KREBS vMAX™ Vertical Cantilever Pump

The new extreme duty vertical cantilever pump for sump and process duties

FLSmidth Krebs vMAX vertical cantilever pump


  • Reliable continuous operation when slurry is available
  • No shaft deflection during loss of prime due to run back of slurry down discharge pipe
  • No impeller adjustments required
  • No water flush
  • No shutdown due to clogging
  • No sump level controls
  • Less downtime
  • Simple maintenance


The new “vMAX™” line of vertical cantilever hard metal pumps has been developed for conventional clean up sump duties and process duties that require reduced degradation of pumped solids.


The casing is configured for bottom suction only to prevent build up of solids in the bottom of the sump. Leakage from the back of the casing, through the life of the pump, is prevented by high performance expelling vanes on the back shroud of the impeller.


The suction entry is flared to promote prerotation of the slurry prior to entry into the pump and scours the floor of the sump to keep it clean.


An oversized surface area suction strainer prevents premature blinding to increase operational life.


The recessed impeller allows slurry to run back down the discharge pipe with minimal impact on the impeller when the slurry level drops below the suction. The pump can operate without level control if necessary.


The fully recessed torque flow cup style impeller design permits passing of pipe size solids and operation without the need for sump level control.  


Pumps sizes are available from 2” (50mm) to 6” (150mm), in submerged lengths of 5’ (1.5m), 6’ (1.8m) and 7’ (2.1m) with heads up to 120’ (36.5m).


FLSmidth Krebs, Inc.

5505 W. Gillette Rd.

Tucson, AZ 85743-9501 U.S.A


Phone: +1-520-744-8200

Fax: +1-520-744-8300


vMAX vertical cantilever sump pumps are designed for continuous abrasive slurry service in sumps without the need for sump level control or submerged bearings. The following are all of our vMAX design features:


·         Cantilever design has no stuffing

box seal, no submerged bearings.

·         Available in 2”, 3”, 4” and 6”

sizes for setting depths of 1.4m,

1.8m, 2.1m without submerged


·         Rigid 1040 steel shaft with large

bearing span to reduce shaft

deflection and bearing loads.

·         27% chrome iron wear parts

with 680 BHN minimum


·         Casing has integral discharge

elbow to reduce localized wear.

·         Induced flow 8-vane impeller is

recessed out of casing flow path

to pass extra large solids, rags and

fibrous materials.

·         Separate suction wear plate with

flared suction entry for reduced

hydraulic entry loss.

·         Oversized suction strainer to

permit large solids passing and to

prevent blinding by plastic or rags.

·         Will operate without automatic

level controls, due to recessed

impeller that will not be impacted

by return rush of slurry.

·         No impeller adjustment required.

Oversize diameter expelling vanes

on back shroud of the impeller

prevent leakage to atmosphere.

·         Drive end bearing is fixed

clearance twin Timken taper roller

for axial thrust and impeller end

bearing is parallel roller for radial


·        Grease lubricated bearings.

·         Integral mounting plate for

supporting pump above sump.

·        Steel discharge pipe extends

above liquid level and is fixed to

the mounting plate for access to

customer piping.

·        Adjustable motor mount integral

to power frame assembly with vee

belt drive tensioning capability.

·         Lifting yoke provided for crane

hook suspension over sump.