The Semolina purifier is inserted into the milling diagram of soft wheat, hard wheat and corn for cleaning and classification of semolina obtained by the grinding process. The 24 sieves conveniently equipped are crossed over by the adjustable air flow generated by suction ventilators, allowing for the selection and qualification of the products according to granulometry and specific weight.
Semolina, the new line of purification machines by Golfetto Sangati, is the result of 20 years of technological evolution and improvements that have led to the definition of the most requested product on the market.
Semolina is available in 2 different models: the traditional HP50 and the innovative HP55.
• High-quality materials
• Reduced noise level
• High performance
• Reduced maintenance
• Long durability
• Absolute precision
• Safe use
• Hygienic safety
For every machine, the Semolina power supply adjust 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 springtensioned "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.
Evolved from the proven Semolina HP50, the Golfetto Sangati project team developed a 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.
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. 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.