Key Benefits

  • Improve efficiency and performance
  • Reliable, automatic operation
  • Reduce operating costs
  • Low upfront costs

Dewater, deslime, desand, wash and stack


Our KREBS CycloStack attachment is designed for use in solids dewatering applications, and can be attached to the bottom of a standard cyclone to minimise the moisture content in the cyclone underflow. The attachment provides a low-cost method for automatically controlling the dewatering and discharge concentration of the cyclone underflow, allowing direct discharge of the underflow onto a conveyor belt or into a pile. This occurs even with fluctuating feed conditions.

KREBS® CycloStack

The CycloStack consists of a urethane flap that opens when solids are present, allowing the solids to discharge while retaining water in the cyclone. With the help of the vacuum caused by the siphon created in the overflow pipe, the CycloStack closes if there are no solids present.


The device improves hydrocyclone efficiency by constantly “adjusting” its apex diameter, as it virtually eliminates plugging.  It is a low-cost device that allows attention-free operation.

For more details how our CycloStack works scroll down to Product Features.

KREBS® CycloWash

The KREBS CycloWash is a patented, ancillary elutriation (cleaning) device that markedly improves the desliming performance of standard cyclones, as it also reduces operating costs.


For desliming purposes, normal classification takes place in the upper portion of a cyclone; this can be thought of as the first stage of desliming. The CycloWash, located in the lower/apex section of the hydrocyclone, injects water into the cyclone, and the injection water displaces the fines-laden water in the partially thickened underflow pulp. The result, essentially, is a second stage of classification taking place, where the displaced water with fines joins the normal cyclone overflow. The coarse solids are thickened, and they discharge through the apex orifice as a thoroughly deslimed underflow.


Because the device is inexpensive, easy to install and relatively little injection water is needed for effective slimes displacement, the CycloWash offers a low-cost means for improving cyclonic classification.


Better together

The CycloWash and CycloStack can be used in combination to provide both maximal desliming and dewatering of cyclone underflow product. The CycloWash/CycloStack combination also can be used to wash and thicken both end products and tailings.

Cyclone manifold system with CycloStack and CycloWash used together to maximize desliming or dewatering of cyclone underflow product.

A low-cost way to enhance your dewatering and desliming cyclones

Improve efficiency and performance
The CycloStack minimises moisture content in the cyclone underflow, and constantly acts to "adjust" the apex diameter for better hydrocyclone efficiency. The CycloWash helps to improve cyclonic classification.
Reliable, attention-free operation
The CycloStack and CycloWash devices dependably perform shift after shift, with virtually no operator attention.
Reduce operating costs
Attention-free operation allows personnel to focus on other areas of the plant. Elimination of plugging reduces the risk of unplanned downtime. Better cyclone performance translates to reduced costs overall.
Low upfront costs
CycloStack and CycloWash are relatively inexpensive items that attach to standard cyclones, improving their performance.

Boost hydrocyclone performance - automatically

CycloStack features

The CycloStack attaches to the bottom of a standard cyclone and overflow pipe/siphon control assembly for use in solids dewatering applications. As it minimises the moisture content in the hydrocyclone underflow, it provides a low-cost way to automatically control its dewatering and discharge concentration. The CycloStack allows direct discharge of hydrocyclone underflow onto a conveyor belt or into a pile.


Cyclones with the CycloStack attachment can be used alone, on a manifold with multiple cyclones or in combination with screens, screw classifiers, hydro-separators/hydrosizers or gravity settlers to classify and separate a wide variety of sand and gravel products.


CycloWash features

CycloWash is used for washing of solids for separation of soluble values or contaminants. The CycloWash permits the injection of elutriation (cleaning) liquor or water into the lower section of the hydrocyclone, so that fine particles in the underflow or solubles in the liquid phase of the hydrocyclone feed stream can be displaced and discharged with the hydrocyclone overflow.


The injection liquid serves as the displacement agent of fine particles that are entrained in the underflow pulp. With creation of a “secondary classification” within the hydrocyclone, displaced fines rise within the centre of the hydrocyclone, joining the overflow pulp. The coarse solids are thickened and discharged through the apex as a well-deslimed underflow.


For separation of soluble values, or contaminants, fresh injection liquor can be used in the CycloWash as a washing agent to help displace liquid-containing solubles with the hydrocyclone overflow.


The CycloWash device can be installed on single cyclones or manifold systems.

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