1. The Value of the AF Vertical Froth Pump
In mineral flotation systems, slurry contains a large portion of air and froth. Traditional slurry pumps often suffer from reduced capacity, unstable operation, and severe air locking.
The AF Series Vertical Froth Pump—developed by CNSME Pump, a leading slurry pump and froth pump manufacturer—is designed to solve these problems and maintain efficient, continuous pumping.
The AF froth pump improves flotation plant performance, stabilizes flow rates, and reduces maintenance downtime.
2. Structural Features Purpose-Built for Frothy Slurry
1) SP/SPR Bearing Assembly
The AF Vertical Froth Pump adopts a heavy-duty SP or SPR bearing assembly, ensuring stable performance in demanding conditions. The bearing housing is equipped with a motor base or motor frame to allow for direct drive or V-belt drive, providing easy speed adjustment to meet varying process requirements.
2) Special Vertical Tank Design
The froth pump features a large vertical tank with a tangential inlet and overflow box:
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The tangential inlet helps the slurry enter the pump chamber smoothly while breaking down entrained air.
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The overflow box returns excessive slurry to the sump to maintain stable feeding.
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The tank can be manufactured from steel, stainless steel, or rubber-lined steel, depending on customer requirements.
This design is the core reason why the AF vertical froth pump excels in air-handling and anti-air-locking performance.
3) Double Casing Pump Head
The pump head adopts a double casing structure, with wet-end components available in:
This ensures excellent wear resistance and easy maintenance across a variety of slurry conditions.
4) Close Impeller Design
The AF pump uses an close impeller with 5 vanes, providing:
![AF Series Vertical Froth Pump: The Key Pumping Solution for Flotation Processes 2]()
3. Operational Advantages: Stable, Efficient, and Low Maintenance
1) Seal-less Design
The AF vertical froth pump uses a cantilever shaft and operates without shaft seals, meaning:
This is one of the major advantages of CNSME Pump’s froth pump technology.
2) Anti-Air-Locking Performance
The combination of a tangential inlet and open vortex action effectively separates air from slurry, preventing air locking—a common issue with conventional slurry pumps in flotation applications.
4. Application Fields
The AF Vertical Froth Pump is widely used in:
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Mineral flotation processing
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Phosphate beneficiation plants
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Copper concentration plants
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Gold, lead-zinc, and other nonferrous flotation facilities
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Any frothy slurry transport system
CNSME Pump’s AF froth pump products have been successfully applied in more than 40 countries and are fully compatible with Warman® froth pump models.
5. Complete Spare Parts Supply
CNSME provides a full range of pump spare parts for AF froth pumps, including:
6. CNSME Pump: A Reliable Froth Pump Manufacturer
With more than 20 years of manufacturing experience, CNSME Pump offers:
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High-quality AF Series Vertical Froth Pumps
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Full compatibility with Warman® froth pumps
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Superior engineering design and material technology
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Complete global spare parts support
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Customization services for special mining applications
For flotation circuits, frothy slurry systems, and tough air-handling applications, the CNSME AF Vertical Froth Pump is one of the most efficient and reliable solutions available.
