Froth pumps

Address air locking and wear with a KREBS® froth pump

Air locking can wreak havoc on pump efficiency and availability. KREBS hMAX, vMAX, and slurryMAX pumps stand up to this challenge and more, delivering reliable and effective performance when pumping slurries with high air entrainment.

Key benefits of our froth pumps

  • Reduce air locking

    Air locking results in decreased pump efficiency, and wear. KREBS froth pumps reduce air locking, with hMAX and vMAX pumps featuring a recessed impeller that allows clear passage of entrained air, even at high froth factors. This is the important notes of the consequences of air locking a pump: It is critical to keep air out of a pump.

  • Optimise pump liner performance

    With multiple elastomers, high-chrome alloys, and polyurethane combinations available, KREBS pump liners are customised the application to deliver even, predictable wear, enabling optimised maintenance scheduling to reduce downtime and inventory. Our krebs pumps have many options for liner materials. From the most abrasive of slurries to the most acidic, we can find a material best suited for the application to ensure reliable pump operation and optimized pump wear life.

  • Easier inspection and maintenance

    From sizes 8x6 in. (200x150mm), slurryMAX pumps feature a simple-to-remove suction liner assembly, allowing inspection of internal components and replacement of the impeller without removing the discharge pipe.

Our froth pumps

hMAX slurry pumps

Featuring a recessed impeller and suitable for handling applications with a high froth factor (>4), the hMAX horizontal pump allows clear passage of entrained air without impacting duty flow and head in flotation applications.  

  • Concentric casing reduces radial loads.   
  • Extended wear life.   

Add-ons to our froth pumps

Quickly and easily change out the v-belts in minutes without realigning the pulleys  

Cut wear parts replacement time by 50% or more while also increasing safety  

Monitor and optimise pump operations with real-time data and instant alerts  

Maintenance & service of our froth pumps

Our network of service and spare parts centres ensures timely access to spare/wear parts and fast offsite rebuilds. Expert site service engineers monitor pump performance, recommending upgrades or updates to operating practices to maintain BEP as process conditions develop over time. We also offer operation and maintenance training, including adjusting the wear ring.

Learn more about FLS service centres

Want to talk? Reach out to our experts

Frequently asked questions

FAQs for froth pumps

Froth pumps are designed to handle frothy slurries, which are mixtures of air, liquid, solids, and chemicals. In mineral processing applications, they are found after the grinding circuit in the flotation circuit.

Froth volume factor is the measure of air contained in the slurry – it is found by taking a sample of the slurry and recording the difference between the volume with the bubbles and the volume after the bubbles have popped.  

The froth volume factor is then corrected for the tenacity of the bubbles to get the froth factor.