230v Fire Door Holders

230v fire door holders are devices used to secure fire doors in an open position, but automatically release them when a fire alarm is triggered. They require a 230v AC power supply. They work by holding the door open with a magnetic force, but then releasing the door when a fire alarm is activated, allowing it to close and seal the room, helping to contain the fire and smoke. These holders provide added fire protection and help ensure safe evacuation in the event of a fire.