---
title: "Anti-bridging device"
description: "Anti-bridging device is the generic procurement term for any flow-aid hardware installed to prevent or break bridging, rat-holing and other discharge stoppages in a hopper or silo. The category covers a range of technologies with overlapping use cases."
canonical_url: "https://sylio.co/glossary/anti-bridging-device"
last_updated: "2026-06-28T02:29:32.415Z"
---

**Anti-bridging device** is the generic procurement term for any flow-aid hardware installed to prevent or break [bridging](/glossary/bridging), [rat-holing](/glossary/rat-holing) and other discharge stoppages in a [hopper](/glossary/hopper) or [silo](/glossary/silo). The category covers a range of technologies with overlapping use cases.

## Anti-bridging device families

<table>
<thead>
  <tr>
    <th>
      Family
    </th>
    
    <th>
      Mechanism
    </th>
    
    <th>
      Best suited to
    </th>
  </tr>
</thead>

<tbody>
  <tr>
    <td>
      <a href="/glossary/sonic-horn">
        Sonic horn
      </a>
    </td>
    
    <td>
      Continuous acoustic vibration
    </td>
    
    <td>
      Most powders, especially cohesive Class-C; non-contact
    </td>
  </tr>
  
  <tr>
    <td>
      <a href="/glossary/air-cannon-air-blaster">
        Air cannon / air blaster
      </a>
    </td>
    
    <td>
      Periodic high-pressure pneumatic blast
    </td>
    
    <td>
      Hard bridges, large silos, established practice
    </td>
  </tr>
  
  <tr>
    <td>
      <a href="/glossary/bin-vibrator">
        Bin vibrator
      </a>
    </td>
    
    <td>
      Continuous mechanical or pneumatic vibration
    </td>
    
    <td>
      Small bins; can compact wet material
    </td>
  </tr>
  
  <tr>
    <td>
      <a href="/glossary/fluidisation-pad-aeration-pad">
        Fluidisation pad
      </a>
    </td>
    
    <td>
      Aerates the lower bed
    </td>
    
    <td>
      Dry, fluidisable powders
    </td>
  </tr>
  
  <tr>
    <td>
      <a href="/glossary/whip-hammer">
        Whip hammer
      </a>
    </td>
    
    <td>
      Manual impact
    </td>
    
    <td>
      Legacy practice; HSE concerns
    </td>
  </tr>
  
  <tr>
    <td>
      Mechanical extractor
    </td>
    
    <td>
      Bypasses the discharge
    </td>
    
    <td>
      Continuous-flow processes
    </td>
  </tr>
</tbody>
</table>

## Selecting a device

Selection depends on material properties ([Geldart class](/glossary/geldart-classification), moisture, temperature), vessel geometry and operating mode. Sonic horns are increasingly the default specification because they cause no structural stress, work continuously, and integrate cleanly into existing control systems.

## Related terms

- [Bridging](/glossary/bridging)
- [Hopper](/glossary/hopper)
- [Silo](/glossary/silo)
- [Sonic horn](/glossary/sonic-horn)
- [Air cannon / air blaster](/glossary/air-cannon-air-blaster)
- [Bin vibrator](/glossary/bin-vibrator)
- [Material flow promotion](/glossary/material-flow-promotion)