A trapped key system that can't be cheated
At Guardian Glass, employees could bypass the key removal sequence on the old interlock. With SHGV Forced Extraction, the key physically cannot come out until the safety sequence is complete.
- CLIENT
- Guardian Glass
- APPLICATION
- Interlock for hazardous machine access
- PREVIOUS SETUP
- Key removal sequence could be bypassed
- SOLUTION
- SHGV Forced Extraction
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The challenge, how SHGV Forced Extraction works, the comparison and the result at Guardian Glass.
A standard trapped key still depends on the operator doing the right thing.
Trapped key interlocks are meant to force a safe sequence before anyone reaches a hazardous machine area. In practice, that sequence can depend heavily on operator compliance.
A standard system may let an operator skip a step, force a key out of order, or work around the interlock under time pressure. Safety then rests on procedures, training, supervision and discipline.
Employees were able to bypass the key removal sequence on the previous setup.
An interlock designed so the sequence cannot be followed incorrectly, by choice or by mistake.
The maintenance key cannot be removed until the safety sequence is complete.
SHGV Forced Extraction works on a different principle. Key removal is enforced by the mechanism itself, not merely expected by procedure, so safety no longer relies solely on training, supervision or operator discipline.
Other brands vs SHGV Forced Extraction
The failure mode is gone.
Guardian Glass chose SHGV Forced Extraction because employees could bypass the key removal sequence on its previous setup. Since the switch, the mechanical design has stopped employees working around the sequence, on purpose or by mistake, and the plant reports it is satisfied.
Al Mansoor Building - 114 - Al Qusais, Dubai, UAE · +971 52 535 9194 · websales@creativeautomation.ae
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