Axial Flow Pump Buyer's Guide for Philippines | Selection & Sizing
What Is an Axial Flow Pump?
An axial flow pump, also called a propeller pump, moves fluid by directing flow along the pump shaft axis using an impeller with curved blades. It is designed for high flow rates and low to medium discharge heads, making it ideal for water transfer in open channels, reservoirs, and dewatering applications. In the Philippines, these pumps are widely used in irrigation systems, flood control projects (e.g., Metro Manila drainage), aquaculture, and industrial cooling water circuits. Unlike centrifugal pumps, axial flow pumps produce minimal radial force and can handle large solids or debris when fitted with open impellers.
How It Works: Key Concepts
The pump's impeller acts like a ship propeller, pushing water axially upward through the casing. Guide vanes downstream straighten the flow to recover kinetic energy, increasing efficiency. Typically, axial flow pumps achieve efficiencies of 80–90% at design point. They are available in vertical, horizontal, and submersible configurations. Vertical shaft pumps are common for pit installations, where the pump is suspended in a sump or wet pit. Horizontal axial flow pumps are used for booster stations and pipelines. Submersible axial flow pumps are popular for flood control and sewage lift stations.
Typical Specifications
| Parameter | Range |
|---|---|
| Flow rate | 500 – 100,000 m³/h |
| Total head | 1 – 20 m |
| Discharge diameter | DN150 – DN2000 |
| Motor power | 5 – 500 kW |
| Speed | 400 – 1800 RPM |
| Efficiency | 70 – 90% |
Types & Applications in the Philippines
- Vertical axial flow pumps: Installed in wet pits, common in irrigation and flood control. Used by NIA for rice paddies and by MMDA for drainage.
- Horizontal axial flow pumps: Used in industrial cooling water systems, power plants, and bulk water supply. Efficient for pipeline booster stations.
- Submersible axial flow pumps: Ideal for deep pits, sewage lift stations, and emergency dewatering. Often supplied with submersible motors.
- Mixed flow pumps: Combine radial and axial action for moderate head/high flow — used in fishponds and water treatment plants.
Selection Criteria (How to Choose the Right Axial Flow Pump)
- Determine flow rate (m³/h): Calculate peak demand. For irrigation, typical requirement per hectare is 2–5 L/s. For flood control, design for 24-hr maximum rainfall event.
- Total dynamic head (m): Include static lift, friction losses, and discharge pressure. Axial flow pumps are optimal for heads below 15 m.
- Pump efficiency and NPSH: Check NPSH available vs required to avoid cavitation. High efficiency reduces energy cost over pump life.
- Materials compatibility: Use cast iron for clean water, bronze or stainless steel for brackish/corrosive water. Impellers often in SS316 for seawater.
- Drive type and power: Electric motor (460 V / 3-phase) is common; for remote areas, consider diesel engine or solar drive.
- Installation environment: Wet pit requires vertical shaft; dry pit horizontal; submersible for flooded areas. Ensure proper sump design to avoid vortex formation.
Chemical Metering Pumps for Supporting Dosing Applications
While axial flow pumps handle transport, many water treatment systems require precise chemical dosing (e.g., chlorine, coagulants). 3G Electric supplies peristaltic metering pumps from CHEM-TECH, STENNER, PULSATRON, and MEC-O-MATIC (SKUs 871AU5, 806PL7, 35U540, 871AU6, 35U546, 35U549, 3HHF7, 4VZG3). Below is a comparison of select models for typical dosing requirements.
| Model | Max Flow (gpd) | Motor (hp) | Voltage | Tubing | Reproducibility |
|---|---|---|---|---|---|
| CHEM-TECH 871AU5 Peristaltic Metering Pump | 4 | 1/6 | 115V AC | Neoprene | ±2.0% |
| PULSATRON 806PL7 Peristaltic Metering Pump | 30 | 1/6 | 230V AC | Neoprene | ±3.0% |
| STENNER 35U540 Peristaltic Metering Pump | 10 | 1/30 | 120V AC | Santoprene | ±2.0% |
| CHEM-TECH 871AU6 Peristaltic Metering Pump | 15 | 1/6 | 115V AC | Neoprene | ±2.0% |
| STENNER 35U546 Peristaltic Metering Pump | 22 | 1/30 | 120V AC | Santoprene | ±2.0% |
Why Source Axial Flow and Related Pumps from 3G Electric?
3G Electric has over 35 years of experience supplying industrial equipment to the Philippines. Our inventory includes more than 56 pump-related products across multiple categories, including peristaltic metering pumps for precise chemical dosing. We interpret your application needs, source genuine components from trusted manufacturers, and provide technical support for selection and installation. With local delivery and responsive service, we help your operation stay productive.
Frequently Asked Questions
Q: What is an axial flow pump used for in the Philippines?
A: Axial flow pumps are used for high-volume water transfer: irrigation supply, flood control drainage, industrial cooling water, and aquaculture aeration. They move tens of thousands of cubic meters per hour at low heads of 1–15 m.
Q: How do I size an axial flow pump for an irrigation project?
A: Calculate required flow based on area (e.g., 2–4 L/s per hectare) and total dynamic head (static lift + friction loss). Select a pump with efficiency above 80% at your design point. Consult 3G Electric for sizing assistance.
Q: Where can I buy axial flow pumps in the Philippines?
A: 3G Electric supplies axial flow pumps from major OEMs. Contact our sales team with your flow, head, and installation requirements for a quote and lead time.
Q: What is the difference between axial flow and centrifugal pumps?
A: Axial flow pumps move fluid along the shaft axis with a propeller, producing huge flows at low head. Centrifugal pumps impart radial kinetic energy and are better for higher heads at lower flows. Choose based on head required.
Q: Can peristaltic metering pumps be used alongside axial flow pumps?
A: Yes. Axial flow pumps handle bulk water, while peristaltic metering pumps (like those from CHEM-TECH and STENNER) precisely inject chemicals for disinfection, pH adjustment, or coagulation in treatment plants.
Key Takeaways
- Axial flow pumps deliver high flow (up to 100,000 m³/h) at low head (1–15 m) — ideal for Philippine agriculture, flood control, and industry.
- Select based on discharge diameter, materials (cast iron/bronze/SS), drive type, and installation configuration (vertical/horizontal/submersible).
- For precise chemical dosing, 3G Electric offers peristaltic metering pumps in multiple capacities (4–35 gpd) from brands like CHEM-TECH and STENNER.
- 3G Electric provides end-to-end support: interpretation, sourcing, technical advice, and local delivery across the Philippines.
Ready to specify your axial flow pump or need dosing pumps? Contact 3G Electric today for a quote and expert sizing assistance.
