HW Series Horizontal Mixed Flow Pump
A horizontal, single-stage, single-suction volute mixed flow pump for clean water up to 50°C, with capacity from 25 to 940 L/s and heads of 5-12.5 m.
The HW series is a horizontal, single-stage, single-suction volute mixed flow pump that combines the working principles of the centrifugal and axial flow pump. Published coverage is a capacity of 25-940 L/s at heads of 5-12.5 m, for clean water or liquids with similar properties at temperatures below 50°C. Because it develops both centrifugal force and axial thrust at the impeller, the pump moves large volumes of water at low to medium head with high efficiency. The pump is made up of the pump cover, impeller, pump body, pump shaft, shaft sleeve and bearing housing, and the shaft sealing device consists of packing, a packing gland and packing rings. Applications are in industrial circulating water, urban water supply and drainage, agricultural irrigation, water conservancy and flood control.
| Parameter | Specification |
| Capacity | 25-940 L/s |
| Head | 5-12.5 m |
| Pump type | Horizontal, single-stage, single-suction volute mixed flow |
| Liquid temperature | Below 50°C |
| Speed | 580-2900 r/min (published models) |
| Shaft seal | Packing, packing gland and packing rings |
| Main components | Pump cover, impeller, pump body, pump shaft, shaft sleeve, bearing housing |
| Structure | Cantilever design with front and rear open access for inspection |
| Media | Clean water and liquids with physical and chemical properties similar to water |
The table lists published HW models with their suction capacity in litres per second and cubic metres per hour, head, speed and shaft power. Capacity can be adjusted by trimming the impeller or fitting an impeller with different characteristics.
| Model | Capacity (L/s) | Capacity (m³/h) | Head (m) | Speed (r/min) | Shaft power (kW) |
| 100HW-5 | 25 | 90 | 5 | 2900 | 1.55 |
| 100HW-8 | 25 | 90 | 8 | 2900 | 2.42 |
| 100HW-12 | 25 | 90 | 12.5 | 2900 | 3.78 |
| 150HW-5 | 50 | 180 | 5 | 1450 | 2.99 |
| 150HW-8 | 50 | 180 | 8 | 1450 | 4.78 |
| 150HW-12 | 50 | 180 | 12.5 | 2900 | 7.47 |
| 200HW-4 | 95 | 340 | 4 | 1060 | 4.6 |
| 200HW-5 | 100 | 360 | 5 | 1450 | 6.01 |
| 200HW-8 | 100 | 360 | 8 | 1450 | 9.39 |
| 200HW-12 | 100 | 360 | 12.5 | 1450 | 14.68 |
| 250HW-4 | 125 | 450 | 4.2 | 980 | 6.3 |
| 250HW-5 | 150 | 540 | 5 | 1180 | 8.97 |
| 250HW-7 | 125 | 450 | 7 | 980 | 10.5 |
| 250HW-8 | 150 | 540 | 8 | 1180 | 14.01 |
| 250HW-12 | 150 | 540 | 12.5 | 1180 | 21.88 |
| 300HW-4 | 197 | 710 | 4 | 780 | 4.4 |
| 300HW-7 | 216 | 780 | 7 | 980 | 17.7 |
| 350HW-4 | 278 | 1000 | 4.3 | 980 | 16.6 |
| 400HW-7 | 350 | 1260 | 6.8 | 730 | 28.1 |
| 500HW-6 | 550 | 1980 | 6.2 | 580 | 38.9 |
| Item | Detail |
| Shaft seal | Packing with a packing gland and packing rings, which stops air being drawn in and water leaking out along the shaft |
| Impeller | Outer diameter can be adjusted, or an impeller with different characteristics fitted, to meet a specific duty |
| Main parts | Pump cover, impeller, pump body, pump shaft, shaft sleeve and bearing housing |
| Structure | Cantilever design with front and rear open access for inspection and maintenance |
| Priming | Irrigation water can be added, or a vacuum pump connected, to prime the pump |
| Drive | Electric motor drive on a common baseplate |
- Industrial circulating water: Circulates cooling and process water in chemical, power, metallurgy and papermaking plants.
- Urban water supply: Moves large volumes in water treatment and distribution works.
- Sewage and drainage stations: Handles high-flow drainage duties in municipal facilities.
- Agricultural irrigation: Irrigates rice fields and dryland farming from canals and rivers.
- Water conservancy projects: Serves pumps in irrigation and water transfer schemes.
- Flood control and aquaculture: Provides flood drainage and pond circulation duty.
- Start from the required flow in L/s or m³/h, because the HW series is chosen for large volume at low head rather than for pressure.
- Check the total head falls inside the 5-12.5 m band, including friction losses in the discharge line.
- Keep the pumped liquid below 50°C and free of abrasive solids.
- Compare the published shaft power with your duty, then allow for the motor efficiency and service factor.
- Decide whether the impeller should be trimmed or replaced to match the exact duty, and confirm the priming method on site.
When should I use an HW mixed flow pump instead of a centrifugal pump?
Choose the HW series when you need very large flow at low head - from 25 to 940 L/s at 5-12.5 m. A standard centrifugal pump is better suited where the head requirement is higher and the flow lower.
What is the maximum water temperature for an HW pump?
The published limit is below 50°C for clean water or liquids with physical and chemical properties similar to water.
How can the duty of an HW pump be adjusted?
The outer diameter of the impeller can be adjusted, or an impeller with different performance characteristics fitted, so the pump can be matched to the user's duty.
What is the HW series pump used for?
Industrial circulating water, urban water supply and drainage, agricultural irrigation, water conservancy, flood control and drainage and aquaculture.
What capacity and head does the HW series cover?
Capacity from 25 to 940 L/s at heads of 5-12.5 m, with speeds from 580 r/min to 2900 r/min depending on the model.
What type of pump is the HW series?
It is a horizontal, single-stage, single-suction volute mixed flow pump, which combines centrifugal and axial flow working principles.
Which seal does the HW pump use?
A packing seal made up of packing, a packing gland and packing rings, which prevents air entering and water escaping along the shaft.
What data is needed to select an HW pump?
Required flow in L/s or m³/h, total head, water temperature, suction conditions, voltage and frequency.
Related Products
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- IS Series End-Suction Centrifugal Pump
- ZX Series Self-Priming Centrifugal Pump
How to Choose the Right HW Series Horizontal Mixed Flow Pump
Quick answer: The HW Series Horizontal Mixed Flow Pump covers capacity 25-940 L/s, heads of 5-12.5 m. Selection starts from the duty point - flow, head, liquid properties and available NPSH - rather than from the catalogue maxima.
Industry Applications
Explore how this equipment can be applied in related industrial sectors and review application-specific selection guidance.