Trantec's Range of Metering Feeders, Loss in Weight Feeders & Gravimetric Feeders

Principles of operation     

The vast range of dry bulk solids used in today’s industries requires specialist machinery to accommodate the equally vast range of material characteristics. The Trantec S3 range of modular precision feeders have been designed to cater for this variety. Specific configurations of auger, agitator and hopper shape combined with sophisticated control electronics offer superior performance at every level of material handling.  

The principles of screw feeding are well established. Material must be loaded into the auger to produce consistent density and fill levels. Once achieved, each rotation of the auger causes product to move along the feeder tube to the outlet. Varying the speed of rotation, size and pitch of the auger will alter the quantity of material delivered.

Free flowing materials can be metered very accurately with minor intervention. Cohesive products require careful hopper design and gentle agitation to move the product into the auger. The exact type of auger and agitator For maximum accuracy together with their relative speeds must be carefully chosen., Gravimetric feeding using sophisticated software algorithms to monitor material flow rates are employed. Accuracy’s of 0.25 % are readily achieved. The addition of weighing control allows monitoring of material usage and batch traceability, essential for complete quality control.

Universal feeder for Powders, Granules, pellets, flakes etc... 

·         Feed rates from 0.1 to 25,000 litres per hour.

·         High accuracy.

·         Quick release for easy cleaning.

·         Modular construction with interchangeable feed screws.

·         Contact materials FDA & EC approved for food use.

Easy Clean Design  

The Trantec S3 range offer full “Quick Release” features for easy cleaning and maintenance. Each removable component is safety interlocked for total protection. 

Feed Screw Selection

Selection of the right feed screw is essential to achieve optimum performance and accuracy. Trantec Solids Handling offer a free test and evaluation service to all our customers. A full report stating feed rates achieved, accuracy and dynamic range will be prepared together with our recommendations for your materials. For further details please telephone or fax with your application.  

Gravimetric Control    

By combining the S3 precision feeder with advanced Gravimetric controls a highly intelligent system is formed. Gravimetric controls constantly monitor the amount of material lost by the feeder over time. This weight loss is converted into a flow rate which is compared with a target flow rate held in the controller. Any discrepancies between target and achieved flow rates are automatically corrected by adjusting the speed of the screw feed. The whole process is self contained and requires only a target feed rate from the operator or main process control computer.

S3 Gravimetric controllers can be interlinked to form complete ingredient preparation systems. Recipes and formulations are stored by a central computer, PLC or S3 Data Terminal which has control over each Gravimetric module. Formulations are prepared automatically and batch totals stored for later analysis. Full batch and ingredient traceability is available combined with reports on daily, weekly, yearly or hourly usage of materials. All modules can be monitored remotely and interconnection is by a single multicore cable. 

Multi Feeder System

Additional feeders or control I/O modules can be added as required S3 Gravimetric controllers are specifically designed for modular use allowing future expansion.

Connection to existing SCADA or main frame computers is achieved by Arcnet or RS 232 interfaces. Remote monitoring at distances up to 1 Km are typical. I/O interfacing to control related equipment such as valves or level sensors can be included.