Air-table gravity separator for seed, grain and dry-food grading

Air-table gravity separator for seed, grain and dry-food grading

This profile defines a sourcing requirement for air-table gravity separator. Suitable suppliers, origin, availability, and commercial terms are confirmed for the buyer’s project. The sourcing brief is structured around capacity, application, operating environment, required standards, destination, and delivery scope; the exact configuration requires supplier confirmation.

The system separates seeds and dry agricultural products by specific-weight difference after screens or dimensional cleaning can no longer remove light, immature, damaged, or similarly sized contaminants. An air-fluidized deck and controlled reciprocating motion divide the feed into heavy accepted product, light reject, and adjustable middling fractions. Deck area, air distribution, longitudinal and transverse inclination, eccentric speed, feed rate, product moisture, and recirculation determine capacity and separation quality.

Process role and configurations

Gravity separation depends on the combined bulk behavior, density, size, shape, surface, and aerodynamic response of the feed; it cannot guarantee that every acceptable and defective kernel will separate. Configurations can process cereals, maize, fine seeds, legumes, cottonseed, oilseeds, rice, grass and tree seed, pulses, and nuts. Operators tune deck speed, airflow, deck surface, longitudinal and transverse inclination, feed rate, and discharge split. A return conveyor can recirculate middlings, while dust hoods, aspiration, and cyclone equipment manage airborne material.

Equipment ranges extend from laboratory and pilot units to industrial-capacity machines with mechanical, semi-automatic, or PLC control and optional recipe memory. The technical schedule records usable deck dimensions, installed power, fan and air volume, throughput range, product density and moisture basis, inlet contamination, target purity, acceptable product loss, middling recirculation, dust extraction, controls, footprint, and utilities. Capacity is quoted against the named product and acceptance test rather than as one universal headline value.

Line design and acceptance

Define the upstream cleaner, grader and destoner; feed uniformity; crop and variety; moisture; bulk density; incoming foreign material; desired heavy, light and middlings fractions; target recovery and purity; and downstream conveying. Ask for deck area and material, feed control, motor and fan load, air volume and static pressure, dust-extraction points, footprint, working clearances, noise, vibration isolation, electrical panel and available automation interfaces. Where combustible agricultural dust exists, conduct a site-specific dust-hazard and explosion-protection assessment.

A sample trial should use representative lots across the normal quality range. Weigh every fraction and calculate purity, recovery, good-product loss, carryover and throughput after stable settings are reached. Record deck angle, frequency, airflow, feed rate and moisture so the result can be repeated during commissioning. Evaluate clean-down time and cross-crop contamination, particularly in seed and food applications.

Obtain a signed process guarantee or acceptance criteria, general arrangement, foundation/load data, electrical and aspiration drawings, food-contact or material declarations where relevant, conformity documents, wear and spare-parts list, training, warranty and remote/on-site service terms.

Procurement and project delivery

AgriTech.tr can structure the technical requirement and compare current supplier responses for the buyer’s project. Installation, commissioning, operator training, warranty, spare-parts, and after-sales scope must be confirmed in each supplier quotation. The final scope should be documented against the approved application, capacity, site conditions, destination, and delivery schedule in the selected supplier quotation and contract.