Engineered for Performance, Built for Reliability
- Optimized for high-flow, low-head applications.
- Maintains high efficiency across a broad range of flow conditions.
- Robust hydraulic design for continuous-duty operation.
- Available in multiple sizes and materials to match your system.
- Multiple installation configurations to suit your site requirements.
- Manufactured under an ISO 9001-certified quality management system.
YOUNAI: Expert in Vertical Axial Flow Pumps
With more than 30 years of experience in the design and manufacture of vertical axial flow pumps, YOUNAI has built deep engineering expertise in high-flow, low-head pumping applications — delivering reliable solutions where hydraulic performance and operational stability are critical.
Available in diameters from 225 mm to 3,100 mm, YOUNAI vertical axial flow pumps are widely used in agricultural irrigation and drainage, municipal water supply and stormwater management, thermal power plant circulating water systems, dock water level control, aquaculture, saltworks water intake, and other hydraulic infrastructure applications.
Supported by advanced manufacturing technologies, comprehensive assembly and performance testing capabilities, and extensive experience with large-scale vertical pump projects,YOUNAI delivers dependable pumping solutions engineered for long-term reliability in demanding operating environments.
Vertical Axial Flow Pumps
A comprehensive range of vertical axial flow pumps is available to meet the demands of diverse applications and operating conditions.
Flow rate: up to 54500m3/h
Head: up to 12m
Impeller: full-adjustable blade
Discharge: angled elbow discharge (customizable)
Materials: cast iron, carbon steel
Flow rate: up to 45000m3/h
Head: up to 4.3m
Impeller: semi – adjustable blade
Discharge: 90°elbow
Materials: cast iron, carbon steel
Flow rate: up to 30924m3/h
Head: up to 6 m
Impeller: fixed blade
Discharge: angled elbow discharge (customizable)
Materials: carbon steel, carbon steel, 304
Flow rate: up to 12600m3/h
Head: up to 5.5 m
Impeller: fixed blade
Discharge: 90°elbow
Materials: carbon steel, 304,316,316L,2205,2507,CD4MCu
Key Features of YOUNAI Vertical Axial Flow Pumps
Engineered for large-capacity, low-head fluid transfer.
The adjustable blade angle accommodates varying water levels, sustaining operation near the BEF.
Discharge outlet available above or below the base plate level or in two floor arrangement.
Available in carbon steel, stainless steel,duplex stainless steel and customized materials.
Vertical structure simplifies installation, alignment and servicing.
Flexible configurations for different project requirements.
CFD-Optimized Hydraulics
Higher efficiency. Lower energy costs. Reduced total cost of ownership.
Hydraulic efficiency is engineered in from the start. Using computational fluid dynamics (CFD), we optimize every element of the flow path in our vertical axial flow pump — from the inlet passage, impeller, and bowl to the column, elbow, and discharge piping — reducing hydraulic losses, suppressing turbulence and flow separation, and ensuring stable, efficient operation across varying load conditions.
Reliable Mechanical Design
Built to last. Less downtime. Better return on investment.
Structural integrity and application versatility are equally central to our design philosophy. A robust shaft system provides the mechanical stability required for safe, continuous operation of large-scale vertical axial flow pumps. Adjustable impeller blades allow the pump to maintain operation within its peak efficiency range as water levels fluctuate. Where corrosive fluids are involved, 316L and 2205 duplex stainless steel construction extends service life and broadens the range of viable applications.
End-to-End Customization
Engineered to your exact requirements for reliable performance and lower lifecycle costs.
From custom hydraulic configurations to large-format pump engineering, YOUNAI provides tailored solutions designed to meet specific flow, head, material, installation, and operational requirements. Every custom pump is manufactured using advanced production processes and subjected to rigorous assembly procedures and performance testing, including the proven capability to install and commission large-scale vertical axial flow pumps on site. Clients can rely on a solution built precisely to specification and verified to perform throughout its service life.
Proven Expertise in Vertical Axial Flow Pump Engineering and Manufacturing
Engineering Capability — 30 Years of Application Experience. With over 30 years of specialization in vertical axial flow pumps, YOUNAI provides end-to-end technical support across chemical, irrigation, flood control, industrial cooling, and large-scale water transfer projects. From hydraulic design and pump selection to material selection and system optimization, our engineers draw on deep application knowledge to deliver accurate, reliable solutions for complex operating conditions.
Manufacturing Capabilities: Located in Jiangsu Province—a region with a long-established industrial supply chain and extensive expertise in fluid handling equipment manufacturing— our facility is equipped with large-scale CNC machining centers, a 5-meter gantry machining center, and precision turn-mill and Swiss-type CNC lathes. Quality is verified through HEXAGON CMM inspection, SCHENCK dynamic balancing, and a dedicated pump performance test platform — with strict process controls applied at every stage of production.
Lifecycle Support: YOUNAI’s commitment extends well beyond delivery. We support installation planning, on-site commissioning, spare parts supply, troubleshooting, maintenance guidance, and remote technical assistance — keeping your systems running reliably throughout their service life.
Today, our vertical axial flow pumps operate in more than 20 countries and regions. Whether you are evaluating a new project or optimizing an existing system, we are ready to work alongside you from specification through long-term operation.
Applications of Vertical Axial Flow Pumps
From agriculture to infrastructure, our pumps are trusted across industries:
— High-flow, low-head transfer of corrosive fluids
Where chemicals require high-flow, low-head transfer, vertical axial flow pumps provide a reliable and efficient solution. For corrosion resistance, available materials include 304, 316, 316L, 2205, and 2507 stainless steel. For abrasion resistance, high-chromium alloy and wear-resistant cast iron extend component service life under demanding conditions.
— Seawater lifting and brine circulation
Constructed with corrosion-resistant materials including 316L and 2205 duplex stainless steel, they withstand the aggressive nature of high-salinity fluids while maintaining reliable, high-efficient flow throughout the production cycle.
Vertical axial flow pumps are a proven choice for large-scale water conservancy infrastructure, including permanent pumping stations, river diversion projects, and inter-basin water transfer schemes. Designed for high-flow, low-head conditions and adaptable to varying water levels, they deliver the stable, long-term operation that hydraulic engineering projects demand.
— Large-scale field irrigation and water supply
Vertical axial flow pumps deliver the high flow rates required to move water efficiently across vast agricultural land.
— Municipal stormwater and drainage stations
When water levels rise rapidly, vertical axial flow pumps respond with the large-volume discharge capacity that municipal drainage stations demand. Their ability to handle varying inlet conditions makes them a dependable choice for flood emergency response.
We have purchased three units of YOUNAI vertical axial flow pumps for salt evaporation operations at our coastal salt works. The flow rate is 650 m³/h and the material is 316L stainless steel. These pumps have been running for more than five years now — no single part has given us any problem. From what we are seeing on the ground, we believe these machines will serve us for very many years to come.
James MkwawaWe replaced our old equipment with YOUNAI vertical axial flow pumps — flow rate is 2300 m³/h. Honestly, in the beginning we were having some doubts only, whether it will be able to handle this kind of corrosive media with particles. But now everything is going very smoothly, no issues at all.
Rajesh MenonFor our water conservancy project, we are using five YOUNAI vertical axial flow pumps, with a flow rate reaching up to 35,000 m³/h. I want to say a special thanks to the YOUNAI team — they came to our site four times, each visit with very detailed and serious technical discussions. From those first conversations all the way to the successful start of the project, their dedication was really something. We worked together very, very well. Muchas gracias to all of them.
María Fernanda López
A vertical axial flow pump is a type of vane pump that moves liquid axially along the pump shaft using a rotating impeller, with the shaft mounted vertically. As a high flow low head pump, it is widely used in agricultural irrigation, municipal drainage, water conservancy projects, and industrial circulating water systems.
The wrong pump costs more than you think. Start with your flow rate and head requirements, as matching these precisely to the pump curve is the foundation of energy-efficient operation. Then consider your application environment: freshwater hydraulic infrastructure, corrosive chemicals, or high-salinity conditions each demand different material specifications.
High efficiency begins with an excellent hydraulic model. Using CFD software optimizes the flow path to minimize hydraulic losses and suppress turbulence; precision manufacturing creates smooth internal flow surfaces that further enhance efficiency and performance.
The purchase price is a one-time cost. Energy consumption and maintenance are not. Energy consumption, maintenance, and downtime often cost more than the initial purchase price over time. The more efficient the pump, the less you spend running it — and that gap widens every year.
Vertical Axial Flow Pump Application in Saltworks: Efficient Seawater Intake for Raw Salt Production
In coastal saltworks, pumping seawater from the ocean is the first step in raw salt production. As a key component of the water intake system, a small vertical axial flow pump is essential for efficient and reliable operation. Selecting the right pump directly determines operational efficiency and long-term running costs.
High flow, low head — built for saltworks water intake
Vertical axial flow pumps are the pump of choice for saltworks water intake, delivering high flow rates at low head—precisely the hydraulic conditions this application demands. Adjustable impeller blades help maintain peak efficiency across changing tidal conditions and water levels, minimizing performance losses caused by shifting operating conditions and delivering meaningful energy savings throughout the production season.
Corrosion resistance for high-salinity environments
Saltworks environments place extreme demands on corrosion resistance. Conventional ductile iron pumps deteriorate rapidly under prolonged exposure to high-salinity seawater. Vertical axial flow pumps built from 316L stainless steel resist chloride corrosion effectively, extending service life and reducing maintenance frequency and replacement costs. For the most demanding wetted components — impellers and guide vanes — 2205 duplex stainless steel offers superior strength and corrosion resistance, rated for over 10 years of continuous service in high-salinity seawater, bringing total cost of ownership down significantly.
Flexible sizing and installation
Available in a range of flow capacities to suit both small tidal flat operations and large-scale commercial saltworks.
With typical capacities of 500 — 700 m³/h and heads of 2.5 — 3 m, this small vertical axial flow pumps are well suited to the low-head, high-flow requirements of seawater intake systems in saltworks. Their hydraulic characteristics match the operating conditions commonly found in tidal flat salt production facilities, ensuring efficient and stable performance throughout the production season.
To simplify pump replacement and upgrade projects, these pumps are available in multiple installation configurations, including discharge outlets positioned above or below the base plate level, as well as two-floor arrangements. This flexibility allows the pump layout to be adapted to existing civil structures and pump stations, minimizing construction modifications, shortening installation time, and reducing project costs.
For saltworks operators, a properly specified vertical axial flow pump is more than a piece of process equipment. It is a long-term investment in lower energy consumption, higher production output, and reduced total cost of ownership.
Yes. Most of our vertical axial flow pumps are built to order—because no two water projects in the world are ever truly the same. Even small-scale applications like salt evaporation ponds may require tailored hydraulic solutions. This ensures each pump operates at its best efficiency point, delivering reliable performance with optimized energy consumption throughout its service life. That is why customization is not an option for us—it is the standard.
For water conservancy, irrigation, and agricultural applications, cast iron construction offers a cost-effective and durable solution. In chemical plants, material selection is dictated by the fluid handled, as there is no universal standard and compatibility with the process medium must be assessed case by case. For seawater and high-salinity environments, 316L or 2205 duplex stainless steel is recommended for its superior corrosion resistance and lower life cycle cost (LCC).
Yes. Every vertical axial flow pump is supplied with a full installation and operation manual, and free remote video guidance is available throughout the process. For more complex requirements, on-site engineering support can be arranged — our team stays with you from installation through commissioning until every issue is resolved.
Fixed-Blade: Impeller blades are set at a fixed angle and cannot be adjusted.
Semi-Adjustable Blade: Blade angle can be adjusted during shutdown after impeller disassembly.
Fully Adjustable Blade: Blade angle can be adjusted while the pump remains in operation, without shutdown or disassembly.
