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Pneumatic Natural Frequency Feeders - Model DNFF & DNFC

The DECA pneumatic natural frequency feeders and conveyors Models DNFF and DNFC are designed to transport a wide range of materials over distances from 1 meter to 25 meters. The low frequency high
amplitude operation is particularly suitable for conveying the normally difficult to move materials on vibratory equipment such as those with low density and large mass.

Due to the lower operating frequency, the troughs can be lighter and less rigid than conventional designs. Generally a simple ‘U’ shape design is all that is required using 16 gauge mild steel or stainless steel sheet. The troughs can be open or totally enclosed and are supported by special fiber glass leaf springs. These are chosen from a pre-selected range for each individual feeder or conveyor, thus ensuring that resonance occurs at the operating frequency.

The power required from the vibrator to drive the units at resonance is minimal and most economic in air consumption. The operating frequency of approximately 600 VPM is developed by the DECA pneumatic linear vibrator series POV. They are robust in construction and extremely quiet in operation. Adjustments to frequency and amplitude can be regulated independently.

Feeders Model DNFF can be supplied from 1 meter to 2 meters in length, free standing if used with a heavy base on rubber feet or for attaching directly to solidly fixed structures. See overleaf for standard range.

Conveyors Model DNFC are from 2 meters to 25 meters in length, up to 500 mm wide. These must be bolted firmly to the floor via a framework or angle supports.

TECHNICAL GUIDE TO DNFF FEEDERS - Other sizes and DNFC models quoted on request.

Feed Rate based on dry sand weighing 1600 kg/M3 (100 lbs./cu.ft.).