English
русский
EspañolContent
A horizontal SP mixed flow pump is a centrifugal pump that combines radial-flow and axial-flow characteristics, delivering high flow rates at moderate head pressures. It is widely used in chemical processing, petroleum refining, metallurgy, chemical fiber production, and power generation industries. The SP designation refers to a specific series configuration, while horizontal indicates the pump shaft is oriented horizontally for easier maintenance and alignment with standard motors.
The mixed flow design offers a flat efficiency curve, meaning the pump maintains good efficiency even when operating away from its best efficiency point. This is particularly valuable in applications with variable flow demands.
1. Working Principle
A mixed flow pump operates on a principle that sits between centrifugal and axial flow designs. The impeller directs fluid both radially (outward) and axially (along the shaft centerline), delivering higher flow rates than a pure centrifugal pump while achieving higher head than a pure axial flow pump.
Key characteristics include:
- Flow range: 100 to 10,000 m³/h, suitable for large-volume fluid transfer
- Head range: 5 to 50 meters, covering moderate pressure applications
- Efficiency: 75% to 88%, with a flat efficiency curve
- Speed: 1450 or 2900 rpm, matching standard motor configurations
- Configuration: Horizontal shaft, single-stage design
2. Key Specifications
Volume of fluid the pump can move per hour
Pressure or height the pump can lift fluid
Depends on materials and sealing configuration
Matched to fluid chemistry and operating conditions
3. Comparison with Other Pump Types
| Parameter | Mixed Flow Pump | Centrifugal Pump | Axial Flow Pump |
|---|---|---|---|
| Flow Direction | Radial + Axial | Radial | Axial |
| Flow Rate | High | Low to Medium | Very High |
| Head Range | Moderate (5-50m) | High (up to 500m+) | Low (1-15m) |
| Efficiency Curve | Flat, broad range | Peaked, narrow range | Flat, broad range |
| Best Applications | Industrial processing, water supply, circulation | High-head, low-flow applications | High-flow, low-head applications |
4. Typical Applications
Circulation of corrosive fluids, transfer of chemical intermediates, and reactor feed services.
Crude oil transfer, refined product circulation, and cooling water systems.
Cooling water circulation, slurry handling, and process fluid transfer.
Cooling water systems, condensate extraction, and auxiliary service water.
Polymer solution transfer, spinning solution circulation, and process fluid handling.
Raw water intake, cooling tower circulation, and general industrial water distribution.
5. Material Selection Guide
General-purpose stainless steel for mild chemical services, water, and non-corrosive fluids.
Enhanced corrosion resistance for chloride-containing fluids, chemical processing, and marine applications.
Super austenitic stainless steel for sulfuric acid, phosphoric acid, and aggressive environments.
Duplex stainless steel combining high strength and corrosion resistance for chloride and acidic services.
Super duplex stainless steel for highly corrosive environments, seawater, and high-temperature applications.
High-strength alloy for severe corrosion and erosion conditions, including acidic and abrasive slurries.
Nickel-based alloy for extreme corrosion resistance in highly aggressive chemical environments.
High-purity material for applications requiring exceptional corrosion resistance and low specific gravity.
6. Production and Quality Assurance
Jiangsu Huanyu Chemical New Materials Co., Ltd. has been manufacturing industrial pumps since 1987. The company employs over 100 skilled personnel and operates integrated facilities encompassing machinery manufacturing, hot and cold processing, and investment casting.
The product portfolio includes more than ten series and over 300 specifications of chemical pumps, with the horizontal SP mixed flow pump being a core offering. Each pump is manufactured using precision CNC equipment and subjected to rigorous quality control throughout the production process.
7. Procurement Checklist
8. Frequently Asked Questions
A mixed flow pump combines radial and axial flow characteristics, delivering higher flow rates at moderate head than a pure centrifugal pump. Centrifugal pumps are better suited for high-head, low-flow applications.
The SP designation refers to a specific series configuration of mixed flow pumps. The exact meaning may vary by manufacturer, but it generally indicates a standard design within the mixed flow pump category.
Available materials include 304, 316L, 904, 2205, 2507, CD4, Hastelloy, titanium, and 2520. Selection depends on fluid chemistry, temperature, and corrosion requirements.
These pumps are used in chemical processing, petroleum refining, metallurgy, chemical fiber production, power generation, and industrial water supply systems.
Selection requires defining flow rate, total head, fluid properties, and operating temperature. Consult with the manufacturer's application engineers for specific recommendations.
Looking for reliable horizontal SP mixed flow pumps?
Jiangsu Huanyu Chemical New Materials Co., Ltd. has been manufacturing chemical pumps since 1987. With over 100 employees and 300+ specifications, we offer pumps in a wide range of alloy materials to match your specific fluid conditions.
