SWITZERLAND – Buhler Group, Uzwil-based technology company for plant and equipment, has introduced the Vertical Pearler Osiris MTPA, an equipment with an innovative and sturdy design used in pearling to produce purer and almost speck-free semolina, reported World Grain.

According to Buhler, the Osiris MTPA, to be used in pearling the outermost hull layers from grain result in more efficient pearling compared to other machines to date due to revised drive concept and diamond abrasion medium.

The process achieves improved semolina quality plus lower portion of hulls resulting in higher, pure semolina yields.

The machine is automatically controlled and can be operated directly or from the command room while the housing is casted and the wear parts are easily accessible by opening the aspiration channel flap, said Buhler.

As opposed to conventional grain pearling machines usually using abrasion stones as grinders which wear and can break off, the new Vertical Pearler Osiris MTPA uses synthetically produced diamonds as a grinding medium, as diamond is known to be the hardest abrasive.

Grinding wheels on the Osiris MTPA are made of steel coated with diamond grains through a galvanizing process, making them resistant to higher pressures and guarantees lifetime constant outer diameter.

Buhler said the coating also makes it possible to optimize the circumferential speed, which increases the pearling effect.

The diamond coated rotor is directly driven by the main motor, eliminating the costs and maintenance associated with drive also, reducing on possible contamination.

“The new type of construction and new abrasion medium can save up to 20% in energy costs compared to other grain pearlers with the same throughput and pearling performance,” said the company.

“A new aspiration system creates even aspiration across the complete height of the rotor.

Fresh air is drawn in directly through the grinding rotor creating optimal removal of the grinding flour.

The new pearler can achieve an index performance of 8 tons per hour at an 8% pearling degree when processing durum wheat.”