Complete ATEX Filling Line

How should an ATEX filling line respond to a downstream blockage?

The line should follow an agreed cause-and-effect response that prevents uncontrolled accumulation of open, filled or unstable containers while placing product flow and movement in the defined safe state. The response may pause infeed, inhibit new fills, complete or stop the active dose and hold containers at controlled positions.

Define the detection point, maximum accumulation, state of the current pack, capping availability, alarm, operator action and restart sequence. Test the blockage at more than one point because a stop before the capper can have a different consequence from a stop after closure.

Which signals should be exchanged between the filler, capper and labeller?

Each module should exchange the minimum clear signals needed to coordinate readiness, demand, blocked or starved state, faults, emergency conditions and controlled restart. The exact interface depends on the line architecture, but vague “volt-free contact” descriptions are insufficient without signal meaning, normal state and response.

Create an interface schedule showing signal owner, electrical or network method, timing, safe state, alarm text and FAT/SAT test. Retained third-party equipment should be included rather than treated as a black box.

How should containers be tracked through a hazardous-area filling line?

Container tracking should preserve the status of each pack from detection through filling, closure, inspection and discharge so that partial, rejected or unverified containers cannot be mistaken for accepted product. Tracking may use positions, sensors, recipe state and reject confirmation rather than a complex serialised system.

Specify what happens after a stop, manual removal, sensor fault, power loss or reintroduction of a container. The recovery method should be understandable to operators and testable without bypassing protective functions.

What belongs in the cause-and-effect matrix for a complete ATEX line?

The cause-and-effect matrix should cover every condition that changes whether the line may start, continue, stop, isolate or restart. Typical inputs for review include container position, guards, emergency stops, product supply, extraction, earthing or bonding, full or empty sensors, downstream availability, rejects, utilities and communication faults.

For each input, record the affected machines, product-valve state, motion response, alarm, reset authority and proof method. The controls and interlocks guide provides a wider framework.

What should the line do if the capper cannot accept a container?

The line should move to the documented safe state without continuing to create open filled packs that have nowhere controlled to go. The cause-and-effect schedule should define whether new fills are inhibited, which conveyors stop, how required extraction remains available and how the operator recovers the affected containers.

Plan the fill-to-close sequence →

Which documents link separate machines into one accepted line?

Use a line layout, interface register, equipment schedule, control narrative, cause-and-effect table and FAT/SAT traceability matrix. These records show which equipment owns each sensor, permissive, reject, stop and recovery action.

Review the evidence and handover guide →

IBC and large-drum line design

Define pallet access, weighing, fill-point extraction, overfill response and the finished-container route.

Nitrogen purging and inerting

Connect oxygen control, gas supply, monitoring, alarms and safe restart to the line control narrative.