Application
Flameless Venting for Indoor Collectors in Food Plants
Answer in brief
Most food plant collectors stand indoors, which rules out a conventional vent panel.
A flameless device lets the collector be protected where it is, by quenching the flame and retaining the burning dust.
- Size the vent area including the device efficiency.
- Keep the quenching element clean and inspected.
- Isolate the ducts, because the device protects only the vessel.
Reviewed October 21, 2026 · Updated October 21, 2026
The problem
A vented collector indoors would discharge a fireball into the production area, which is why the panel alone is not an option.
Desired outcome
An indoor collector protected to the reduced explosion pressure its construction allows, with the connected ducts isolated.
Process approach
The vent area calculation uses the device efficiency, so the opening is larger than for a bare panel on the same vessel.
The quenching element has to be inspected: a mesh blinded by product does not perform as tested.
Isolation on the inlet and outlet ducts prevents an event from travelling to the mill or the silo.
- Vent area calculated with the device efficiency.
- Inspection regime for the quenching element.
- Isolation on connected ducts.
Selection factors
- Explosion characteristics of the collected dust.
- Collector strength and the reduced pressure target.
- Device efficiency and the resulting vent area.
- Cleaning access to the quenching element.
- Duct geometry for isolation devices.
Common failure modes
- Vent area calculated without the device efficiency
- Quenching element blinded by product
- Device fitted while the ducts stay unisolated
- Collector strength assumed rather than established
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