Since 1952, Union Engineering has established itself as a leading provider of specialist grain screening solutions for South Africa’s agricultural sector. What began as a metal fabrication company has evolved into a technologically advanced manufacturer of high-volume grain screens—an essential component of modern grain handling and processing.

At the Heart of Grain Quality: Screening Technology That Matters

Grain screening plays a crucial role in determining the quality and market value of any grain product. Union Engineering’s technology focuses on precise particle classification—separating materials based on size. This is vital not only for cleanliness and grading but also for reducing rejections, ensuring uniformity during processing and improving storage and logistics efficiency.

Using high-speed vibration—up to 3000 RPM—grain is quickly and efficiently stratified on the screen decks. This stratification enables the effective separation of smaller particles, such as dust, husks and plant debris, from the main product, resulting in a cleaner and market-ready grain.

Two Models, One Philosophy of Performance

Union Engineering offers two standard models of static grain screens:

• Union 1812 Grain Screen: The flagship model with an impressive capacity of up to 100 tons per hour. It is ideal for large-scale farmers or processing facilities. With standard mesh options for maize, soybeans and sunflower, this robust machine is built for high-output operations.
• Union 1212 Grain Screen: This smaller unit handles up to 50 tons per hour and offers the same technological advantages as its larger counterpart but at a scale more suited to mid-sized farming operations. It is a cost-effective solution without compromising on quality or performance.

Both models are available in static and mobile configurations, allowing farmers to either integrate the screens into existing silo complexes or use them as flexible, stand-alone units on the farm.

Modular Design for Maximum Flexibility

What truly sets Union Engineering’s equipment apart is its modular design philosophy. A basic unit can be adapted with various components to meet specific needs, including:

• Pre-cleaners: To separate unwanted material like green pods or coarse stalks before main screening.
• Augers: For efficient discharge of both fine material and clean grain.
• Easily interchangeable mesh panels: Allow operators to switch between crop types—maize, wheat, soybeans, oats, or canola—in under an hour.

These features enable producers to transition seamlessly between crops, saving time and increasing throughput during busy seasons.

Direct Benefits to the Farmer

Union Engineering's approach is firmly rooted in practical, farmer-centric design. The direct benefits to producers are numerous:

• Increased Profit Margins: Cleaner, better-graded grain fetches higher prices in local and export markets.
• Time Efficiency: Quick setup, simple operation, and fast changeovers between crops save valuable hours during critical harvesting windows.
• Reduced Waste: By removing impurities and damaged particles early in the process, farmers waste less and maximise usable yield.
• Lower Operational Costs: These screens are low-maintenance and designed for long-term durability, helping to reduce ongoing input and servicing expenses.
• On-Farm Versatility: Mobile units allow screening to happen where it’s most convenient—whether at the silo, near the harvester, or close to transport infrastructure.
• Improved Storage Quality: Clean grain stores better, reducing mold, insect risk, and spoilage over time.

Ultimately, Union Engineering empowers farmers to take greater control of their grain quality, processing flow and profitability, without needing a large workforce or complex infrastructure.

Sustainable Technology with Low Operating Costs

Union Engineering’s grain screens are not only effective, but they are also designed for simplicity and durability. Each unit is fully commissioned upon installation and includes comprehensive training for staff. The result is a straightforward day-to-day operation that keeps labour efficient, reduces downtime and lowers overall input costs.

Applications and Benefits in Real-World Agriculture

These high-frequency screens are employed across a wide range of agricultural applications, including:

• Grain Cleaning: Removing unwanted debris for higher quality classification.
• Size Grading: Sorting grains by size for niche markets or precision processing.
• Adjustable Angles: Screens can be tilted to suit the grain type and desired screening efficiency.
• Market-Ready Output: Clean grain reduces rejections and improves grade at the point of sale or storage.

The impact is tangible: higher net return per ton, improved grain standards, and reduced storage or contamination risk.

A Legacy of Engineering Excellence

Union Engineering is far more than just another supplier of agricultural machinery. With roots deeply embedded in South Africa’s farming history, the company has proudly served the sector for more than 70 years. In addition to agriculture, they are also active in mining, transport and construction, where precision engineering and rugged reliability are equally essential.

Future-Focused Growth: Adaptability and Tailored Solutions

With a growing demand for modern, precise handling of agricultural products, Union Engineering is now more focused than ever on custom solutions. Their ability to design and retrofit screens specifically to match clients’ silo layouts or operational flow means that farmers receive solutions tailored to their exact needs—without needing to overhaul entire systems.

Conclusion:
Union Engineering exemplifies how technology and tradition can work in harmony. With proven engineering, practical agricultural insight and forward-thinking innovation, they provide solutions that not only work but elevate the entire grain production cycle. In a world where efficiency and grain quality are critical to profitability, Union Engineering offers the competitive edge of experience, accuracy, and adaptability to today’s progressive farmer.