Pieralisi Extractor SPI

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The SPI series centrifugal extractors, with their avant-garde technology for two-phase running, extremely high capacity and excellent yields, are a practical demonstration of total efficiency applied to olive oil extraction.


-All parts in contact with the product are made of stainless steel.
-All parts subject to wear and tear (such as scroll, inlet product diffuser and husk outlet bushings) are coated with wear-proof materials.
-Soft starter with variable frequency drive (VFD).
-Electronic control of the bowl speed (rpm) and differential speed of the scroll (models with Rotovariator® / hydraulic variable speed drive - optional).
-Insulation from the ground by means of anti-vibration supports.

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Passion, tradition and innovation. These have been the core values of the Pieralisi Group since 1888, when its first workshop opened in the small town of Monsano. Today, the Pieralisi Group is the world leader in providing state of the art separation solutions using centrifugal force.
Pieralisi systems deliver optimal performance -both for continuous cycle and batch processing -enhancing, on one hand, the quality of the oil, which is even richer in polyphenols and, on the other, making it possible to harness the full potential of the by-products so they can be another source of income for the oil mill.
With Pieralisi Group’s long-standing experience in the industry, it is the only one of its kind able to supply its customers, all over the world, with a turn-key product for the entire olive processing cycle: from leaf removal to washing, to crushing and malaxing, followed by extraction and separation.
The Pieralisi Group continuously invests in innovation. It has filed hundreds of international patent applications (25 are currently active), which embody and demonstrate its commitment to the research and development of new technologies.


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When it comes to extraction, yield is a key factor in the final result. Pieralisi Group stands out for its long-standing success in this area. The ancient method of pressing by means of crushing gave way to the modern centrifuge-based system of extraction with the subsequent introduction of Decanters. These were, in fact, created to ensure that the oil is excellent in terms of yield, throughput and organoleptic quality.

A few years ago, after in-depth studies and meticulous designs, Pieralisi introduced DMF extraction technology, one of the company’s greatest accomplishments, as well as a cutting edge technological solution for the extraction of olive oil.
One advantage of this system is, since there is no need to add water when processing the olive drupes, the efficiency of the yield which remains stable even with unusually large productions.

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This technology, which uses a two-phase system, produces a dehydrated pomace similar to that from a three-phase system which recovers the pulp from the pomace, called “pâté” (i.e. olive paste). In addition to the multiphase innovative technology, Pieralisi has a new range of centrifugal extractors for two and three phase processing which offer:
• high yields
• the need to add only a small amount of water for three-phase processing
• reversibility in two/three phase processing.

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• Pieralisi extractors are all designed to maximise the oil yield which, as a matter of fact, is a key element.
• Electronic control of the bowl speed (rpm) and differential speed of the scroll via the new oil mill control panels.
• All of the parts subject to wear, such as the scroll, product inlet distributor and the pomace discharge bushes are coated with wear protection.
• The scroll in Pieralisi decanters are more durable for olive washing operations and have a unique rake on the back which greatly increases its durability. DMF technology
• Produces a dehydrated pomace similar to what comes out of a three-phase system.
• This technology has the advantages of processing without adding water (two-phase) plus the versatility of a decanter able to operate in either continuous or batch processing mode.
• This makes it possible to recover a certain quantity of pomace - called “pâté” - made up of wet pulp without any traces of kernels directly inside the bowl.
This pâté is ideal for various uses (e.g. soil conditioner, animal feed supplements, a possible ingredient for human consumption, mixed with other biomass for biogas production), thereby turning a by-product to be disposed of into added value for the miller.