Krebs gMAX Hydrocyclones


Krebs gMAX Hydrocyclones

FLSmidth Krebs gMAX® cyclones provide finer, sharper particle separations at high capacities.

Inlet Head

Krebs gMAX® cyclone inlet has an outer wall involute design entrance that pre-classifies the feed solids prior to entering the main body of the cyclone. The upper part of the gMAX also includes a vortex finder and top cover plate liner design.
The Krebs gMAX®  inlet head results 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 the time between complete cyclone repair / rebuilds.

What is the difference between Hydrocyclones and Separators?

FLSmidth Krebs is the world leader in Hydrocyclones and Separator design and implementation. The terms ‘separator’ and ‘hydrocyclone’ describe the same general type of solids/liquid separation device. While the term separator is often used to describe both types of equipment, there is a technical difference between the two.
A hydrocyclone, also known as a ‘Cyclone’, is a centrifugal device with no moving parts. It can be used to concentrate slurries, to classify solids in liquid suspensions, to de-grit liquids and to wash solids. It is frequently used as a protection or pre-treatment device to improve the performance or decrease the cost of downstream equipment such as centrifuges, filters, and screens. Cyclones are also used in conjunction with thickeners, clarifiers, and strainers.
A ‘separator’ is used primarily in a closed system that is under high pressure, or where very fine separations are not required where liquid loss must be minimized, or where the solids loading is low. A separator is often referred to as a desander.
On the other hand, a hydrocyclone can perform ultrafine separations and handle large volume feedstreams with high solids loading.

Krebs gMAX ® Hydrocyclone

Hydrocyclones concentrate solids in liquid suspension or classify solids at a desired particle size. They produce a continuous overflow stream containing the fine solids and a continuous  underflow stream containing the coarse solids.

Typical applicationsof the gMAX Hydrocyclone include:

  • Separating coke particle from water or hot oil in refineries and petrochemical plants
  • Concentrating salt crystals in the chloralkali process
  • Classifying limestone and thickening gypsum slurries in FGD systems at coal fired power plants
  • Concentrating solids upstream of centrifuges in chemical processes


KREBS gMAX Cyclones Applications in Industry

Sewage & Waste Water Treatment:

Krebs hydrocyclones are used extensively in sewage treatment plants to remove grit, sand and other inorganic solids from the primary clarifier or grit chamber underflow. Hydrocyclones are more efficient and cost less than gravity sedimentation systems.  Debris such as bottle caps, plastic bottles, metal fragments, wood slivers, and other inorganic objects found in the raw sewage cause abrasive wear on process equipment and settle out in the digester. Debris can lead to shutting down operations.

Food Washing and Food Processing Applications:

Fruits and Vegetables harvested with machines have more dirt, grit.  When washed the girt and dirt can clog the circuit system. Our Cyclones prevent downtime by removing the grit and dirt from the water and recycling the water through the system.  This saves time and water.

Scrubber Recycle Systems:

FLSmidth Krebs gMAX cyclones can be used for removing solids from scrubber effluent. By separating the solids, the liquid can be sent to the spray nozzles in the scrubber. The removal of the solids prevents the nozzles from plugging and reduces wear on the nozzles. The piping for the spray nozzles also is protected.

Pulp and Paper:

FLSmidth Krebs offers high density stock cleaners as an ideal and effective methods to separate debris in pulp and paper industries. Krebs high density stock cleaners (hydrocyclones) can be used in Primary stock and severely abrasive and corrosive, secondary stock processes. Krebs  hydrocyclones are also designed to withstand corrosion, high temperatures, and heavy loads of abrasive materials such as glass, staples, and wire. Krebs supplies over 100 Pulp & Paper Mills in North America a cost effective solution to remove glass, staples, wires, and other debris from their process.

There are two basic functions of a hydrocyclones in paper pulp plants: To continuously remove fine sands from paper pulp, typically in multiple stages, or to intermittently clean the larger reject material and discharge it intermittently to minimize fiber loss. In both Kraft pulping facilities and recycled fiber mills, contaminants can easily be separated from the usable pulp prior to other screening equipment, greatly increasing the wear life of the screen baskets and other equipment. Materials of construction can be specified so that cleaner sections subject to more severe wear can be fitted with ceramic liners, while those less subject to wear can be fitted with urethane or nitrile rubber.


  • Hard Rock Mining (copper, gold, silver, zinc, iron ore)
  • Coal
  • Phosphates & Potash
  • Aggregates & Sand
  • Oil Sands

Power, Industrial & Water Treatment

  • FGD (Flue Gas Desulfurization) – Gypsum Dewatering, Limestone Separation
  • Automotive Plant
  • Municipal Sewage & Waste Water Treatment
  • Municipal Potable Water Treatment
  • Chemical
  • Pulp & Paper Process
  • Food & Beverage
  • Gas Scrubber Recycle Systems
  • Plant Intake Water
  • Fiberglass
  • Salt Water Applications

Other Applications and Processes

  • Soil Remediation
  • Elutriation
  • Sand recovery
  • Desliming Processes
  • Thickening
  • Dairy


KREBS gmax cutaway gmax cyclones for mining thomson process equipment and engineering ltd



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