Fluid-bed Granulator and Coater

The family covers these process types, but the actual capability depends on the configured product container, nozzle position, spray system, filters, controls, and accessories. The quotation and process diagram must identify the required mode or modes; a drying-only arrangement should not be assumed to include coating hardware.

Provide batch size, bulk and tapped density, initial and target moisture, particle-size distribution, flow, temperature sensitivity, solvent or binder information, target granule or coat attributes, containment needs, and available air and exhaust conditions. Laboratory trials are valuable when fluidization or spray behaviour is uncertain.

The endpoint should relate to the product requirement, such as residual moisture, loss on drying, granule properties, or coating weight gain. Inlet temperature or elapsed time alone does not prove the endpoint. The test method, sampling location, sampling frequency, and acceptable range should be agreed before validation work.

Possible causes include unsuitable loading, wide particle distribution, cohesive material, insufficient or excessive airflow, wet filters, poor distributor selection, electrostatic effects, overwetting, or an incorrect spray pattern. Trial records should capture pressure drop, air conditions, spray rate, filter cleaning, and product observations so the cause can be separated from the symptom.

Confirm conditioned-air supply, heating medium, compressed air, exhaust capacity, filtration, dust collection, drainage, electrical standard, room pressure, safe access, material charging and discharge, and any explosion or solvent controls. Larger models also require a layout review for product containers, lifting, cleaning, and maintenance clearance.