WFB Series Self-Priming Pump
A vertical self-priming centrifugal pump for slurry, municipal and industrial duty, covering 0.75-6850 m³/h at heads of 4-130 m with motor power from 0.75 to 250 kW.
The WFB series is a vertical self-priming centrifugal pump used in printing and dyeing, power, chemical, metallurgy, medicine, electroplating, environmental, municipal, mining and construction duty. Published coverage is 0.75-6850 m³/h at heads of 4-130 m with motor power from 0.75 kW to 250 kW, and the pump can be built in cast steel or stainless steel according to the medium. Instead of conventional packing or a mechanical seal, the pump uses a special leak-free sealing device, which removes the running, bubbling, dripping and leakage associated with traditional seals. That sealing device does not rub or wear during operation, and the supplier states its service life is more than ten times that of comparable products. Self-priming works through a gas-liquid separation chamber: liquid mixed with air is thrown into the chamber, the lighter gas leaves the mixture, and a vacuum forms at the pump inlet to complete priming.
| Parameter | Specification |
| Flow rate | 0.75-6850 m³/h |
| Head | 4-130 m |
| Motor power | 0.75-250 kW |
| Pump type | Vertical self-priming centrifugal |
| Speed | 2960 r/min (published models) |
| Suction height | 5 m (published models) |
| Shaft seal | Special frictionless sealing device replacing packing and mechanical seals |
| Materials | Cast steel or stainless steel, chosen according to the medium |
| Priming | Self-priming through a gas-liquid separation chamber |
Each published WFB model is quoted at three duty points, shown here as flow and head ranges at 2960 r/min, taken from the supplier's performance chart.
| Model | Flow (m³/h) | Head (m) | Power (kW) | Speed (r/min) | Inlet / Outlet (mm) |
| 50WFB11.2-10 | 6.7 / 11.2 / 13.4 | 10.9 / 10 / 9.3 | 1.5 | 2960 | 50 / 40 |
| 50WFB12.5-12.5 | 7.5 / 12.5 / 15 | 13.6 / 12.5 / 11.6 | 2.2 | 2960 | 50 / 40 |
| 50WFB11.2-16 | 6.7 / 11.2 / 13.4 | 17.6 / 16 / 14.8 | 2.2 | 2960 | 50 / 40 |
| 50WFB12.5-20 | 7.5 / 12.5 / 15 | 22 / 20 / 18.5 | 3 | 2960 | 50 / 40 |
| 50WFB11.2-25 | 6.7 / 11.2 / 13.4 | 27.4 / 25 / 23.7 | 4 | 2960 | 50 / 40 |
| 50WFB12.5-32 | 7.5 / 12.5 / 15 | 34.3 / 32 / 29.6 | 5.5 | 2960 | 50 / 40 |
| 50WFB11.2-40 | 6.7 / 11.2 / 13.4 | 42 / 40 / 38.4 | 7.5 | 2960 | 50 / 40 |
| 50WFB12.5-50 | 7.5 / 12.5 / 15 | 52.5 / 50 / 48 | 11 | 2960 | 50 / 40 |
| 50WFB12.5-64 | 7.5 / 12.5 / 15 | 66 / 64 / 62 | 15 | 2960 | 50 / 40 |
| 65WFB22.5-10 | 13.5 / 22.5 / 27 | 11.3 / 10 / 9 | 2.2 | 2960 | 65 / 50 |
| 65WFB25-12.5 | 15 / 25 / 30 | 14.1 / 12.5 / 11.3 | 3 | 2960 | 65 / 50 |
| 65WFB22.5-16 | 13.5 / 22.5 / 27 | 17.4 / 16 / 14.8 | 4 | 2960 | 65 / 50 |
| 65WFB25-20 | 15 / 25 / 30 | 21.8 / 20 / 18.5 | 5.5 | 2960 | 65 / 50 |
| 65WFB22.5-25 | 13.5 / 22.5 / 27 | 28 / 25 / 24 | 5.5 | 2960 | 65 / 50 |
| 65WFB25-32 | 15 / 25 / 30 | 35 / 32 / 30 | 7.5 | 2960 | 65 / 50 |
| 65WFB22.5-40 | 13.5 / 22.5 / 27 | 42.4 / 40 / 37.6 | 11 | 2960 | 65 / 50 |
| 65WFB25-50 | 15 / 25 / 30 | 53 / 50 / 47 | 15 | 2960 | 65 / 50 |
| Item | Detail |
| Casing material | Cast steel or stainless steel, selected according to the medium being pumped |
| Shaft seal | Special sealing device that replaces traditional packing and mechanical seals and prevents leakage |
| Seal wear | The sealing device runs without friction, which the supplier states gives a service life more than ten times that of comparable products |
| Dynamic seal | Optimally designed to meet sealing requirements while minimising energy consumption |
| Drive | Vertical motor-driven arrangement with automatic control capability |
| Automation | Suited to integration with highly automated systems where automatic control is required |
- Municipal sewage engineering: Handles sewage and drainage duties in public works.
- River and pond aquaculture: Circulates and transfers water in breeding ponds.
- Power and chemical plants: Moves process and slurry liquids in generating and chemical works.
- Metallurgy and mining: Transfers mineral processing slurry and wash water.
- Medicine and food: Pumps process liquids where corrosion resistance and leak-free operation matter.
- Fire protection and environmental works: Serves fire water supply and effluent handling duties.
- Choose the casing material from the medium - cast steel for general duty, stainless steel where the liquid is corrosive.
- Confirm the operating point against the three published flow and head points for each model, and pick the one nearest your requirement.
- Check that the 5 m published suction height covers your installation, since self-priming depends on it.
- Review the frictionless sealing device against the liquid, as it replaces conventional packing and mechanical seals entirely.
- State whether automatic control is needed, because the pump is designed to integrate with automated systems.
How does the WFB pump seal without packing or a mechanical seal?
It uses a special frictionless sealing device that replaces both. Because it does not rub or wear in operation, the supplier states the seal life is more than ten times longer than comparable products, and the usual running, dripping and leakage problems disappear.
How does the WFB pump prime itself?
The impeller draws in liquid and the air in the pipeline, and the mixture is thrown into the gas-liquid separation chamber. The lighter gas is discharged and the liquid returns, so a vacuum forms quickly at the pump inlet and priming is achieved.
What size of WFB pump do I need for a slurry transfer duty?
Define the flow and head, then match them to one of the three published operating points on the model you select. Flow runs from 0.75 to 6850 m³/h and head from 4 to 130 m across the series.
What is the WFB series pump used for?
Printing and dyeing, power, chemical, metallurgy, medicine, electroplating, environmental protection, municipal, mining, mineral processing and construction duty.
What flow and head does the WFB series cover?
Flow from 0.75 to 6850 m³/h and heads of 4-130 m, with motor power from 0.75 kW to 250 kW.
Which seal does the WFB pump use?
A special frictionless sealing device that replaces traditional packing and mechanical seals, eliminating running, bubbling, dripping and leakage.
What materials is the WFB pump available in?
Cast steel or stainless steel, chosen according to the medium being pumped.
How long does the WFB seal last?
The supplier states the sealing device runs without friction and that its service life is more than ten times that of comparable products.
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- WQ Series Submersible Sewage Pump
- SFB Series Corrosion Resistant Centrifugal Pump
How to Choose the Right WFB Series Self-Priming Pump
Quick answer: The WFB Series Self-Priming Pump covers flow 0.75-6850 m³/h, heads of 4-130 m, motor power 0.75-250 kW. 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.