FLSmidth Krebs gravelMAX Centrifugal Slurry Pump


FLSmidth Krebs gravelMAX Centrifugal Slurry Pump

The gravelMAX™ centrifugal slurry pump has a unique patented design developed to handle larger particles.


Industries and Applications of the gravelMAX Centrifugal Slurry Pump

  • Aggregates (Sand Plants,Cyclone Feed, Tailings)
  • Dredging
  • Coal
  • Heavy-duty abrasive slurries
  • Any application requiring large solids passing 


Increase Power & Reduce Cost in your mining enterprise

Krebs millMAX™ Pumps treat the cause of pump wear and loss of efficiency, whereas competitive pumps treat the symptoms through materials or predictive uneven wear rates.
The gravelMAX™ Pump has a unique patented design developed for severe abrasive slurries.
The gravelMAX™ Pump features a patented on-line wear clearance adjustment, which minimizes the cost-per-ton pumped compared to conventional hard metal and rubber lined slurry pumps through:
  • Pump higher percent solids
  • Maintenance of suction vacuum
  • Increase deposit life by digging deeper
  • Reduce power costs
  • Reduce the cost per ton
  • Adjust pump while running
  • Longer wear life of parts


Design Advantages of the gravelMAX Centrifugal Slurry Pump


High Radial Vanes

  • Clears large solids
  • Prevents solids from being crushed
  • Reduces casing slurry pressure at the eye of the impeller
  • Reduced power consumption

External Wear Adjustment Screw

  • Four screws for on-line wear clearance adjustment
  • Adjusted while the pump is operating
  • Adjusted six to eight times during the life of the pump

Adjustable Wear Ring

  • Allows a higher percentage of solids pumped and maintained throughout the life of pump
  • Adjusted during operation
  • Reduces suction side recirculation
  • Maintain hydraulic performance

millMAX™ Power Frame

  • Heavy duty cast pedestal
  • External bearing assembly adjustment
  • Wide bearing centers
  • Heavy duty shaft and bearings
  • Double clamp

Reverse Taper Roller Bearings

  • Increases effective load span to improve life
  • Main bearing failure is due to over-greasing
  • Pumping action of taper rollers discharges grease to the outside, preventing ingress of slurry or over greasing of bearing cartridge



The gravelMAX Casing is designed for minimum slurry turbulence and even wear. Includes integral wear ring, carrier, and adjustment screws for on-line adjustment and elimination of suction side recirculation.

Wear Ring

The adjustable wear ring assembly to permit closing of suction side impeller clearance during operation. This reduces slurry recirculation and lowers pressure at the suction area, thereby maintaining flow and reducing wear. 


The imperller is designed for high slurry efficiency and hydraulic performance. Machined surface at the eye for wear ring adjustment and high expelling vanes.


(Dependent on pump size), these are designed for close clearance at the back. Matching full impeller diameter and profile for close operating clearance. 

Wear Parts

Designed hydraulically to wear evenly. Constructed of high chrome at 680/720 Brinell hardness. 

Power Frame

Heavy duty cast iron pedestal with external bearing assembly adjustment mechanism. Drilled for overhead motor mounting assembly. 

Bearing Assembly

Heavy duty shaft and indirect fitted taper roller bearings rated at 100,000 hrs B-10 life minimum. Bearing arrangement designed to prevent over greasing and ingress of slurry. 



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