Dealing with Preload on Electric Strikes | Ask the Experts | Electronic Access Ace | Ask the Experts

I have a customer that wants an electric strike installed. They have heavy air flow due to an industrial air conditioning system. How would this affect the electric strike I chose?

The biggest factor would be preload. With an industrial AC unit, the air handler pulls in and then cools outside air. This causes the overall air pressure in the building to increase, and presses doors against their frames and latching mechanisms. When a door’s latch is pressed against an electric strike’s keeper, it can keep the strike from releasing when triggered. A few strikes have been designed to deal with this preload issue and can still release even with the door latch pressed against the keeper. A couple examples would be the Adams Rite UltraLine 7400 series and HES 7000 series electric strikes.


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