Improved Screening Improved Refining Improved stock Preperation Improved Approach Flow Outsourced Manufacturing

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GHC2™ Screen Rotor

Not revolutionary, but evolutionary is a good description of this patent-pending new rotor.
Energy savings of 30-50% are possible.

GHC2™ screen rotor (upflow screen)

We took our bestselling rotor - the GHC™ -- and made it better.

Over 1,800 GHC rotors have been sold worldwide for a wide range of screening applications. The basis for the GHC's success was its ability to increase capacity and/or reduce power consumption significantly compared to an OEM rotor.

The breakthrough for the GHC2 came when the idea for the PowerWave™ element evolved. The PowerWave has a unique waveform surface along its leading edge which accelerates the pulp suspension as it passes over. By increasing the strength of the suction pulse in the screen, PowerWave excels at clearing the screen cylinder's slots or holes. This leads to impressive screening results.

PowerWave™ Element

This computer rendering shows the very high fluid activity created by the PowerWave element on the leading edge. This improves screening efficiency and keeps the screen cylinder apertures clean.

Micro-vortices are formed which reduce the accumulation of fibers in the screen's apertures.  This allows a mill to reduce slot or hole sizes to improve screening efficiency.  This lowers the power required to operate the screen.

GHC2 Benefits:

Increased capacity.  The GHC2 rotor, when compared to the GHC, can increase throughput by about 20% at the same rotor tip speed.  This is due to its ability to handle high slot velocities and higher feed consistencies (reducing thickening factor and pressure differential).

Reduced power consumption.  The GHC2 reduces energy consumption by about 30% over the award-winning GHC, and by about 50% over conventional OEM rotors, by enabling a reduction in the rotor tip speed at a given throughput.

Improved screening efficiency.  The GHC2 boosts screening efficiency by allowing the use of smaller apertures (slots or holes) at a given rotor tip speed.



The pulp screening test loop at Aikawa's Technical Center where
the GHC2 was thoroughly tested before being released for mill trials.

All AFT products are based on sound science, backed by real-world application.  The GHC2 was extensively tested – first at the Aikawa Testing Centre in Japan and then in several different mills to see how it performed in the real world.  The results were quite impressive.