Grain cleaning equipment • Grain cleaners

Grain Cleaning Machines

High-quality post-harvest crop processing is the key to profitability in agribusiness, as both the storage duration and the final product value depend on it. The first and most crucial stage in this process is grain cleaning, and grain cleaning machines designed for pre-cleaning and primary cleaning by separating the unprocessed grain mass from foreign impurities—dust, straw, stems, leaves, chaff, weed seeds, soil particles, broken or unripe grain—handle this task well. This process allows for the storage of high-quality material, prevents losses, and significantly increases the grade, and therefore the price, of your harvest.

In Ukraine, the OVS-25 (a heap cleaner for seeds with a productivity of 25 tons per hour) is traditionally used for mobile and effective primary cleaning. It has become a true "gold standard" for many farms, and some farmers consider it the only grain cleaning machine of its kind capable of performing such tasks. Experienced, "old-school" farmers hardly need an explanation of what an OVS-25 is and how it works, but for the new generation of farmers, we will briefly recall its classic principle of operation. The general post-harvest processing consists of three stages: grain is brought from the field, undergoes cleaning, and is put into storage. It is at the second stage that the OVS-25 comes into play. This grain cleaning machine slowly moves along the grain pile (heap), its scraper feeders pick up the unprocessed grain mass, feeding it inside for cleaning, after which the clean grain is discharged at the rear. The OVS-25 uses a two-level cleaning system: first, air separation, where a powerful fan blows light impurities (dust, chaff, straw) out of the grain mass, and then sieve separation, where the material is sorted by size on vibrating sieves (screens), separating all impurities that are larger or smaller than the main grain.

It is this unique combination of functions (self-propulsion, loading, cleaning, and unloading) that made the OVS-25 a truly self-sufficient mobile complex for work on the threshing floor. Thanks to this, it gained such widespread popularity that today the name "OVS" has become a generic term, often used to refer to any self-propelled grain cleaning machine. Undoubtedly, the classic OVS-25 represents an entire era, closely linked with our agricultural sector. Thanks to its simplicity and reliability, this time-tested machine is considered legendary, having served faithfully in thousands of farms to this day. But times are changing, and the demands of modern agribusiness for productivity, cleaning quality, safety, and operator comfort have become much higher. Therefore, the engineering department of Zavod Moroza did not follow the path of blindly copying the OVS-25, but instead initiated the continuous evolutionary development of these grain cleaning machines, taking the classic principle of operation as a basis but cardinally improving every unit, with a general reinforcement of the structure and the addition of modern technological solutions.

Self-Propelled Grain Cleaning Machines OVS-25

In our catalog, you will find both self-propelled grain cleaning machines that provide maximum mobility on the threshing floor, and stationary units designed for integration into existing grain cleaning lines (ZAV). We offer various models with extended discharge for convenient loading of high-sided vehicles, with high-efficiency cyclones for indoor operation, as well as with other unique improvements. Today, Zavod Moroza offers a whole range of modernized self-propelled grain cleaning machines based on the OVS-25, each of which is optimized to solve its own unique tasks:

• OVU-25 "BERKUT" - a reinforced version of the classic OVS-25
• OVU-25 "BERKUT" with extended discharge - a model with an extended discharge conveyor
• OVU-25 "SOKIL" - a reinforced OVS-25 with an integrated cyclone
• OVU-25 "SOKIL" with extended discharge - a model with a cyclone and an extended discharge conveyor
• OVU-25 "YASTRUB" - a premium model with a cyclone and a grain trimmer
• OVU-25M "BORYVITER" - the flagship model with a cyclone + MOP and a gear motor drive

More details about these models of grain cleaning machines can be read on the corresponding page of the site, but they all have one common feature - they were created as a direct response to the real demands of Ukrainian farmers and the challenges of the modern market. Understanding the conditions in which such equipment operates and the typical problems faced by their owners, our engineers carried out a comprehensive reinforcement of all key elements of the machine - chains, shafts, augers, and bearing assemblies, as well as the frame, bumper, and sieve mills. The design of all grain cleaning machines produced by Zavod Moroza is engineered for peak loads and intensive work throughout the season. Their exceptional rigidity and resistance to vibrations significantly reduce the risk of breakdown from a stone or foreign objects entering them or from an accidental collision. All this guarantees smooth, stable, and effective operation, significantly extends the service life, and, most importantly, minimizes the risk of downtime.

The basis of mechanical cleaning in all grain cleaning machines from Zavod Moroza is the sieve mill block, the design of which combines a time-tested classic layout with a series of important modern improvements. This block consists of two parallel-operating sieve mills, which contain a total of 8 sieves (4 per mill) with a standard canvas size of 790x990 mm. We deliberately use this classic configuration because it is a decades-proven layout that guarantees high productivity, and the use of standard and common size sieves is an additional practical advantage for any farm. However, understanding that this unit experiences maximum loads and was traditionally considered a vulnerable spot, our engineers have significantly reinforced it by increasing the overall strength of the mills themselves, implementing an improved connecting rod design to increase their service life, and also increasing the number of brushes for sieve cleaning from 24 to 32 units. This latest update now provides a key advantage when working with difficult material - the brushes effectively prevent the clogging of openings, even if the grain has high moisture or is heavily contaminated. As a result, this reinforced and refined unit guarantees consistently high cleaning quality and reliable, uninterrupted operation of our grain cleaning machines under any conditions.

Understanding that every farm has unique tasks and working conditions, we have developed a range of models with specific design features that significantly expand the standard functionality of OVS-25 type grain cleaning machines. For instance, for farms working with modern transport, we offer models with an extended discharge conveyor - this solution allows for easy direct loading of high-sided vehicles without the use of intermediate loaders. For maximum optimization of logistics on the threshing floor, we offer models with a trimmer - this device operates on the principle of a grain thrower, allowing you to direct a powerful stream of clean grain to form high piles or to evenly fill a truck bed. And for work in enclosed spaces where cleanliness and labor safety are a priority, we offer models with a high-efficiency cyclone, which almost completely eliminates dust from the work area. The availability of these unique configurations allows every farmer to select a grain cleaning machine as a specialized tool that perfectly matches their specific production processes, needs, and logistics. Moreover, we are always open to dialogue and ready to make individual design changes to solve the most specific tasks. The core of our grain cleaning machines is based on a well-thought-out modular principle, which allows for fast and inexpensive customization for the ideal integration of the equipment into your work processes.

Stationary Grain Cleaning Machines OVS-25

The cleaning system used in the classic OVS-25 has proven its high efficiency and reliability to such an extent that it has already become an industrial standard in Ukraine. That is why, in addition to the classic self-propelled models, Zavod Moroza has developed a line of stationary grain cleaning machines. These are the same powerful and proven blocks of air and sieve separation, but without the running gear and scraper loading, designed for integration into existing technological lines. Such grain cleaning machines are widely used in grain cleaning complexes (ZAV), elevators, on threshing floors, and in grain storage facilities, where the feeding of grain material is organized by means of norias or conveyors. So that you can choose the optimal solution for your specific complex, we offer several variants of stationary machines:

• OVU-25U stationary reinforced - a basic cleaning module for reliable integration into existing grain cleaning lines (ZAV)
• OVU-25U stationary with elevator and wheels - a universal mobile version with an elevator for flexible work within a threshing floor or warehouse
• OVU-25U stationary with elevator and cyclone - the most popular stationary model with a cyclone and elevator, ensuring high standards of cleanliness and labor safety

At the core of every stationary grain cleaning machine from Zavod Moroza lies a single philosophy - the combination of the classic, time-tested OVS-25 cleaning system with modern engineering aimed at maximum reliability and durability. This guarantees stable high productivity and separation quality thanks to the effective operation of the air system and sieve mills. At the same time, the strength of the structure, achieved through the use of thicker metal and reinforced units, ensures a long service life and faultless operation even under intensive loads. To solve specific tasks, our lineup offers models of grain cleaning machines equipped with additional units: a discharge elevator allows for lifting the cleaned grain to the required height for convenient transport loading, and a high-efficiency cyclone ensures dust-free operation, which is critically important for enclosed spaces. This approach allows us to offer stationary grain cleaning machines that consistently demonstrate high efficiency and are a reliable investment in the development of a farm.

One of the main advantages of stationary grain cleaning machines from Zavod Moroza is their exceptional adaptability - we ensure full integration into existing lines, which requires considerable precision, so we offer flexible modernization options. The height of the discharge elevator can be changed according to your needs - either extended or shortened, and the basic model can be retrofitted with a cyclone. Our engineers are ready to select the optimal pulleys and belts for perfect synchronization with your equipment or even adjust the overall dimensions of the machine for its installation in a limited space. Every ZAV or grain storage facility has its own peculiarities, and our task is to offer a machine that will be an ideal solution, fitting perfectly into your infrastructure. Such an individual approach turns a purchase into the creation of a unique unit, configured specifically for your farm, which guarantees maximum efficiency and ease of operation.

Grain cleaning machines from Zavod Moroza are, first and foremost, a tool for building an effective, stable, and predictable work process. Unlike outdated analogues that require constant supervision and often break down at the most critical moment, our grain cleaning machines are designed for uninterrupted operation. A well-thought-out design, reliable components, and high productivity allow for a significant reduction in labor intensity, shorten the time for post-harvest processing, and provide confidence in a consistently high result. This gives you the most valuable resource - peace of mind and the ability to focus on the strategic development of your business, knowing that all grain cleaning processes are under reliable control.

Contact our specialists, and we will help you choose the optimal solution that will increase the efficiency of your work processes and become the basis for the predictable growth of your business.