SP series high-flow mixed flow pump manufactured by China factory for flood control and irrigation
SP Series Mixed Flow Pump

Centrifugal Pump

SP Series Mixed Flow Pump

The SP series is a mixed flow pump designed for high-volume, low-head applications. Flow up to 700m³/h, head from 5-25m, power to 400kW. Materials include cast iron, 304/316L, and duplex steel. Handles clean water, seawater, and corrosive chemicals. Ideal for chemical evaporator circulation, power plant cooling, marine aquaculture, and flood control. ISO certified.
  • OEM
  • Factory Direct Supply
  • ISO9001 Certified
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Overview

Product Overview

Product Description

SP Series Mixed Flow Pump – High Efficiency at Low Head

Mixed flow impeller combines axial and radial characteristics – delivers higher flow than standard centrifugal pumps at low head (5-25m) with excellent efficiency. Available in horizontal or vertical configuration to suit space constraints. Double mechanical seal option for corrosive media. Suitable for continuous heavy-duty circulation duties in chemical, power, and water treatment plants.

KEY FEATURES

  • High Flow at Low Head: Mixed flow hydraulic design delivers 50-700 m³/h at 5-25m head – ideal for circulation and intake applications.
  • Flexible Installation: Available in horizontal (foot-mounted) or vertical (direct-coupled) configurations to match existing plant layouts.
  • Corrosion-Resistant Materials: Options include cast iron, 304/316L stainless steel, and duplex steel for seawater or chemical service.
  • Advanced Sealing Options: Double mechanical seal available for corrosive or hazardous liquids, ensuring leak-free operation.
  • Wide Temperature Range: Handles liquids from -20°C to +120°C, suitable for hot water circulation and moderate-temperature chemical processes.

Specifications

Technical Parameters

Parameter Specification Parameter Specification
Product Name SP Series Mixed Flow Pump Model SP
Category Mixed Flow Centrifugal Pump Flow Rate 50 - 700 m³/h
Head 5 - 25 m Power 15 - 400 kW
Speed 970 / 1450 rpm Suction & Discharge Diameter 100 - 800 mm
Max. Working Pressure ≤ 0.6 MPa Pump Body Material Cast Iron / 304 / 316L / Duplex Steel
Seal Type Packing Seal / Double Mechanical Seal Liquid Temperature Range -20 to +120 ℃
Liquid Type Clean Water / Seawater / Chemical Corrosive Liquids Installation Type Horizontal / Vertical
Certification ISO9001 / ISO14001 / ISO45001

Custom models available upon request

Manufacturing

Precision engineering, advanced facilities.

Certifications

Global certifications for reliable performance.

OEM/ODM

Tailor-made pumps for your specifications.

Packaging

Robust export packaging for safe delivery.

Use Cases

Applications

Reliable High-Volume Low-Head Pumping for Chemical Processing, Water Conservancy, Power & Environmental Sectors The SP series mixed flow pump is engineered for applications requiring large flow rates at relatively low heads, offering smooth, efficient performance across various industries.

  • Chemical & Petrochemical

    Ideal for evaporator forced circulation, reactor circulation, tower bottom circulation, and chemical wastewater transfer.

  • Water Conservancy & Agriculture

    Perfect for large-scale irrigation and drainage, flood control, river water exchange, and reservoir intake.

  • Power & Metallurgy

    Reliable for power plant cooling water, circulating water, descaling water, and seawater desalination intake.

  • Environmental & Water Treatment

    Suitable for municipal sewage lift stations, neutralization tank circulation, and printing/dyeing or paper mill wastewater transfer.

  • Marine Aquaculture

    Effective for seawater intake, recirculating aquaculture systems, and fish pond water exchange.

Support

Frequently Asked Questions

What is the difference between a mixed flow pump and a standard centrifugal pump?
A mixed flow pump combines characteristics of radial-flow (centrifugal) and axial-flow pumps. It delivers higher flow rates than a standard centrifugal pump at the same low head (5-25m), while maintaining better efficiency than an axial pump across a wider operating range. The SP series is ideal for high-volume, low-head circulation, intake, and drainage applications.
Can this pump be used for seawater intake in an aquaculture facility?
Absolutely. For seawater applications, we recommend using duplex stainless steel (2205) or 316L stainless steel construction to resist chloride corrosion. The SP series is available with double mechanical seals suitable for seawater service, and the pump can be supplied in vertical configuration for direct mounting on floating docks or intake structures.
What sealing options are available for corrosive chemical media?
For clean water or sewage, packing seals are cost-effective. For corrosive chemical liquids (e.g., acids, alkalis, solvents), we recommend double mechanical seals with a suitable barrier fluid and API flush plan. Please provide your media composition and operating temperature for proper seal selection.
What is the maximum working pressure of the SP series?
The maximum working pressure is 0.6 MPa (6 bar / 87 psi). This is typical for low-head mixed flow pumps. For higher pressure requirements, please consider our ISO end suction pump or multistage pump series.
What motor and voltage options are available for the SP pump?
The SP series can be driven by electric motors from 15kW to 400kW, available in standard low-voltage (380V/415V) and high-voltage (6kV/10kV) configurations. For off-grid or mobile applications, we also offer diesel engine drive options upon request. Please specify your power supply and required duty point for a complete technical proposal.

Have more questions? Our technical team is ready to help you select the right pump model.

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Need Help Selecting the Right Pump?

Our engineering team will provide a professional selection recommendation within 24 hours based on your specific requirements.

Contact Information

WeChat: +86-13952764345
Address Industrial Park
Manufacturing District, China

What We Need

Flow Rate Required Specify your required flow rate (m³/h)
Total Head Needed Required pumping head (m)
Liquid Type Type of liquid to be pumped
Solid Particle Size Maximum solid size (mm)

Response Time

24-48h

Technical recommendations and quotations during business days

Our experienced engineers will analyze your application and provide detailed pump selection with complete technical specifications and pricing.

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