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SEMOLINA - Purifier

The Semolina line is the result of more than 20 years of combined technological evolution and improvements that have led to the definition of the most required product on the market. It is available in 3 different models: HP50, HP50S and HP55.

Seminola HP55 & HP 50

Designed for Beauty

Particular attention has been given to the design of Semolina, utilizing durable and high quality materials, yet maintaining a simple and minimal profile.

A history of professionalism

Semolina's design is born from several years of combined experience in mill designing around the world, and from the valuable collaboration with our clients, in order to provide a high performing machine that features simplicity and reliability. During the operation dust leakage from the machine is eliminated, thus being in compliance with all security's regulations in areas considered at high risk of dust explosion as in mills.

Simple Operation

For every machine, Semolina power supply adjusts itself according to the particle size of the worked product, through a designated grid opening or closing which operates as a distributor at the entrance of the first frame. Once the machine stops, this type of power supply allows for a complete product purging and for a perfect distribution of the product on the machine, which is essential for the following phase. 

The product sorting is accomplished through 12 sieves arranged in overlapping rows and it is then collected by two brushed stainless steel conveyors. The sieves are made of extruded aluminum alloy 6060 and are food-grade. The sieve covers may be tensioned with a screw system, or, as in the case for the plansifter frames, the screens can be glued by means of appropriate adhesives. Sieve cleaning may be done with balls or brushes. 

The removal of the sieve frames is quick and simple by using a spring tensioned turn and release handle. The diversion of the product to the desired conveyor occurs through diverters. The by-products can be managed in a single stream or collected utilizing 2x2 manual regulators.

Semolina Purifier

The Flyback patent

The entire Semolina series of purifiers are equipped with the patented Flyback® feature. This device allows the product full exposure to the lower row of sieves, which maximizes the efficiency of the machine.

Solid foundations

Semolina - Vibratory motors

The steel frame holds the two sections of the Semolina - Purifier mounted on shock absorbers and equipped with two large windows for inspection. The vibrating action is obtained through two vibratory motors. All parts in contact with the product are free of painted surfaces and are made of 60/60 aluminum alloy or stainless steel. The Semolina assembly is made using high quality stainless steel bolts and no welding is used in the components assembly.

Key Features

• High quality materials;
• Reduced noise level;
• High performance;
• Reduced maintenance;
• Long durability;
• Absolute precision; 
• Safe use;
• Hygienic safety.

Soft Wheat Milling Plant - Molino Naldoni (Italia)

SEMOLINA - Purifier HP55

The next generation purifier with innovative features that place it at the top of its category for the accuracy in the classification of semolina, extraction efficiency, productive capacity and functional efficiency.

Product falls in the feeding box, where it is evenly distributed, in all the sieves’ width. An aspiration current that runs through the sieving area, favors the stratification and the product selection. The new sieving dimensions of 55cm x 55cm guarantee a 23% increase in sieving area. 

The product, advancing thanks to a vibrating movement and the shaker pre dryer inclination, is divided in one part that runs through the sieves and one that is called waste and it reaches the chute. The chute inside the machine contains a series of mobile flaps, which allow to differentiate the waste destination, according to the diagram needs. Considering that the classification process of semolina occurs primarily vertically by passing quickly through the sieves, our design team decided to modify the positioning of the sieve frames normally used in traditional purifiers to take advantage of this concept

The semolina passed through the sieves can be directed to one of the chutes through the overturnable flaps, allowing for product sampling without interfering with the aspiration process. The air going through the shaker pre-dryer sides passes in the sieves where the product runs and the air is regulated activating the valve located on the air intake.

In order to ease the washing process, all the parts in contact with the product are in stainless-steel or in painted steel for food contact, guaranteeing complete cleaning. The external part is composed of anodized aluminum extrusions with double wall in order to guarantee thermal and acoustic isolation. Its chemical composition is specific to enable food contact without any contamination. In addition, the base stand and the vibrating bodies are specifically designed to facilitate the washing process, since the latter guarantees no product stagnation.

Semolina HP55 - Sieves

The machine compact dimensions guarantee an optimal plant space management, favoring the installation in already existing mills. Moreover, the small space between the loading and unloading areas guarantees a reduced plant footprint. The HP55 does not feature linking areas between the sieved products and external environment, avoiding any product contamination.  By configuring the purifier to have four rows of superimposed sieves, each composed of three sieves, the separation efficiency of the semolina is considerably more precise. Furthermore, the purification surface of the HP55 has been increased by 10% due to utilizing 550mm square sieves. Despite the increase of the sifting surface, the newly designed configuration of the sieves allowed the overall footprint of the machine to be reduced by 12%.  In addition to saving valuable floor space within the mill, the reduction in size contributed to reducing the energy requirement for the eccentric movement of the machine.

Given the different internal distribution of the sieves and the reduction in machine length, the air flow distribution is much more uniform and more easily controlled across the length of the machine. To maximize the purification efficiency of the semolina, there are four air-flow adjustment points per sieve length on the Semolina HP55 which enables the miller to precisely control the air flow and maximize the performance based on the current mill operating conditions.  This allows for an exceptionally high degree of accuracy when purifying the semolina

Machine performance

  • Capacity: 4000 kg/h;
  • Aspiration capacity: 60 m³/1’.

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