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Krebs Pumps
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slurryMAX Pump
 
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NF End Suction Range
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DL/DB Model
DV Vertical Spindle
 

 

 
KREBS millMAX centrifugal slurry pump

millMAX centrifugal slurry pump

millMax
millMAX Brochure

Benefits

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

In most established millMAX™ installations, wear life of parts has been even and in the majority, overall wear life has generally improved by 50% to 100%. This increase in wear life is achieved together with a reduction in power, generally in the 10% to 20% or greater range.

The reduction in power can then be taken as a cost savings, or through additional pumping capacity with the same installed motor.

With the millMAX™ Hybrid Suction Sealing System, the front clearance is adjusted while the pump is running, and takes only five minutes to perform. This clearance is adjusted normally six to eight times throughout the life of the wet end parts.

   
  Design
  Casing
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
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.
  Impeller
Designed for high slurry efficiency and hydraulic performance. Machined surface at the eye for wear ring adjustment and high expelling vanes.
 

Backliner
Dependent on pump size

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.
  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.

   
KREBS gravelMAX centrifugal slurry pump

gravelMax centrifugal slurry pump

gravelmax
gravelMAX Brochure

Benefits

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

 In most established millMAX™ installations, wear life of parts has been even and in the majority, overall wear life has generally improved by 50% to 100%. This increase in wear life is achieved together with a reduction in power, generally in the 10% to 20% or greater range.

The reduction in power can then be taken as a cost savings, or through additional pumping capacity with the same installed motor.

With the millMAX™ Hybrid Suction Sealing System, the front clearance is adjusted while the pump is running, and takes only five minutes to perform. This clearance is adjusted normally six to eight times throughout the life of the wet end parts.

   
  Design
  Casing
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
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.
  Impeller
Designed for high slurry efficiency and hydraulic performance. Machined surface at the eye for wear ring adjustment and high expelling vanes.
 

Backliner
Dependent on pump size

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.
  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.

   
KREBS vMAX™ Vertical Cantilever Pump

KREBS vMAX™ Vertical Cantilever Pump

vMAX
vMAX Brochure

Benefits
  • 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 pre rotation 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).

  Design
 

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 bearings.
    Rigid 1040 steel shaft with large bearing span to reduce shaft deflection and bearing loads.
  • 27% chrome iron wear parts with 680 BHN minimum hardness.
  • 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 thrust.
  • 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.
     
KREBS slurryMAX™ Pump

slurrymax

vMAX
slurryMAX Brochure

Benefits
  • Increased Wear Life
  • Lower Power Consumption
  • On-line Wear Clearance Adjustment
  • Increased Mill Throughput
  • More Consistent Hydrocyclone Separation
  • Less Downtime

Following the dramatic success of the millMAX ™ metal slurry pump, FLSmidth Krebs has incorporated the patented features into a new slurryMAX ™ rubber lined pump product range.

The patented feature has an externally adjustable wear ring that closes the suction side impeller clearance between the suction liner and the eye of the impeller. This clearance eliminates the problem conventional rubber lined pumps experience - that of pressure pulsations caused by the close proximity of the rotating raised expelling vanes to the suction liner, necessary to maintain flow, and subsequently generating heat in the liner and rubber devulcanization failure.

The ability to control the suction side clearance reduces the hydraulic recirculation and therefore contributes to maintaining the design fl own over the life of the pump, increasing the life of the impeller. The extra-thick rubber lining has rigid reinforcement to preventcollapse onto the rotating impeller under upset vacuum conditions. Impellers are oversized in diameter and available in metal or elastomers. High pressure casings are available for applications requiring multiple pumps in series. Pump sizes are available from 2” (50mm) to 16” (400mm).

 

  Design
 

Metal impeller is standard.

Design is suitable for molded rubber at a later date.

The casing is constructed of tough spheroidal graphite iron. Casing and suction inlet are lined with natural rubber.

Impeller and other wet-end components constructed of highly abrasion-resistant high-chrome white iron with a Brinell hardness of 680 to 720.

High-chrome impeller is resistant to “tramp” metals and is capable of higher tip speeds.

Radial impeller vanes both “clear” solids and reduce pressure at suction-side clearance - reducing solids grinding and recirculation respectively.

Tight back liner clearance maximizes packing and shaft sleeve life - normally this clearance is opened up as impeller wears and needs adjusting.

Reverse taper roller bearings purge grease to the outside – preventing ingress of slurry and over-greasing of bearing cartridge.

Tight clearance between wear ring and impeller reduces suction-side slurry recirculation by up to 95%.Pumps feature a patented, adjustable, suction-side, sealing system that features a wear ring that runs against the machined face of the impeller near the eye.

Wear ring can be adjusted up to eight times throughout the life of the wet-end parts and is adjusted while the pump is running.

Generous clearance between impeller and suction liner limit the cyclical wear of the rubber associated with the trapping of solids between the liner and the impeller.This also provents hysterisis.

     
KREBS gMAX® Cyclones

gmax cyclone

vMAX
gMAX Cyclone Brochure

 

cyclone cutaway
Cyclone Cutaway Brochure

 

Benefits
  • Finer, sharper particle separations at high capacities.
  • Fewer cyclones needed for optimal performance.
  • Available in sizes ranging from 2 to 33 inch in diameter with 1 inch thick replaceable liners.
  • Operates at higher feed densities at the same separation size
  • Operates at lower cyclone inlet pressure.
  • Can be retrofitted into existing installations.

    The Krebs gMAX is a new generation of cyclone, re-engineered from apex to vortex finder. The Krebs gMAX cyclone has the capability to produce finer and sharper particle separations using large, high capacity cyclones.

    The gMAX cyclone performance level was formerly only achievable using many small diameter cyclones, at a much higher capital cost.

    The gMAX cyclone design includes new modern apex, cone, and inlet head designs that feature performance enhancing benefits as a well as one inch thick elastomer or ceramic liners for increased wear life. The cyclone inlet and cylindrical sections have been modified to minimize turbulence and wear, but still have the capability to operate at much higher capacities than our competitor's cyclones.

    Through extensive testing, the Krebs gMAX cyclone performance has been proven in a wide variety of applications including:

  • Copper Ore
  • Coal
  • Iron Ore
  • Phosphate
  • Gold
  • Molybdenum
  • Potash
  Design
 

Inlet Head Design

The Krebs gMAX inlet has improved upon the Krebs involute feed inlet that had been the state-of-the-art in hydrocyclones for over 40 years. The outer wall involute design entrance pre-classifies the feed solids prior to entering the main body of the cyclone. The upper part of the gMAX also includes an improved vortex finder and top cover plate liner design. These improvements to the inlet head result in less misplacement of coarse material to the overflow and dramatically increased wear life. This longer wear life for the gMAX inlet, combined with premium ceramics in the lower parts of the cyclone, will greatly increase complete cyclone repair frequency.

gMAX Inlet

The contoured, ramped inlet pre-classifies the slurry, reducing turbulence.

Reduced turbulence minimizes course solids bypass to overflow.

Cones

Through the use of CFD analysis, FLSmidth Krebs has designed the gMAX cyclone with sharper upper cones followed by longer angled lower cones. This combination maximizes tangential velocity in the upper part of the cyclone. It then provides a long residence time in the critical separation zones in the lower part of the cyclone. This results in a substantially finer separation with fewer fines in the underflow.

Apex

The KREBS gMAX apex maintains the same internal angle as the cone section above it. This results in high underflow density without driving coarse material to the overflow.

 

     
KREBS Heavy Media Cyclones

HM cyclones

vMAX
Heavy Media Cyclone Brochure

Benefits
  • Broad size range.
  • Capacities from 58 STPH to 985 STPH.
  • A relatively wide range of coal sizes can be cleaned in a wide range of cyclone sizes.
  • Several ceramic lining options from 1" to 1.5" thickness are available to optimize wear life .
  • Extremely efficient cleaning device using finely ground (-325 mesh) magnetite and water as the "media".

    Krebs Heavy Media Hydrocyclones look like classifying hydrocyclones but they are made specifically to clean coal. A gravimetric separation takes place due to the buoyancy effect of the media forcing the lighter coal solids to the center of the hydrocyclone where they are transported upward and through the vortex finder. The dense mineral matter spirals toward the apex and exits through that orifice.

  Design
 
  • Media density primarily determines separating gravity.
  • 1" to 1.5" ceramic lining is critical since high ash "refuse" is very abrasive.
  • Pressure should be kept low to mitigate classification of magnetite particles.
  • Heavy Media Cyclones are usually operated in a near-horizontal orientation allowing for large apex sizes to be used for refuse removal.
  • Cyclones 30" diameter and larger utilize a patented ceramic "acceleration wedge" to adjust capacity and G-forces.
     

 

KREBS Technequip™ Knife Gate Valve

techniquip valve

vMAX
Technequip Knife Gate Valve Brochure

Overview

Slurry Knife Gate Valve

Technequip knife gate valves are designed specifically for abrasive slurry applications.

Sleeves
Massive elastomer sleeves are longer than valve bodies, and compression between retainer flanges or companion flanges provides a bubble tight seal. It eliminates the packing gland and provides wear resistance.

Seat
The sleeve design allows for an unobstructed full port opening and bi-directional flow.

Open Body
An open body allows for particles to be flushed away from the gate path.

 

Benefit
  • Machined gate guides guarantee parallel path.
  • Flurocarbon coated gate rejects buildup of foreign material, reducing sleeve wear
  • Fluorocarbon coated gate reduces the coefficient of friction, allowing the valve to open and close more quickly.
  • Composite Tube.
  • Reed Switches .
  • IP 68 Enclosure Ring magnet allows for easy retrofit of reed switches.
  • Corrosion Resistance:

  • Each part individually epoxy top coated, then assembled, including air cylinders.
  • Zinc-Nickel dichromate plated hardware.
  • Gate clevis machined from 17-4 PH stainless steel bar stock.
  • Air cylinders are epoxy coated.
Design
  • Internal Ring Magnet (Air cylinder valves)
  • Dust Boot
  • Stainless Steel Gate Clevis
  • Stainless Steel Gate
  • Packingless Design
  • Epoxy-coated Cast Ductile Iron Body
  • Replaceable Wear Sleeves
  • Retainer Flanges
  • Open Body Design

Applications

  • Mining and mineral processing
  • Mineral Sands
  • Cement
  • Sand and Gravel
  • Coal
  • Phosphate / Ash
  • Alumina
  • Power
  • Pulp and Paper
  • Chemical
  • General industrial

Features

Standard Features:

  • Available in sizes from 3" through 30"
  • Fluorocarbon coated 316L stainless steel gate
  • Zinc-nickel plated hardware
  • Epoxy paint
  • Bi-directional operation
  • No packing to bind the gate
  • CNC machined gate guide & body
  • Low durometer seats for maximum erosion protection
  • ANSI B16.5 Class 150 flange bolt pattern
  • Ring magnet on all composite air cylinders
  • Valve size cast into valve body
  • Frames can accept any type of actuator

Optional Features:

  • Actuator options: air cylinder /handwheel/bevel gear/hydraulic /electric
  • Seat material options: pure gum rubber/neoprene/chlorobutyl/EPDM
  • Cylinder mounted proximity switches (non-contacting)
  • Splash guard with 2 NFPT ports
  • Solenoid valves with manual override and power indication LED
  • Lock outs
  • Multiple elastomer options to suit customer's specific applications, including pure gum rubber, chlorobutyl, neoprene, nitrile, and EPDM

 

     
CURO NF End Suction Range

CURO NF

PDF Pamphlet

Details
These locally manufactured pumps have been designed and are constructed from materials suited for most high flow and head applications.

The range consists of eleven models, all of which are available in different sizes of inlet and outlet branches.

Generally this range of pumps is used when direct coupling is required to three phase motors running at 4 pole motor speed (approximately 1480 RPM).

However, they are suitable for operations at various other shaft speeds e.g. when direct coupled to diesel engines or when driven via speed reduction gearboxes, or belt driven.

This range of pumps has been designed to cover heads varying from approximately 15 meters to 90 meters, and flows from 150m³/hour to 1600m³/hour.

All pumps are of robust construction. The diameter of the pump drive shaft is 60mm.

These horizontal end suction centrifugal pumps are of the back pull out design. Pump rotation is clockwise when viewed from the drive end.

All end suction pumps are fitted with grease lubricated ball and angular contact bearings.

Standard materials of construction are cast iron casing components, cast iron or bronze impellers and high tensile steel shafts.

CURO Multi Stage Model

3 stage pump

PDF Pamphlet

Details

These locally manufactured pumps have been designed and are constructed from materials suitable for most high pressure applications.

The range consists of the LTF and LTS models, all of which are available in different sizes of inlet and outlet branches with varying number of stages.

Generally the LTF models are used when direct coupling is required to three phase motors running at 2 pole motor speed (approximately 2960 RPM) and the LTS models are used when direct coupling  is required to three phase motors running at 4 pole motor speeds (approximately 1480 RPM).

However, both models are suitable for operations at various other shaft speeds e.g. when direct coupled to diesel engines or when driven via speed reduction gearboxes.

The LTF and LTS models are designed to cover heads varying from approximately 40 meters to 700 meters, flows from 2 liter/sec to 250 liter/sec.

These horizontal, high pressure centrifugal pumps are of the multi-ring section design. All pumps are built up from any number of stages held between the Suction Cover and Delivery Cover by Body Bolts. Sealing of casing components is by means of ‘0’ Rings. Pump rotation is clockwise when viewed from the drive end.

The LTF and LTS pumps are either fitted with grease lubricated ball bearings or roller bearings and thrust discs.

Standard materials of construction for the LTF and LTS pumps are cast iron casing components, cast iron or bronze impellers, cast iron diffusers and return channels and high tensile steel shafts.

CURO DL / DB Model

CURO DL/DB

dl/db

Details

These locally manufactured pumps, manufactured to DIN Standard 24255, are constructed from materials suitable for heads up to 100 meters and capacities up to 500m³/HR at temperatures from -10°C to 105°C.

The range consists of 28 models, all of which are available in different sizes of inlet and outlet branches.

There are two speeds at which the DL/DB range operate, 2960 RPM (2 Pole) and 1480 RPM (4 Pole). The selection of pump is dependent on maximum efficiency for the required problem.

However, they are suitable for operation at various other shaft speeds, for example, when direct coupled to diesel engines or when driven by speed reduction gearboxes or belt driven.

This range of pumps has been designed to manage heads from 2.5 meters through to 100 meters, and flows from 4m³/HR to 500m³/HR.

Materials of construction range from Cast Iron/Cast Iron, Cast Iron/Bronze, and Stainless Steel/Stainless Steel. Heavy duty bearing Brackets are also available for diesel driven pump sets.

Standard arrangement for the DL range is a long-coupled, back pull-out, canter-lever type bearing bracket, or one can have a heavy duty type HSR bearing pedestal. The arrangement for the DB is a close-coupled compact pump.

All DL/DB Series Pumps are grease lubricated and the shaft sealing is a packed gland or mechanical seal.

 
CURO DV Vertical Spindle

spindle

dl/db

Details

The DV Vertical Spindle Range is capable of producing flows up to 600 m3/hr and heads up to 100 meters. This range can operate in temperatures of - 10°C to 105°C.

The Standard materials used in construction are Cast Iron/ Cast Iron, Cast Iron/ Bronze and Stainless Steel/Stainless Steel.

The Shafts run on vesconite bearings and driven by grease lubricated bearings, this is standard in the DV Range.

DV – Direct Drive Vertical Spindle Pump, that operates within a sump for dewatering applications

APPLICATIONS:

  • Sump Pumps
  • Wash Down Pumps
  • Drain Pumps
  • Any Submersible Application

These Centrifugal End Suction Pumps are locally manufactured to the DIN Standard 24255.

 
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