Hopper vibrators


Powdery materials and products stored in silos or hoppers often tend to clog. This leads to the formation of crowns and chimneys, with the following effects:
• reduced storage capacity;
• major flow irregularities at the outlet of the hopper, even resulting in a complete halt of the flow.

Setting the walls of silos or hoppers at a considerable slope—which has the disadvantage of reducing storage capacity—does not resolve the problem of clogging, since it happens even with vertical walls.

De-clogging devices pay for themselves very quickly, since they guarantee:
- use of 100% of storage capacity
- no more production interruptions.

SINEX recommends a technique of de-clogging by external vibration, using rotary, electromagnetic or pneumatic vibrators, which can de-clog low- to medium-capacity silos and hoppers; this vibration should cause a slight deformation of the walls to which the vibrators are attached.


• The amplitude of the vibrations can be adjusted during operation by a rheostat.
• The possibility of instant stopping to avoid unwanted vibrations on the weighing instruments is especially useful when de-clogging weighing bins.
• Voltage: single-phase 220 or 380 volts, 50 Hz.

See our range of vibrators


• The thrust can be adjusted by shifting the unbalances.
• The option of intermittent vibration, by adding a control card, guarantees consecutive starting and stopping of the vibrator (for example, 15 seconds of operation followed by 45 seconds of stopping). During the slow-down that occurs after cutting the power, the vibrator "couples" with the resonant frequency of the hopper, causing the crowns or blockages to collapse.
• Voltage: three-phase 220 or 380 volts, 50 Hz.

See our range of vibrators


In places with explosive, gaseous or dusty environments, pneumatic vibrators—which are easy to install and operate in any position—can be used for de-clogging weighing bins or low-capacity bins.
• Compressed air: 6 to 8 bars.