temperature ultra-high pressure feed water duty
- Boiler feed water pump in thermal power plant
- High-pressure duty in general industry
Highly reliable with long service life, horizontal radially split structure.
- Max flow rate: 800m3/h
- Max head: 1400m
- Max temperature: 210℃
- Application: crude oil
- Petrochemical and chemical
- Floating production storage and offloading operation
- High pressure service in general industry
Sealless design compliant with API685, double casing safe and reliable, higher differential pressure processing and higher efficiency.
- Max flow rate: 800m3/h
- Max head: 2400m
- Max temperature: 425℃
- Application: heavy chemical industry
- Toxic/aggressive/hazardous process
- Hydrocarbon / ethylene shipping
- High-pressure unit charge in refining
- Onshore and offshore water injection
The forged carbon steel/duplex stainless steel withstands ultrahigh pressure; Multiple barrel closure options and designs are available to match specific process requirements.
- Max flow rate: 1450m3/h
- Max head: 4000m
- Max temperature: 450℃
- Application: heavy chemical industry
- Refinery
- Petrochemical industry
- Power generation plant
- Water inject
- Offshore crude oil shipping
Conform to API610 11th edition and ISO13709. Superior hydraulic performance suitable for severe continuous operation in high-pressure applications.
- Max flow rate: 1200m3/h
- Max head: 2600m
- Max temperature: 195℃
- Application: Heavy duty boiler feed duty
- Oil refinery and pipeline
- Ultra high-pressure service
- Water injection
- CO2 injection
Rigorous Testing → Smooth Operation
The quality-proven testing process is the precondition of smooth operation at customer’s sites, we treasure this chance to adjust the performance of pumps to achieve an ideal condition.
- Q-H curve: outstanding performance, fully compliant;
- Hydrostatic test, 1.5× design pressure, 10 min hold;
- Continuous run test, stable under all rated conditions;
- Impellers precisely dynamically balanced.
- Low vibration, severity ≤ Grade B;
- Low noise, ≤ 80 dB(A);
- Excellent NPSH performance, complies with ISO 5199;
- Bearing temperature rise test meets standard;
- NDT for special materialcastings;
- All configuration(including motor) meets your needs.
- Test data confirms every pump delivers the highest efficiency, premium quality, and optimal operation.
- High efficiency reduce energy consumption
- Low net positive suction head match customers needs
- The overall service life of the pump unit exceeds expectations.
- The replacement cycles for mechanical seals and bearings have also been significantly extended.
- Only excellentpumps build client trust and forge long-term partnerships.
- YOUNAI has consistently gained the trust of customers in the high-pressure pumping field due to its outstanding quality, excellent performance, and numerous successful complex references.
A multistage pump is a type of centrifugal pump featuring more than two impellers. The most common type is the segmented multistage pump, where each segment contains one impeller. As the fluid passes through these multiple impellers, its pressure increases progressively with each stage, resulting in extremely high pressure and lift. At the same time it have a relatively large flow rate. Consequently, multistage pumps are widely used in various industries.
With a wide range, highly customized options, best quality raw materials, rigorous quality controls and after-sales support, our multistage pumps are the most outstanding in the market and capable of meeting various high-pressure transportation needs and purposes.
Multistage pumps deliver the highest operational pressure among centrifugal pumps, perfectly meeting diverse high-pressure large volume requirements. Our multiple models multistage pump range features flexible inlet and outlet pipeline layout (diverse nozzle position options) enabling customized installation schemes for all high-pressure applications. Satisfactory experience with YOUNAI motivates customers to renew their orders in our multistage pumps. Through competitive pricing and comprehensive commercial support, we enable clients to achieve up to 15-30% reduction in TOC.
How to choose the right horizontal multistage pump?
Firstly, we need to know your required flow rate, head and pressure; this is the initial step in the selection process to approximately identify the pump series, model and specifications;
Secondly, fully learn the physical and chemical properties of your pumping medium. The pH value is critical. If it is corrosive, choose properly corrosion-resistant materials, such as stainless steel SS304, duplex stainless steel SS316 / SS316L / 2205 / CD4MCu, or super duplex stainless steel 2507 and Titanium alloy, which process excellent corrosion resistance performance. If the medium contains solid particles, choose wear-resistant materials, such as Cr26, Cr30.
At last, the temperature of medium is a decisive factor. Pumping high-temperature fluids means significant challenges—an area where we excel. We know, successfully handling high-temperature, high-pressure fluids demands highly professional pump manufacturer. Our high-temperature multistage pumps meet the stringent specifications of API610, with a maximum head up to 1400m, maximum temperature up to 210℃, and the mechanical seals comply with API standard 682.
Conclusion, choosing the right multistage pumps is key to successfully handling high-pressure fluids. By rigorously evaluating operating parameters and fluid characteristics, combining with professional advice from our sales team and engineers, all of these ensure that your multistage pumps last for long service time with outstanding performance and reliability.
What key features do YOUNAI multistage pumps deliver?
- High efficiency brings lower energy consumption
- Low Net Positives Suction Head Required value (NPSHR) means premium hydraulic model of impeller and flow channel
- The innovation design of first stage impeller improves the anti-cavitation performance
- High quality materials ensure long lifetime
- Corrosion-resistant materials widely expanded the scope of applications
- Thickened heavy shaft and robust design of pump supports enhance bearing capacity and operation stability.
Multistage pumps are designed for a wide range of high-pressure transportation projects in various industries. They can handle a relatively large flow at very high pressure on continuous duty. The most common application of multistage pumps is working as boiler feed pumps, and they also used for mine drainage, seawater desalination treatment, cooling or heating system, general industry, municipal water supply, fire fighting water supply, etc.
In industrial boilers, high-pressure water must be delivered constantly and steadily—a requirement perfectly matches with multi-stage pumps’ capabilities. Particularly in power plants and chemical plants, horizontal multi-stage centrifugal pumps are always referred to as boiler feed water pumps. Our high-efficiency, durable and cost-efficiency high pressure multi-stage pumps are extensively applied in high-pressure boiler systems, continuously and reliably delivering high-pressure feed water to boilers.
